Lead IT Support & Sr. System Administrator

Aber L. Mitchell

850-***-**** • ****.********@*****.*** • Fort Walton Beach, FL 32547

Summary Dynamic IT professional with extensive experience at the Defense Threat Reduction Agency, excelling in Active Directory management and Microsoft Azure support. Proven ability to lead teams, enhance system performance, and implement robust security measures. Adept at troubleshooting complex issues while fostering collaboration and delivering exceptional user support.

Technical Expertise

• Active Directory and Microsoft Entra

• Windows operating systems

• Linux and MacOS

• Cisco networking devices

• VoIP and video conferencing

• Printer and scanner management

• HTML, XML, and JavaScript

• Java programming language

• Virtualization technologies

• Microsoft Azure and PowerShell

• Antivirus solutions and security tools

• BMC Remedy Service Desk

• Microsoft Office applications

• SharePoint Server versions

• Networking protocols and services

Experience 01/2011 - Current

Lead IT Support/Sr. System Administrator, Defense Threat Reduction Agency

(Teksynap Formally Leidos), Eglin Air Force Base, Florida

• Leads and manages organizational helpdesk, networks, and system hardware/software to include transferring computer files between platforms/networks.

• Performs & assist Infrastructure with configuration, management, and troubleshooting for 6 enclave networks (DTRA NIPR/SIPR, Eglin NIPR, SOFnet Green & Red, JIANT, GOLD Net, and AF JWCS Domain Systems).

• Supports PC operations, user & customer support to include desktop support covering hardware/ software, and information management.

• Sets up administrator and service accounts, maintaining system documentation, tuning system performance, installing system wide software and allocating mass storage space for all enclave systems.

• Provides system administrator support for servers functioning as Domain Controller, DNS, DHCP, Print, Distribution, SCCM and ESXi Cloud servers on the Windows Server 2016, & 2022 platform.

• Installing, configuring, maintaining, and disposing of desktops, laptops, thin clients, mobile devices, and peripherals, such as printers, scanners, and labelers.

• Maintaining an inventory of installed software and software licensing to include Virus definition updates. Also assisted in hardening Microsoft and Linux operating system workstations and servers.

• Manages Active directory using Windows Server 2016 & 2019 to include creating users, guest users, and service accounts in Microsoft Entra (Azure Active Directory). Updates, end user accounts, groups, computers, and mailbox accounts in Windows Server 2012 & 2016 to include LDAP configuration providing DTRA users access to AF Global Address Listing.

• Provided Azure Tech Support by assisting customers with their technical issues related to Microsoft Azure services. As an Azure Tech Support, I diagnose, troubleshoot, and resolve customer problems, ensuring seamless and productive experience with Azure cloud services such as Virtual Machines, Subscriptions, Resource Groups, Azure Blob Storage for

(unstructured data, like images, videos, and documents) & Azure Files that can be access by Win, Linux and MAC Operating systems.

• Provides Client System Technician & Cybersecurity duties for Eglin NIPR/SIPR Domain systems as well as provide System Administrator. Performed System Admin & Information System Security Officer (ISSO) duties for AF JWICS & Gold network enclaves in support for Sensitive Compartmented Information (SCI) and Special Access Program (SAP) programs by maintaining the operational security posture of an information system. This includes implementing and managing security controls, conducting risk assessments, and ensuring compliance with relevant policies and regulations. Also including plays a key role in incident response, vulnerability management, and security awareness training.

• Administrative communication support and coordination for various Video Teleconference

(VTC) Systems, to include equipment set-up and user training. Also responsible for Installing, configuring, updating, and deploying 84 VoIP phones.

• IT customer support (helpdesk) functions include monitoring, maintaining, and resolving daily help desk requests. Troubleshooting and repairing hardware and network connectivity issues. Desktop client administration duties for Microsoft Windows 10 workstations.

