Network Engineer

DAVID GERRY

***** *. ****** **** ***'s Summit, MO. 64086

***********@*******.*** / 816-***-****

SUMMARY

I am a Senior Network Professional with over 30 years of experience in network engineering, IT security, and virtualization. I specialize in designing, securing, and optimizing complex networks using industry best practices. Skilled in leading large-scale projects, managing IT infrastructure, and implementing security protocols, I have a proven track record of driving efficiency, innovation, and continuous improvement. My expertise includes Cisco networking, Palo Alto firewalls, F5 load balancers, disaster recovery, and strategic technology planning. I excel in collaborating with vendors, stakeholders, and teams to deliver solutions that align with business objectives.

SKILLS

IT Security Leadership & Management

Strategic Planning & Risk Management

Technology Infrastructure & Integration

Project & Program Management

Corporate Communications & Compliance

System Design & Fault Tolerance

Disaster Recovery & Business Continuity

Service Level Agreement (SLA) Management

Talent Development & Team Building

Process Engineering & Quality Improvement

Research & Development (R&D)

Business Intelligence & Data Warehousing

System Conversions & Integration

Innovation & Technical Solutions

EXPERIENCE

Principal Network Analyst / Oracle – US – 100% Remote 04/2025 – 03/2026

Part of SOE SaaS Oracle Cloud Infrastructure Networking team. Worked with ((Infrastructure as a service) IaaS), ((Software as a Service) SaaS), ((Load Balancer as a Service) LBaaS), ((Oracle Fusion apps as a service)FaaS).

Design, implement, and optimize network solutions based on client needs and evaluate and recommend new networking technologies and equipment.

Assess current network capacity, forecast network traffic, and recommend upgrades or changes as necessary.

Involved in the implementation of LACP configuration on Cisco switches and possessing understanding of OCI architecture.

Executing OS upgrades or replacements for critical F5 Load Balancers, and Cisco Nexus Devices in a complex environment, ensuring no service disruptions during maintenance windows.

Implementing configuration changes in Juniper Leaf, fabric, and Spine Architecture using GIT bash, Bit Bucket, Bamboo, and automation processes in an AD environment.

Monitor network performance and troubleshoot issues to ensure optimal operation and utilize tools to analyze network traffic and identify bottlenecks or potential threats.

Lead projects and mentor junior analysts or team members.

Keep abreast of new technologies and industry trends.

Staff Network Engineer / Wellsky - Overland Park, Kansas. 03/2022 – 04/2025

As a Staff Network Engineer at Wellsky, I manage and optimize a wide range of network infrastructure, including firewalls, Cisco switches, Meraki wireless, and GPON solutions, while handling various networking tasks to support business needs.

Firewall & Security Management: Configured and managed F5 sprayers, FMC Cisco 2120/2130 FTD, and Palo Alto firewalls to ensure secure network operations.

Network Infrastructure Support: Administered Cisco switches (3850, 2960, 3650, Nexus 9K/5K/FEXs) for reliable and scalable network connectivity.

Wireless & GPON Solutions: Designed and maintained Cisco Meraki wireless and Zhone GPON switches, supporting seamless communication across locations.

Collaborative Problem Solving: Led troubleshooting efforts for complex network issues, working with cross-functional teams to minimize downtime and ensure high availability.

Senior Network Engineer / Cerner - Kansas City, Missouri. 04/2020 - 03/2022

Network Security & Configuration: Managed and configured F5 Sprayers, Cisco routers/switches, and Palo Alto firewalls, ensuring secure and efficient network operations.

VA & DOD Network Interaction: Worked on network integration projects involving VA and DOD systems, ensuring seamless connectivity and compliance with security protocols.

Infrastructure Changes & Maintenance: Performed infrastructure changes and updates to network and security systems, ensuring optimal performance and security posture.

Clearance & Compliance: Held a Secret/Public Trust clearance (ADP IT-II Level Access) through Leidos, ensuring compliance with government security standards (STIGs).

Network Engineer / K12ITC/Menlo Inc - North Kansas City, Missouri. 01/2020 - 03/2020

Network & Security Configuration: Managed infrastructure changes and configurations for network and security systems, ensuring efficient and secure network operations.

Cisco Meraki Solutions: Worked extensively with Cisco Meraki switching, routing, firewalling, and wireless configurations via the Meraki Dashboard to optimize network performance.

