LAMAR B. ROUNDTREE

**** ***** *****

Waldorf, MD 20603

301-***-**** (Home)

240-***-**** (Cellular)

ac4ybc@r.postjobfree.com

https://www.linkedin.com/pub/lamar-roundtree/2a/374/634

OBJECTIVE: Seeking a Challenging position as a Telecommunications / Systems Engineer, capable of providing hardware and software engineering support, and technical assistance related to communications infrastructure, digital signal processing systems, and interfaces in support of telecommunications systems.

SUMMARY OF QUALIFICATIONS

Over Eighteen years of professional experience in antenna design, electromagnetic modeling, RF systems design/analysis, direction finding system design/analysis, satellite and wireless RF communications system design/analysis.

Active Department of Defense Secret clearance

Bilingual-fluent in both English and Arabic (Written and Oral)

Department of Defense 8570.1 Compliant, CompTIA Security + Certification

Expertise in antenna design, electromagnetic modeling, satellite (space-based) communications (GPS, payloads, transceivers, antenna, earth station) and airborne/aircraft radio systems (Doppler navigation, direction finding, communications, range, altimeter)

Experienced with system architecture design, requirements analysis, performance optimization

Experienced with RF system and waveform modeling/simulation/analysis (Mat lab/Simulink, Advanced Design System, Eagle ware/Genesys)

Satellite link budget analysis

Knowledge of tower and antenna support structures

Knowledge of asset information gathering

Knowledge of digital modulation techniques and complex IQ signal processing

Design knowledge of antennas, receivers, up/down converters, tuners, Pl Ls, frequency synthesizers

Knowledge in testing & measurement technique with various test equipment supporting performance optimization and maintenance telecommunication network system.

EXPERIENCE

Satellite Systems Engineer, Computer Science Corporation, Goddard Space Flight Center, Greenbelt, MD, December 2014-Present

Provide SATCOM Systems engineering and technical support at the Network Integration Communications Center to identify the technical approach to resolve specific Wide band Global SATCOM (WGS) and Defense Satellite Communications Subsystem (DSCS) satellite payload control and network issues, develop models and simulations for alternate solutions, and support the test and evaluations of prototypes. Prepare engineering plans and test plans and procedures and assist in guiding test and evaluation activities in support of these efforts.

Excellent oral and written communications skills and capable of working in an integrated project team environment.

Extensive experience and expertise in system architecture, planning, design, engineering, network management, operations and support of medium to large multi services enterprise networks.

Perform engineering activities as they pertain to space based equipment.

Development of SATCOM system specifications, engineering plans and test plans; development of SATCOM based architectures and frameworks.

Development of test plans and procedures; provide support to technology working groups and integrated product teams; develop technology development plans.

Provide support in assessment of technology maturity; develop technology transition plans.

Understanding of Internet Protocol networking principles and various transmission data (TCP, UDP, etc

Knowledge and experience with Frequency Division Multiple Access, Multi-Frequency Time Division Multiple Access and Internet Protocol Modems.

Experience with DOD networks and satellite systems including Wide band Global Satcom (WGS) and Defense Satellite Communication Subsystem (DSCS),

DOD Certification and Accreditation process, Cisco and Juniper router experience

Experience in Voice over IP and Cisco Call Manager equipment experience is highly desirable.

Experience with Large, fixed Enterprise SATCOM systems (C-, X-, Ku- and Ka-band transmitters greater than 6 meters) is desirable.

Radio Engineer / Transmission Engineer, Sprint, Riyadh, Kingdom of Saudi Arabia August 2014 – December 2014

Determine transmission solution for new BTS/Node and insure a timely response in order to support the RF Coverage Planning Office and Roll out Division. Evaluate base receiver stations placement in the assigned area and insure a quality transmission topology. Develop redundant transmission paths where traffic needs require it. Evaluate line-of-sight between the above using available digital and physical maps and design microwave links accordingly, link budget, height requirements, channel plans and interference studies – various software tools .Perform site-surveys where necessary in order to determine obstacles restrictions, possible Fresnel obstructions. Evaluate and maintain transmission plans layouts and schematics in the assigned local areas. Chose appropriate infrastructure for each BTS/Node, given future transmission needs. Decide which sites require heavy load towers by considering long-term transmission requirements and signal them to all involved departments. Provide support for contractor microwave-related works. Provide project-plans for more complex works and issue MW-related work orders.