• Also responsible for the day-to-day maintenance, optimization, and security of Linux-based workstations. This includes installing, configuring, and managing software, user accounts, and security measures in addition to setting up Linux operating systems on workstations.

• Provides COMSEC support as Primary appointed custodian responsible for rekeying, updating, and maintaining 5 Crypto (KG175 Foxtrots) Devices which includes maintaining and rekeying 4 TS Viper Phone devices, 5 Top Secret STE and 2 Secret STE Phones. Also maintains RASKL & SKL keying equipment.

08/2009 - 01/2011

Superintendent, Communications Computer Systems Support, 688th Information Operations Wing, Lackland Air Force Base, Texas

• Managed organizational helpdesk/LAN and system hardware/software.

• Performs configuration, management, and troubleshooting for all operating system environments (as NIPR/, SIPR & JWCS systems).

• Performed, installed, and configured computer equipment, peripherals, hardware, software, upgrades, and system patches.

• Isolates and resolves multi-organizational computer problems and wing local area network

(n/w) deficiencies.

• Conducts daily system diagnostics, troubleshoots, and resolves complex technical computer system malfunction.

• Performs physical security measures and ensures information security implementation for 3K+ wing computers.

• Manages Microsoft SharePoint 2007 structured data and information for a specific purpose in a specific context for collaborative groups of users who must exchange information in pursuit of their shared goals, interests, missions, or business processes.

• Provided Information assurance by implementation and monitoring security measures for 688th Information Operations Wing information systems networks.

• Assisting in the development and execution of security policies, plans, and procedures; design and implementation of data network security measures; network intrusion detections and forensics; information system security incident handling; and certification of Air Force systems and networks.

06/2007 - 08/2009

Lead Technician, Knowledge & Information Systems, 18th Mission Support Group, 18th Wing, Kadena Air Base, Japan

• Managed the Knowledge and Information systems branch and supervised fourteen client support administrator personnel for the 4000-personnel mission support group.

• Diagnosed and resolved data collection technical issues.

• Responsible for installation, and support of operating systems, application software and management of tool software as appropriate and as directed by network operations systems.

• Repaired, troubleshoots, and maintained over $5 million in equipment assets.

• Directly managed Win Servers 2003 Active Directory to support 3,893 group personnel by providing 24-hour integrated help desk services, technical support, and user training.

• Provided information assurance support for 18th Mission Support Group's information Systems/Networks. This includes protecting information and information systems from unauthorized access, use, disclosure, disruption, modification, perusal, inspection, recording or destruction for over 4,000 users.

• Maintained network and computer workstations infrastructure for 4,343 information systems valued at $24 million.

• Served as point for all organizational servers, workstations, peripherals devices and hardware/software support.

03/2006 - 06/2007

Chief, Information Technology, 18th Wing Safety, Office 18th Wing, Kadena Air Base, Okinawa, Japan

• Managed over $60,000 in computer equipment and provided client support administrator duties for five wing offices.

• Procured and configured all computer systems and administered the organizational LAN. Manages system failures quickly to get applications up and running.

• Provided information systems security and implantation of security measure for data access and systems usage.

• Created and maintained user accounts, security global and local group accounts, and computer name accounts. Managed Maintenance Operation Center.

• Troubleshoot and aided on all network, hardware, and software issues for 30 personnel.

06/2004 - 03/2006

Chief, Network Training Center, 18th Communication, Squadron 18th Wing, Kadena Air Base, Japan

• Lead Client Support Administrator for Kadena Air Base, Japan. Supervised six personnel (4 client support admin & two training instructors).

• Provided and managed the creation of training schedules, local training courses, provided guidance and hands-on instruction for three hundred client support administrators.

• Managed the Network Training Center servers, to include Active Directory database, and classroom configurations.

• Developed, scheduled, and technology training courses for the development and advancement of the 200 18th Wings network professionals.

• Managed the Network Training Center's external instructor classroom and configuration setup.

