Senior Network Security Engineer (Top Secret Clearance)

At Lockheed Martin, our Command and Control, Battle Management and Communications (C2BMC) National Team (C2NT) is pioneering the development and integration of cutting-edge technologies to advance the Missile Defense System, safeguarding the United States and its allies. Our collaborative and agile organization operates in a fast-paced environment, driving innovation through tasks such as sensor/weapon integration, algorithm development, user interface development, automated testing, cyber security, enterprise/infrastructure services, and enhancing leading-edge missile defense technologies.

Designs, plans, and validates secure network communications systems for the C2BMC program. You develop detailed specifications, schematics, and capacity forecasts; select hardware/software; implement firewalls, switches, routers, and security relevant devices; and conduct rigorous testing. You apply DoW RMF/CSRMC/STIG compliance, produce required IA documentation, and harden all devices. Work is performed independently under general direction, with critical reviews at key milestones, and you influence long‑range organizational goals by collaborating with senior leadership.

Please Note:

- This position requires a government security clearance; you must be a US Citizen for consideration.

- This position is based at a Lockheed Martin facility in Colorado Springs, CO. The role requires flexibility to travel to alternate work locations as needed.

As leader of the

C2BMC

team, Lockheed Martin directs a partnership of highly responsive industry leaders developing and fielding the backbone of America’s missile defense. Together, this national team supports the design, development, test, integration and fielding of hardware and software elements that enable the Missile Defense System (MDS) to function effectively and continually. You will also have the opportunity to interface with our key customers in the

Missile Defense Agency (MDA)

.

C2BMC|Lockheed Martin

You are a technically proficient network security professional with at least three years of relevant experience (preferably more) and a post‑secondary degree or equivalent training. You combine deep knowledge of networking, OSI/TCP‑IP fundamentals, and DoW security standards to solve complex problems, communicate clearly with diverse audiences, and mentor junior engineers. You thrive in a fast‑paced environment, are willing to support night/weekend events, and can travel to alternate sites such as Schriever Space Force Base.

-Your Health, Your Wealth, Your Life

-Our flexible schedules, competitive pay and comprehensive benefits enable you to live a healthy, fulfilling life at and outside of work.

Learn more about Lockheed Martin's comprehensive benefits package here!

- Network‑security experience.

- An Active Final Top‑Secret U.S. security clearance, with a valid passport, and ability to travel to remote sites.

- Department of War (DoW) Risk Management Framework (RMF) / Cybersecurity Risk Management Construct (CSRMC) and Security Technical Implementation Guides (STIG) Experience

- IAT Level II 8140‑compliant certification (e.g., Security+, GSEC, SCNP, SSCP, CISSP, CISA, GSE, SCNA, etc.). If you don't possess the certification, you must be able to obtain the certification within 60 days of starting.

- Network Fundamentals: Strong grasp of the OSI model, TCP/IP, VLANs, UDP multicast, and ACL design/function.

- Multi‑Vendor Device Expertise: Hands‑on configuration of firewalls (Juniper, Cisco, Palo Alto), routers, and switches (Juniper & Cisco), plus experience with virtualization (VMware/ESXi).

- Proven experience developing cyber‑secure network device configurations and applying DoW STIG compliance and system accreditation processes.

- Ability to design security configurations, testing procedures, and documentation in accordance with NIST CVE and other security‑design methodologies.

- Intermediate to advanced knowledge of security design, development, and testing methodologies; capable of summarizing issues and recommending solutions to leadership.

- Proficient in scripting/automation (Python, Ansible, PowerShell) and familiar with JUNOS routing OS.

- Strong written and oral communication; adept at creating technical presentations and Visio drawings; effective collaborator within high‑performing engineering teams.

- Familiarity with virtualization hardening (VMware/ESXi STIG) and general security‑hardening concepts for a wide range of niche products, software, and applications.

This position requires a government security clearance, you must be a US Citizen for consideration.

Top Secret

By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings.

Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility.

Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits.

4x10 hour day, 3 days off per week

The annual base salary range for this position in California, Massachusetts, and New York (excluding most major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC is $85,500 - $150,765. For states not referenced above, the salary range for this position will reflect the candidate’s final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.

Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays.

(Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year.

This position is incentive plan eligible.

At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work.

With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.

If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on

Lockheed Martin Jobs

, and apply for roles that align with your qualifications.

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