Information Systems Security Engineer (ISSE) / Top Secret / Onsite: FL

Job ID: 708606BR Date posted: Oct. 23, 2025
Description:Lockheed Martin is seeking a seasoned Classified Cyber Security Technologist to join an elite team of cybersecurity professionals. Reporting to the Information System Security Manager(s), you will design, implement, and monitor advanced security solutions that protect classified systems, infrastructure, and high performance computing clusters (HPCC). Your work will drive proactive risk governance, automation enabled operations, and ensure the confidentiality, integrity, and availability of the nation’s most sensitive assets.

Key Responsibilities
•Secure Solution Development – Identify, architect, and deploy specialized applications and tools that meet classified system governance and risk management requirements.
•HPCC Protection – Apply security controls and mitigations to high performance computing environments, safeguarding large scale distributed workloads.
•Automation & Operations – Build and maintain automated cyber security workflows for day to day monitoring, incident response, and compliance reporting.
•Risk Governance – Design and document advanced risk governance processes, supporting proactive security methodologies across enterprise wide classified programs.
•Collaboration – Partner with ISSMs/ISSOs, system engineers, and senior leadership to translate security requirements into verifiable, validated controls.
•Log Management & Analytics – Deploy and tune the ELK stack (Elasticsearch, Logstash, Kibana) for secure log aggregation, analysis, and visual reporting in a classified environment.
•Compliance Implementation – Implement NIST SP 800 53 controls and maintain alignment with DoD security frameworks (RMF, DAAPM, JSIG).
Basic Qualifications:
• DoD 8140/8570 IASAE Level III certification (CISM, CISSP, CISSP ISSAP, CISSP ISSEP, CCISO, etc.)
• Hands on experience in information system security engineering (ISSE) or a comparable cyber security role, specifically supporting HPCC or large scale distributed systems.
• Proven ability to define, verify, and validate security requirements.
• Experience creating, reviewing, and updating system designs and architecture.
• Strong Linux background (RHEL, CentOS, Ubuntu or similar) for system administration, kernel hardening, package management, and security focused configurations.
• Direct experience implementing NIST SP 800 53 security controls.
• Proficiency with the ELK stack for log aggregation, analysis, and visualization in a classified environment.
• Capacity to manage multiple projects in a fast paced, demanding setting.
• Demonstrated skill building effective customer and partner relationships.
• Top Secret clearance, with ability and willingness to obtain TS/SCI w/ Poly
Desired Skills:
• Familiarity with JWICS cyber security requirements and architecture.
• Expertise as an SME in DCSA Assessment and Authorization Process Manual (DAAPM), Joint Special Access Program Implementation Guide (JSIG), or the Risk Management Framework (RMF).
• Recognized cloud proficiency (CSSP, AWS, CSA, CompTIA Cloud+, CCSK, or similar).
• Experience with complex operating systems, data center and cloud environments, cross domain solutions, and NSA Type 1/Commercial Solutions for Classified (CSfC) encryption.
• Prior ISSM/ISSO experience leading teams of ISSOs to meet program security objectives.
• Excellent written and verbal communication skills for interfacing with cognizant security agencies, customers, and senior leadership.
• Advanced Splunk expertise—writing queries, building dashboards, and integrating third party apps (e.g., QMulos).
• Broad understanding of intersecting security disciplines and their impact on information system security.
• Knowledge of network design processes, security objectives, operational goals, and risk mitigation strategies for information systems.
Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: TS/SCI w/Poly
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: CORPORATE HEADQUARTERS
Relocation Available: Possible
Career Area: Cyber Security Engineering
Type: Full-Time
Shift: First