06/2003 - 06/2004

Chief, Information Systems Training, 96th Communications Squadron, 96th Air Base Wing, Eglin Air Force Base, FL

• Provided Client Systems Administrator technical training to 190 client system personnel on Eglin AFB.

• Provided training support for five Wings with forty-five associate organizations.

• Trained information technology personnel in computer troubleshooting, repair & upgrading, and setup of LAN/WAN & internet access.

• Instructed Client Systems Admins on installation Operating Systems & Network Operating systems, how to setup a File, Print, and Web Server, how to configure routers, switches & hubs to the network and e-mail servers (Exchange Server 5,5/2000/2003/2008).

06/2001 - 06/2003

Chief, Information Systems Management & Training, 96th Communications Squadron, 96th Air Base Wing, Eglin Air Force Base, FL

• Performed maintenance on organization's LAN/WAN systems.

• Provided client support administrator duties in installation, troubleshooting, and maintenance of antivirus software, three different desktop operating systems, and multiple application software to organization's personnel and external customers.

• Controlled user access to the network resources for 290 users.

• Responsible for training web administrators, creating, editing, and managing organizations' web pages.

• Supervise six information managers to support the organization's IT needs for computer repair/upgrade, network connectivity, information security, and router/port access in/out of the organization's LAN.

06/2001 - 06/2002

Computer Repair & Helpdesk Technician Support (Part-Time Job), Cybertron Internet Service Provider, Fort Walton Beach, FL

• Performed troubleshooting for computer hardware, software, and the network.

• Installed new software on users' computers.

• Cleaned, modified, and repaired computer software/hardware including monitors, keyboard, and printers.

• Evaluated company hardware and software and provided excellent Helpdesk service to all customers.

08/1997 - 06/2001

System & Network Administrator/Management Instructor, 96th Communications Squadron, 96th Air Base Wing, Eglin Air Force Base, FL

• Provided technical training to over 120 of Eglin Air Force Base's Information Manager Personnel.

• Provided software installation instructions on Norton anti-virus, Microsoft applications, and various operating systems.

• Provided hand-on training in hardware, software, network installation, maintenance and troubleshooting support for LANs and WANs.

• Provided PC support for my organization needs such as hardware & software upgrades on operating systems, applications, and anti-virus installation.

• Provided alternate systems administrator support in creating and managing user profiles and groups in Windows NT Server/Server 2000.

07/1996 - 08/1997

Chief, Information Management, 25th Fighter Squadron, 51st Fighter Wing, Osan Air Base, South Korea

• Managed the command and maintenance section for information management and supervised two information managers.

• Managed the Personnel Concept III computer information database and automated records information management account database computer.

• Used electronic records information management systems software to control and distribute electronic file maintenance and disposition.

• Managed small peer LAN for sharing popup messages and files to workers, supervisors, and commanders in the organization only.

02/1994 - 07/1996

Computer Information Manager, 81st Maintenance Squadron, 81st Training Wing, Keesler AFB, MS

• Managed and provided information management support to twenty work centers.

• Performed duties such as posting electronic incoming publications to shared file servers.

• Managed permissions to file server resources, reports, documents, and databases.

• Installed and managed Microsoft Windows 95 electronic messaging program incoming and outgoing messages for the organization.

• Operated the Personnel Concept III computer system to provide unit personnel with access to accurate data and other information.

12/1992 - 02/1994

PC Information & Maintenance Manager Specialist, 57th Fighter Interceptor Squadron, 35th Fighter Wing, Keflavik Naval Air Station, Iceland

• Responsible for processing and converting electronic documents from Word Star to Office for Windows Word.

• Responsible for updating all 6 systems with Office for Windows applications suite.

• Managed permissions to file server resources, reports, documents, and databases.

• Managed the webpage using mosaic browsers for the 57th Fighter Interceptor Squadron.

