Network Engineer, Sr​/Secret​/Onsite: TX or GA

Job Overview

This position is to join the Classified Network Operations Team supporting LM Aeronautics in either Fort Worth, TX or Marietta, GA. The role supports classified network infrastructure, covering maintenance, troubleshooting and daily operations across all lines of business at Lockheed Martin Aeronautics, including ADP, IFG, and the Joint Strike Fighter Program (JSF).

• Maintain and troubleshoot classified network infrastructure for all lines of business.
• Administer hardware appliances such as Cisco switches, Palo Alto and Juniper firewalls, and Type‑1 encryption devices with a focus on collaboration components.
• Support networking tools including Cisco ISE, Cisco DNA Center, and Cisco Call Manager (CUCM).
• Plan and execute infrastructure upgrades, equipment installation, and cabling.
• Provide ongoing support and resolve network‑related issues in a fast‑paced environment.

• Active Secret clearance (with the ability to obtain Top Secret clearance).
• Experience with configuration and management of Cisco switches and CUCM.
• Experience with Cisco Call Manager and Jabber.
• Experience with configuration and management of Juniper or Palo Alto firewalls.
• Minimum 5 years’ experience with TACLANEs (e.g., KG175s / KG250).
• Strong knowledge of the OSI model, IP addressing, and subnetting.
• 5+ years’ experience supporting and resolving network‑related issues.
• Effective communication with Classified Network Operations team members.
• Current CompTIA Security+ (or other DoD 8570.01) certification, or ability to obtain it.
• Demonstrated ability to provide customer‑focused support and build strong relationships with customers and key stakeholders.
• US citizenship.
• Capable of lifting 30 pounds.

• Active Top Secret clearance.
• General knowledge of DISA STIGs and hardening methods.
• Experience supporting multi‑site architecture.
• Palo Alto PNCSA or Juniper JNCIA/JNCIS certification.
• Familiarity with Software‑Defined networking (Cisco ACI, Cisco DNA Center, etc.).
• Experience configuring and troubleshooting LAN and WAN connections.
• Ability to create and update network diagrams using Microsoft Visio.

Requires Top Secret clearance and US citizenship.

Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.

Full‑time, on‑site with a 4×10 hour day, 3 days off per week (Mon‑Thu or Tue‑Fri), rotating on‑call support, occasional travel.