Determine transmission solution for new BTS/Node and insure a timely response in order to support the RF Coverage Planning Office and Roll out Division.

Evaluate base receiver stations placement in the assigned area and insure a quality transmission topology.

Develop redundant transmission paths where traffic needs require it.

Evaluate line-of-sight between the above using available digital and physical maps and design microwave links accordingly, link budget, height requirements, channel plans and interference studies – various software tools.

Perform site-surveys where necessary in order to determine obstacles restrictions, possible Fresnel obstructions.

Knowledge of tower and antenna support structures

Knowledge of asset information gathering

Produce predictions and simulations, and calculate Coverage & Capacity design KPIs

Perform RF design link budget analysis

Produce fiber and rack diagrams in Visio /Auto CAD.

Designed and enforced active and passive RF circuits.

Evaluated antenna requirements and development.

Coordinated in high-level project analysis, technical specifications and long-range project plans.

Managed training and development programs.

Evaluate and maintain transmission plans layouts and schematics in the assigned local areas.

Chose appropriate infrastructure for each BTS/Node, given future transmission needs.

Decide which sites require heavy load towers by considering long-term transmission requirements and signal them to all involved departments.

Provide support for contractor microwave-related works. Provide project-plans for more complex works and issue Microwave work orders.

LTE Systems Engineer, Sprint Nextel, 4G Development and Integration, Reston, VA February 2014 – August 2014

Provide subject matter expertise and program management support to research laboratory client. Provide support to a client program manager in the development of Radio-Frequency (RF) wireless data network requirements and evaluation of wireless network concepts. Perform analysis of RF technologies, including Software-Defined Radio (SDR) platforms with advanced waveforms, Multiple Input-Multiple Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), and Low-Density Parity-Check (LDPC) codes. Provide RF-related technical advice to client personnel and guidance. Experience with design of radio-frequency (RF) and data networks, including Wi-Fi, WiMAX, or LTE-Experience with RF protocol standards and signals, including OFDM-Experience with SDR technologies, including Universal Software Radio Peripheral (USRP) or GNU radio-Experience with RF measurement or characterization equipment-Experience with RF Antenna design, including directional propagation, beam-steering, or MIMO-Experience with wireless data network security-Experience with requirements analysis-Experience with operations of wireless data networks.

Small Cell and HetNet related technologies such as: Interference Cancellation

SON, Carrier Aggregation, multi-band Traffic Management, Inter-RAT Interoperability and Enhanced Mobility.

Multiuser Detection (MUD), multiuser scheduling and or media access control (MAC) protocols

In depth working expertise with LTE-FDD, LTE-TDD, UMTS,Small Cells, VoLTE, Spectrum management, Wi-Fi, SON, smart antennas, HetNet cloud and NFV core, Apple and Android devices and applications.

Develop software in VHDL for FPGA and CPLDs

Develop software for microcontrollers in C/C++

Develop user interface for platform using the LabVIEW programming environment

Assist with developing and executing test procedures for hardware and software components

Write or review software and system documentation

Provide radio optimization, use of ARQ, Hybrid ARQ, PHS and ROHC amongst the techniques that can be implemented.