• Performed monthly maintenance on all 6 systems in the unit by running disk check, scandisk, and file check on DOS 6.22 and Windows 3.1 systems.

01/1991 - 12/1992

Asset Chief, Information Management, 27th Services Squadron, 27th Fighter Wing, Cannon Air Force Base, NM

• Developed and implemented communication and information management procedures to control electronic files and programs including electronic messaging distribution, unit suspense programs, and administrative procedures on Wang, SIMS, and DOS systems.

• Supported unit programs using Dbase5 and Office for Windows 3.1. 01/1990 - 01/1991

Information Management Specialist, 8th Mission Support Group Morale, Welfare And Recreation, Kunsan Air Base, South Korea

• Managed and updated DOS batch files programs on CTR systems.

• Provided software support for the record information management system (RIMS) for fifteen personnel.

• Directly supported DOS-based programs such as Word Star, Peach Text, dBase, Harvard Graphics, Created DOS shells for 4-386 computer systems, also supported the 8th Fighter Wing PC on occasion.

12/1987 - 01/1990

Computer Communication Specialist, AF Electronic Warfare Center Electronic Security Command, Kelly Air Force Base, TX

• Responsible for accurately managing/updating DOS batch files on Wang & Zenith 100 systems.

• Completed tracking and accounting of Top Secret and Secret encrypted electronic files.

• Managed use of programs such as Word Star, Peach Text, dBase, Harvard Graphics, 286, 386, and DEC Computing systems.

• Managed incoming and outgoing letters, messages, detailed reports, and other electronic correspondence using word processing systems.

• Installed and Maintained Windows 3.1 and Dos 6.22.

• Performed and provided support as division's equipment supply custodian.

Education:

Associate Of Science Degree, Computer Information Science Northwest Florida State College, Fort Walton Beach, FL 02/2000

Associate Of Science Degree, Information Management Community College Of The Air Force, Montgomery, AL

Current Certifications

• COMPTIA Security + Certified, 08/2009, 01/2027, Unitek Training Center, Fairmount, CA

Microsoft Azure Fundamentals - AZ-900 Certification, Training Camp, Fort Walton Beach, FL

Emails Personal: ****.********@*****.***

Professional: ****.*.********.***@****.***

References Available upon request

Training

• Microsoft Azure Fundamentals Training, 04/28/2025

• Cybersecurity - Fundamental of Malware Analysis and Remediation

• DOD Cybersecurity Policy, 03/26/2025

• Introduction to Cyber Operations, 08/12/2024

• Cybersecurity Systems Analyst - Threat Monitoring, 08/01/2023

• Cybersecurity and Network Fundamentals, 07/27/2023

• Updating to Server 2019: PowerShell for Windows Server, 07/17/2023

• Microsoft Azure Fundamentals: Managing Azure AD, 06/15/2023

• COMPTIA A+ Essentials and Information Technology course, 05/2022

• Cisco Inter VLAN Routing, 07/09/2021

• CompTIA Cybersecurity Analyst and Monitoring, 08/01/2023

• CEHv10: Ethical Hacking Overview and Treats, 11/21/2021

• Windows Server 2016, Installing and Configuring Network, 03/2021

• COMPTIA Server + course, 10/2021

• COMPTIA Network + course, 08/2021

• Windows 10: Configuration Systems and Data Recovery Training, 01/21/2021

• Windows 10: Monitor and Manage Windows, 01/22/2021

• Client Support Administrator Instructor Course, 01/2021

• Cisco Certified Network Assistant (CCNA), 01/2019, University of Maryland

• Windows Server 2016 Active Directory Course, 03/2022

• COMPTIA Linux + Course, 07/2016

• Cisco Certified Network Administrator Course, 05/2015

Phone Numbers

WP: 571-***-****,

HP: 850-***-****

Cell-Ph; 850-***-****

Security Clearance

Top Secret/SCI, 11/2029

Contact this candidate