Network Monitoring & Troubleshooting: Utilized PRTG for network monitoring, proactively identifying and resolving issues to ensure minimal network downtime.

Advanced Networking Protocols: Implemented and supported multicast routing and Bonjour services, enhancing network performance and enabling seamless communication across devices.

Senior IT Engineer / United Biosource Corp - Overland Park, Kansas. 09/2019 - 01/2020

Firewall & Security Management: Managed Cisco Firepower 2120, 2130, and 5008 FTD firewalls, as well as Checkpoint firewalls and their management consoles, ensuring strong network security policies and protection.

Network Infrastructure & Configuration: Performed configuration and infrastructure changes on various network devices, including Cisco ISR routers (1002, 4451), Catalyst switches (3850, 2960), Nexus 5K/6K/9K, and F5 LTM 4800 load balancers.

DNS, DHCP, and IPAM Management: Utilized Infoblox iDNS/DHCP/IPAM for IP address management and DNS services, ensuring efficient and accurate network service operations.

Network Monitoring & SIP Routing: Implemented and maintained network management tools like SolarWinds, while assisting in the setup of SIP routing for Avaya phone Pod systems to enhance communication capabilities.

Network Systems Administrator III / Sprint - Kansas City, Missouri. 04/2019 - 08/2019

Network Infrastructure & Configuration: Performed multiple configuration and infrastructure changes on network devices, including Juniper Spine switches (10008), Leaf switches (5150), and Cisco 2K FEX's, ensuring optimal network performance.

Security & Firewall Management: Managed ASA 5585 firewalls with Sourcefire and Firepower 4120 ASA Next-Gen Security appliances, enhancing the security posture and protecting critical network resources.

Advanced Routing & Switching Support: Supported and maintained Cisco Nexus 6001 switches, ensuring reliable traffic flow and efficient network segmentation for the enterprise environment.

Collaboration & Troubleshooting: Worked closely with teams to identify and resolve network issues, implementing corrective actions to minimize downtime and ensure system availability.

Network Engineer / Contract position with Germania Insurance - Brenham, Texas. 02/2019 - 04/2019

Network & Security Infrastructure Upgrades: Led network and security infrastructure upgrades, including the migration from Cisco ASA firewalls to Palo Alto firewalls, enhancing the overall security posture.

Business Continuity & DR Solutions: Assisted with the design and build-out of Colocation, Business Continuity, and Disaster Recovery (DR) solutions, ensuring high availability and disaster preparedness.

Load Balancing & Traffic Management: Configured and deployed F5 LTM (i4600/i2006) load balancers to optimize application performance and manage traffic effectively across the network.

Security & Wireless Configuration: Supported Forcepoint/Websense email security, Mimecast email protection, and adjusted Aruba Wi-Fi configurations, while also configuring new Dell switches for the DR site to ensure seamless failover capabilities.

Senior Network Engineer – Information Security Engineer, Wireless, Wireless admin/ Engineer / DST/Argus Health Systems, Kansas City, Missouri 05/2007 - 06/2018

Designed and Developed Network Topologies: Created both wired and wireless network topologies, establishing security standards and plans for enterprise-wide implementation.

Upgraded VPN Infrastructure: Led the migration of Associate and Client Access VPNs from Cisco Concentrators to Cisco ASA firewalls, enhancing security and performance.

Firewall Upgrades & Cutover: Assisted in the transition from Cisco PIX firewalls (515/525) to Cisco ASA 5500 series and later to Palo Alto 5220 firewalls for improved network security.

Network Equipment Configuration and Deployment: Built out and configured Cisco Nexus switches (1K, 2K-FEX, 5K, 7K, 9K), Cisco routers (7200, 4400, 4300 series), and F5 LTM for optimized network performance and scalability.

Security Protocol Implementation: Installed and managed Cisco 4240 IDS/IPS systems on both wired and wireless networks, ensuring robust security and traffic monitoring.

Advanced Wireless Network Management: Designed and implemented secure wireless networks using WPA2 with LEAP/PEAP authentication and supported various signal types (2.4GHz/5GHz) with optimal bandwidth.

Proof of Concept for AWS VPC: Created and deployed a Proof of Concept for a Virtual Private Cloud (VPC) on AWS, ensuring HIPAA compliance and secure cloud infrastructure integration.