Experience working with OEM supporting Tier I carrier project for Ericsscon,ALU,and Samsung

Experienced in designing and developing Java, C# and C++ solutions in Linux/Windows, UML/SDLC and object-oriented design, design patterns, Visual Basic, VB.NET, Python, COM, HTML & JavaScript, PHP, MySQL and PostgreSQL

Design in-building & outdoor venues deploying Metro Cells/DAS using iBwave software. Analyze existing indoor coverage from macro network using walk test reports from TEMS/JDSU/NEMO to identify the needed coverage & capacity enhancements

design and optimization software such as Ericsson’s software Planet EV, Agilent Technologies wizardTM,, Forsk,Atoll and AIRCOM International ASSETT

Deliver quality indoor RF design by selecting optimum solution considering technology, antenna selection, building layout and affect to macro network

Telecommunications Design Engineer III, Sprint Nextel, 4G LTE/ Femto Cell Development and Integration, Reston, VA June 2013 – February 2014

Provides radio frequency (RF) and/or wireless transmission design. Designs, plans and oversees installation and maintenance of wireless radio communications systems, including radio propagation modeling and prediction, microwave path analysis, interference analysis, frequency coordination, cell site equipment layout, parameter definition, and ancillary equipment. Uses skills as a seasoned, experienced professional with a full understanding of industry practices and company policies and procedures. Resolves a wide range of issues in imaginative as well as practical ways. Works on problems of diverse scope where analysis of data requires evaluation of identifiable factors. Demonstrates good judgment in selecting methods and techniques for obtaining solutions. Interacts with senior internal and external personnel.

Small Cell and HetNet related technologies such as: Interference Cancellation

SON, Carrier Aggregation, multi-band Traffic Management, Inter-RAT Interoperability and Enhanced Mobility.

Forward Error Correction (FEC) coding, Coherent and non-coherent detection, Channel equalization, Multiuser Detection (MUD), multiuser scheduling and or media access control (MAC) protocols

In depth working expertise with LTE-FDD, LTE-TDD, UMTS,Small Cells, VoLTE, Spectrum management, Wi-Fi, SON, smart antennas, HetNet cloud and NFV core, Apple and Android devices and applications.

Provide radio optimization, use of ARQ, Hybrid ARQ, PHS and ROHC amongst the techniques that can be implemented.

Experience working with OEM supporting Tier I carrier project for Ericsscon,ALU,and Samsung

Design in-building & outdoor venues deploying Metro Cells/DAS using iBwave software. Analyze existing indoor coverage from macro network using walk test reports from TEMS/JDSU/NEMO to identify the needed coverage & capacity enhancements

design and optimization software such as Ericsson’s software Planet EV, Agilent Technologies wizardTM,, Forsk,Atoll and AIRCOM International ASSETT

Deliver quality indoor RF design by selecting optimum solution considering technology, antenna selection, building layout and affect to macro network

Produce predictions and simulations, and calculate Coverage & Capacity design KPIs using iBwave

Perform RF design link budget analysis

Perform 3D modeling in iBwave.

Optimize systems for interoperability between in-building and macro

Familiar with PCI/PSC planning, Neighbor planning, Interference analysis

Electronics Engineer, ManTech International, Kabul Afghanistan October 2012 – May 2013

Lay out, build, test, troubleshoot, repair, and modify developmental and production electronic components, parts, equipment, and systems, such as computer equipment, missile control instrumentation, electron tubes, test equipment, and machine tool numerical controls, applying principles and theories of electronics, electrical circuitry, engineering mathematics, electronic and electrical testing, and physics.

Read blueprints, wiring diagrams, schematic drawings, or engineering instructions for assembling electronics units, applying knowledge of electronic theory and components.

Test electronics units, using standard test equipment, and analyze results to evaluate performance and determine need for adjustment.

Perform preventative maintenance or calibration of equipment or systems.

Assemble, test, or maintain circuitry or electronic components, according to engineering instructions, technical manuals, or knowledge of electronics, using hand or power tools.

Adjust or replace defective or improperly functioning circuitry or electronics components, using hand tools or soldering iron.

Write reports or record data on testing techniques, laboratory equipment, or specifications to assist engineers.

Determines conditions under which tests are to be conducted and sequences and phases of test operations.

Interfaces and confers with scientific, engineering and technical personnel to resolve testing problems such as product or system malfunctions, incomplete test data, data interpretation or coding issues.

Analyzes and interprets test data and prepares technical reports for use by electronic or software engineering, and management personnel.

Resolves test yield problems by performing analysis of root causes, developing and coordinating corrective action measures and monitoring improvements

Identify and resolve equipment malfunctions, working with manufacturers or field representatives as necessary to procure replacement parts.

