Cyber System Security Engineer Sr

Job ID: 723772BR Date posted: Apr. 20, 2026
Description:Company Overview: At Lockheed Martin, we unite passionate individuals to drive purposeful innovation, ensuring safety and solving the world's most complex challenges. Our team comprises some of the brightest minds in the industry, making Lockheed Martin an exceptional place to work. We prioritize our employees by offering diverse career opportunities that promote development and agility. With flexible schedules, competitive pay, and comprehensive benefits, we empower our employees to lead healthy, fulfilling lives both at work and beyond. At Lockheed Martin, we emphasize innovation, integrity, and corporate responsibility. Your mission is ours.

Key Responsibilities:

The Cyber Systems Security Engineer Sr will be responsible for working with the team of fellow engineers in the designing, assembly, integration, and maintenance of a like family of different Command and Control (C2) System of Systems. This includes network planning, hardware installation, software integration support, verification, and validation of system functionality.

In addition to designing and building the systems, the applicant will be responsible for ensuring the system is NIST/RMF/JSIG compliant and assist in the submitting of an ATO package.

They will be involved in solving complex problems associated with both the hardware and software systems. Work will also include modification, and maintenance of system drawings (network architecture, layout, cable drawings, rack drawings).

• Perform and manage system integration, test and troubleshooting of various hardware/software configurations

• Installing, and managing of equipment in server racks and updating the inventory

• Establish Hardware-In-The-Loop (HWIL)/Closed-Loop development and testing with the Integration team

• Participate in technical exchange meetings, interface with customers (internal/external) and contributing to a broad range of program deliverables.

• Integrating hardware from sub-system teams, interface with other elements, and the system and segment level teams

• Maintain design documentation and follow configuration management requirements

What’s In It For You:

We offer flexible work schedules to comprehensive benefits investing in your future and security, Learn more about Lockheed Martin’s comprehensive benefits package here.

Must be a US Citizen.; This position will require a government security clearance.; This position is located at a facility that requires special access.
Basic Qualifications:
Proven experience with enterprise‑grade security platforms.
Strong background in operating systems, including Windows Server and Linux distributions (RHEL)
Hands‑on expertise with VMware virtualization technologies.
Solid understanding of networking fundamentals, particularly routing and switching protocols and architectures
Demonstrated ability to perform system hardening, vulnerability remediation, and security configuration management
Experience providing end‑user support and responding to security incidents
Willingness and availability to provide after‑hours or on‑call support as needed.
Holds an active Secret clearance (investigation or CV ≤ 5 years) and is eligible to obtain a Top‑Secret clearance.
DOD 8570 certifications such as CompTIA Security+, CASP, CISSP or CCNP-Security."
Desired Skills:
Capable of completing any additional enhanced security reviews required by government contracts; must acquire and maintain all necessary program clearances within a timeframe that satisfies Lockheed Martin’s operational needs.
Bachelor’s degree from an accredited institution in a relevant discipline or an equivalent combination of education and at least five years of professional experience.
Proficient with enterprise security and network‑monitoring tools (e.g., Splunk, Trellix ePO, ACAS/Tenable.sc, Tanium, Microsoft Sentinel) to detect, respond to, mitigate, and report cyber incidents.
≥ 5 years experience administering Windows operating systems (Server 2016/2019, Windows 10/11, etc.) and Linux platforms (Red Hat Enterprise Linux, IBM/AIX, etc.).
Hands‑on experience with virtualization technologies such as VMware, Horizon, vSphere, vCenter, vSAN, and Hyper‑V.
Strong understanding of routing and switching protocols and overall network architecture.
Experience in vulnerability remediation and security management, including system hardening, log management, and configuration control using tools like Nessus, McAfee, WSUS, Shavlik, Blade Logic, Splunk, ACAS, SCAP, and HBSS.
Ability to move, rack, stack, and install hardware (lifting capacity up to 30 lb).
Familiarity with core infrastructure services: Active Directory, DHCP, DNS, Group Policy, and WSUS.
Proven track record installing software, providing technical support, and maintaining accurate documentation.
Experience delivering end‑user support and performing incident‑response activities.
Willingness and availability to provide after‑hours or on‑call support as required.
Knowledge of Information Assurance (IA) hardening and compliance frameworks (e.g., STIG, DSS), including related documentation.
Experience with NAS, SAN, and PFS storage systems and their associated networking.
Demonstrated ability to design and implement network architectures with deep expertise in routing and switching concepts.
Scripting skills to automate system administration tasks (Ansible, Python, Bash, Perl, Batch, VBScript, PowerShell, etc.).
Experience with environment‑management solutions (Splunk, McAfee ePO, vSphere, Azure, etc.).
Hands‑on experience in cloud environments such as Azure or AWS.
Understanding of SQL or other database technologies and the ability to work with them.
Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: Secret with Investigation or CV date within 5 years
Other Important Information You Should Know
Expression of Interest: 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.
Ability to Work Remotely: Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility.
Work Schedules: 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.
Schedule for this Position: 4x10 hour day, 3 days off per week
Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.
The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration.
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.
Experience Level: Experienced Professional
Business Unit: AERONAUTICS COMPANY
Relocation Available: Possible
Career Area: Cyber Security Engineering
Type: Full-Time
Shift: First