Supervisor/Senior Traffic Analyst / Retired U.S. Navy/Reserves – (NSA-CSS) – (Dept. Homeland Security) Cryptologic Technician Technical, 09/1979 - 12/2009

Telecommunications and Signal Analysis: Conducted microwave, satellite, and digital signal analysis, utilizing UNIX, Sun Microsystems, MicroVAX, Hewlett Packard, and Honeywell systems.

Database and WAN Integration: Managed large databases and linked various signal analysis systems (Univac, Sperry) to a WAN through a Mainframe (VMS/MVS).

Technical Training and Programming: Completed training in FORTRAN, COBOL, Pascal, and Basic programming, with basic experience in TCP/IP and Active Directory management.

Leadership and Security Management: Managed and trained Naval Security crews on a rotating schedule, requiring a TOP SECRET/SBI Code word clearance.

Awards and Recognitions: Received three National Defense Medals, two Meritorious Unit Commendation Medals, six Good Conduct Medals, and an Overseas Service ribbon for seven years of overseas duty.

Lead Network Technical Support Analyst / DST Systems Inc - Kansas City, Missouri 12/2003 - 05/2007

Tier One Network Troubleshooting: Provided call center support for network issues, troubleshooting Cisco routers, switches, PIX, and Checkpoint firewalls.

Enterprise Network Monitoring: Monitored enterprise network performance, ensuring uptime and troubleshooting connectivity issues.

Mainframe Systems Support: Managed password resets and troubleshooting for TSO, ISPF, and SDSF areas on OS390 Mainframe.

Circuit Connectivity Troubleshooting: Diagnosed and escalated issues for various circuit types, including T1, DS1, DS3, ISDN, Frame Relay, ATM, and MPLS.

EDUCATION AND TRAINING

09/24/2018 – 12/07/2018

CENTRIQ Training – Kansas City, Missouri

Attended intensive boot camp courses, including:

Certified Information Systems Security Professional (CISSP)

CompTIA Cloud+

Certified Network Defender (CND)

ICND1 v3 CCNA – Routing & Switching, Part 1

ICND2 v3 CCNA – Routing & Switching, Part 2

03/07/2018 - 03/09/2018

F5 BIG-IP Training

Attended courses focused on:

Troubleshooting BIG-IP LTM v12 (March 9, 2018)

Configuring BIG-IP APM v12 (March 7, 2018)

Configuring BIG-IP LTM v12 (October 9, 2017)

TECHNICAL SKILLS

NETWORKING & INFRASTRUCTURE

Networking: Cisco Switches (Catalyst, Nexus), Routers, and FEXs; Troubleshooting and Installation

Firewalls & Security Devices: Checkpoint, Cisco ASA, Cisco Firepower, Cisco IDS/IPS 4240

Load Balancers: F5 LTM/GTM, GSLB NSX

Disaster Recovery: Cisco Switches, Routers, Checkpoint & Cisco ASA Firewalls, F5 LTM/GTM

Network Access Control (NAC): Cisco ISE

Virtualization: Citrix, vSphere Firewall Access

DATABASE &OPERATING SYSTEMS

Databases: IBM DB2, SQL Server

Operating Systems: Windows Server (2000 & up), Windows 3.1 & up, OSX (7.4 & up), AIX, UNIX, Linux

SECUIRITY & COMPLIANCE

Security Tools: Mobile Device Management, Content Filtering (Bluecoat), Multi-Factor Authentication

Intrusion Defense & Prevention: Cisco Firepower, Cisco IDS/IPS 4240

Vulnerability Scanning: Nexxus, Qualys (perimeter & internal), White Hat application vulnerability scanning

Penetration Testing: Metasploit, Qualys, White Hat

Frameworks & Standards: NIST, PCI-DSS, HIPAA, ITIL

MANAGEMENT & MONITORING

Privileged Account Management: CyberArk

Change Management: Remedy

Project Management: MS Project, Visio, Systems Development Life Cycle (SDLC)

MICROSOFT OFFICE & TOOLS

Office Suite: Microsoft Word, Excel, Access, PowerPoint, Outlook Express, Visio

Web Browsing & Communication: Internet Explorer

REFERENCES

Stephen J. Johnson

Senior Network Engineer

NIC/eGov

Phone: 913-***-****

Email: ************@*******.***

John Mutti

Manager, Network Delivery

DST Systems Inc. / SS&C

Phone: 816-***-****

Email: *********@*****.***

Gary Tanderup

Lead Network Engineer

Argus Health Systems

Phone: 816-***-****

Email:*********@*****.***

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