Maintain system logs or manuals to document testing or operation of equipment.

Provide user applications or engineering support or recommendations for new or existing equipment with regard to installation, upgrades, or enhancements.

Extensive LABVIEW Experience

Experience with o RF hardware and testing

Programming, troubleshooting and debugging VHDL

Radio Frequency Engineer II, Sprint Nextel, 4G Development, LTE Platform, Reston, VA

October 2010 – October 2012

Provide technical analysis and high level professional and analytical expertise to the Network Development and Engineering Organization. Responsibilities include: evaluation of wireless transmission technologies and impacts to network design; validation and analysis of data collected from field in comparison to theoretical models; providing network coverage and capacity planning that ultimately assists in shaping the network direction; performing engineering feasibility studies to support various deployment scenarios; coordinating and facilitating traffic management features; and coordinating complex projects in a team environment and other related organizations within the company.

In depth working expertise with LTE-FDD, LTE-TDD,UMTS,Small Cells, Voice over LTE, Spectrum management, Wi-Fi, SON, smart antennas, HetNet cloud and NFV core, Apple and Android devices and applications.

Familiar with PCI/PSC planning, Neighbor planning, Interference analysis,

Work closely with the RF Field Analysts, RF Performance Engineers and RF Macro Design Engineers to achieve the network performance objectives.

Physical and link layer design and analysis of wireless communications systems, Multiple-Input Multiple-Output (MIMO), Direct-Sequence Spread Spectrum (DSSS), Orthogonal Frequency-Division Multiplexing (OFDM), Modulation schemes.

Knowledge of LTE and UMTS wireless protocols

Experience with system architectures using network

Design and optimization software such as Ericsson’s software Planet EV, Agilent Technologies wizardTM,, Forsk,Atoll and AIRCOM International ASSETT

Zone optimization by parameter tuning, capacity optimization and hardware troubleshooting to meet KPI target

Experience working with OEM supporting Tier I carrier project for Ericsscon,ALU,and Samsung

HI Path 4000 System Admin / OpenScape Contact Center,

OpenScape Voice Basics and Voice Deployment (OSV or OSCC)

Experienced in designing and developing Java, C# and C++ solutions in Linux/Windows, UML/SDLC and object-oriented design, design patterns, Visual Basic, VB.NET, Python, COM, HTML & JavaScript, PHP, MySQL and PostgreSQL and MATLAB

Identify operational requirements for new systems to inform selection of technological solutions.

Microwave Radio Design Engineer, ITT Corporation, Systems Division, Baghdad Iraq

October 2009-October 2010

Design and develop RF and microwave circuits (including transmitters, receivers and antennas) which will be used in data links. Interact with internal customers and suppliers to understand circuit design requirements, volume constraints and environmental specifications so that the final design is compliant with the design requirements. Provide technical advice and assistance in pursuance of existing and new business, particularly in the fields of RF, Microwave and Antenna Engineering and ensure the effectiveness and competitiveness of the proposed technical solutions

Install, configure, commission, integration and maintenance of analog and digital Microwave or other radio systems.

Install, maintain, and repair of base systems, repeaters, multiplexers, antenna systems, microwave radio systems, network transmission and DC power systems.

Perform daily site surveys, running spectrum analyzers, BER tests and compiling data for specified job sites.

Experience using MATLAB and Simulink

Review schematics, building plans and technical documentation when required.

Occasionally be called upon to perform other duties not included in this job description.

Program, trouble shoot and or perform system diagnostics on communication systems.

Experience in the preparation of engineering specification, design and acceptance testing documentation

Experience in the preparation of engineering scopes, budgets, plans and schedules

Network designing, planning, configuration, splicing and monitoring the Optical Fiber Networks.

design microwave IC’s and integrate mixers

Solid background in Microwave and RF design principles with experience at 8-80 GHz.

Demonstrated ability to integrate RF/uW subsystems with analog, digital and mechanical designs.

Experience with high-frequency circuit design and design tools (AGILANT ADS OR HFSS).

Telecommunications Specialists, United States Marine Corps, Camp Lejeune, NC October 2005-September 2009

Design or configure voice, video, and data communications systems. Supervise installation and post-installation service and maintenance. Install, set-up, rearrange, or remove switching, distribution, routing, and dialing equipment used in central offices or head ends. Service or repair telephone, cable television, Internet, and other communications equipment on customers' property. May install communications equipment or communications wiring in buildings.

Perform telecommunications analysis and develop appropriate system concepts and layouts

Handle responsibilities of designing telecommunications systems including calculations and cost estimating

Prepare technical specifications, review and evaluate shop drawings and product submittal

Handle responsibilities of preparing design analysis and engineering reports

Coordinated with receiving operator in order to exchange transmission instructions effectively.

Counseled personnel about work related issues and assisted personnel to correct job-skill deficiencies which cut back lost labor hours by more than 80%.

Established the VSAT and Radio links for the Standard VISA circuit.

Establish contact with distant stations; processing and logging of messages

Knowledge of VHF/HF/UHF, microwave and optic fiber transmission design

Knowledge of VHF/HF//UHF and microwave radio access design

Knowledge of remote telecommunications site design

broad experts in Avaya PBX, Genesys CTI, SIP/VoIP phones, and call recording technologies

Experience using LMR (Land mobile Radio), GMRS (General Mobile Radio Service) and FRS.

Providing direct engineering support for SPAWAR installed RF and baseband equipment

provide remote and on-site support and troubleshooting for RF architectures

To establish VSAT, Microwave Radio Link communications and LAN networks.

Configured and maintained LAN / WAN networks and Cisco router for

clients.

Radio Frequency Supervisor, United States Marine Corps, Camp Lejeune, NC May 1999 - October 2005

Repair, install or maintain mobile or stationary radio transmitting, broadcasting, and receiving equipment, and two-way radio communications systems used in cellular telecommunications, mobile broadband, ship-to-shore, aircraft-to-ground communications, and radio equipment in service and emergency vehicles. May test and analyze network coverage. Research, design, develop, or test electronic components and systems for commercial, industrial, military, or scientific use employing knowledge of electronic theory and materials properties. Design electronic circuits and components for use in fields such as telecommunications, aerospace guidance and propulsion control, acoustics, or instruments and controls.

Set up and operated ground support and test equipment to perform functional communication tests of satellite and multichannel systems for effective transmission.

Interpreted communications test data to diagnose malfunctions and systemic performance problems.

Maintained and managed the sending, receiving, and safe –guarding over $1 million dollars’ worth of case

Sensitive materials.

Set up and tuning of radio equipment including antennas and power sources

Establish contact with distant stations; processing and logging of messages

Knowledge of VHF/HF/UHF, microwave and optic fiber transmission design

Knowledge of VHF/HF//UHF and microwave radio access design

Knowledge of remote telecommunications site design

providing direct engineering support for SPAWAR installed RF and baseband equipment

Provide remote and on-site support and troubleshooting for RF architectures.

Making changes to frequencies or cryptographic codes; and maintaining equipment at the first echelon.

Conducted periodic equipment inspections and routine test in order to ensure that operations standards are accurate.

Experience using LMR (Land mobile Radio), GMRS (General Mobile Radio Service) and FRS (Family Radio Service) communications (Motorola 2500 to 7500 series - VHF High Band, 2 channels with vibrant-alert)

Perform conceptual systems design, link analysis, hardware trade studies, technical tradeoffs, and costing for military and civilian satellite communications system design concepts.

Radio Frequency Specialist, United States Marine Corps, Camp Lejeune, NC July 1996- May 1999

Receive and transmit communications using radiotelephone equipment in accordance with government regulations. May repair equipment. Design and implement radio frequency identification device (RFID) systems used to track shipments or goods. Research, design, develop, or test electronic components and systems for commercial, industrial, military, or scientific use employing knowledge of electronic theory and materials properties. Design electronic circuits and components for use in fields such as telecommunications, aerospace guidance and propulsion control, acoustics, or instruments and controls

Performed scheduled preventive maintenance tasks, such as checking, cleaning, and repairing equipment, to detect and prevent problems.

Studied blueprints, schematics, manuals, and other publications to determine proper installation procedures.

Monitored and integrated satellite equipment with single channel radio equipment to improve communications.

Set up and tuning of radio equipment including antennas and power sources;

Establishing contact with distant stations; processing and logging of messages;

Making changes to frequencies or cryptographic codes; and maintaining equipment at the first echelon.

Inspected components of Classified and Unclassified equipment for accurate assembly and installation and for defects such as loose connections and frayed wires.

Knowledge of VHF/HF/UHF, microwave and optic fiber transmission design

Knowledge of VHF/HF/UHF and microwave radio access design

Provides technical support for installations and upgrades

Conduct on-site and remote troubleshooting and maintenance assistance for problems that cross multiple systems.

Experience using LMR (Land mobile Radio), GMRS (General Mobile Radio Service) and FRS (Family Radio Service) communications(Motorola 2500 to 7500 series - VHF High Band, 2 channels with vibrant-alert)

Perform conceptual systems design, link analysis, hardware trade studies, technical tradeoffs, and costing for military and civilian satellite communications system design concepts.

Provide technical leadership over engineering and support staff to design, develop, and operate satellite communications systems.

WORK HISTORY

2014-2015 Satellite Communications Engineer

2014-2014 Radio Engineer / Transmission Engineer

2013-2014 Telecommunications Design Engineer III

2012-2013 Electronics Engineer

2010-2012 Radio Frequency Engineer II

2009-2010 Microwave Radio Design Engineer

1996-2009 Telecommunications Specialist

EDUCATION

Colorado State University, Doctor of Philosophy, Systems Engineering May 2013 (Expected Completion 2018)

John Hopkins University, Master of Engineering, Electrical and Computer Engineering, March 2013

George Mason University Bachelor of Science,Computer Engineering and Computer Science, February 2011

College of Southern Maryland Associate of Science in Engineering, Computer Engineering, May 2009

College of Southern Maryland Associate of Science in Engineering, Electrical Engineering, May 2009

CERTIFICATIONS

Cisco Certified Network Associate

Cisco Certified Network Associate-Wireless

Cisco Certified Network Associate-Voice

CompTIA Security + Certification

TECHINCAL TRAINING

Networks:TCP/IP, NT,Active Directory, SMTP,FTP,Cisco,Juniper

Hardware:CPUs,PC,and Server class equipment, routers, switches, printers,NICs

Software: Microsoft,Symentac,

Experience using MATLAB and Simulink

Operating Systems : Novell, Windows ME/NT/XP, Unix/Linux,WLST,ANT, JAVA scripting

DOD network design or operations, Systems Engineering – Systems Life cycle and Systems Engineering Methodology

Knowledge of UNIX (Solaris), LINUX (Red Hat), and Windows Operating System.

Knowledge of Service Oriented Architecture is desired.

Working knowledge of DB and infrastructure (Oracle RDBMS, Operating Systems, Networks, Hardware)

Design or development of SATCOM payload/platform control, spectrum monitoring, network order wire, or SATCOM management systems

Knowledge of the Wide band Global SATCOM system

DOD SATCOM terminal operations, test, or maintenance

Knowledge of satellite operations testing

RF and ADNS, SCIP-IWF, SHF, EHF, CBSP, HSGR, INMARSAT and other systems

Knowledge of LTE and UMTS wireless 3G and 4G Protocols

IP Based Unified Communications (IP PBX, Unified Messaging, Web/Voice Conferencing, SBCs, SIP Trunking)

Data and IP Services (ATM, Frame Relay, VoIP, PIP, VPN)

Managed Network Services (LAN, WAN, Content Delivery, Managed IP PBX)

Call Center Technologies (ACD, IVR, Customer Portal)

SOCIETIES

Member, IEEE Microwave Theory & Techniques, 2006-pres

Member, IEEE Antennas & Propagation, 2006-pres

REFERENCES: References available upon request

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