Senior Cybersecurity Engineer / Site Lead

Job Title: Senior Cybersecurity Engineer / Site Lead
Location: Linthicum Heights, MD — 100% onsite
Clearance: Active Top Secret required; SCI eligibility required; TS/SCI preferred
Certification: CISSP required for the Key Personnel candidate
Employment Type: Full-time; contingent upon contract award
Program: DoD Defense Cyber Crime Center Systems Engineering and Technical Advisory Support

Position Summary

Apotheosis is seeking a Senior Cybersecurity Engineer / Site Lead to serve as the proposed Key Personnel and team lead for a DoD cyber mission support program at the Defense Cyber Crime Center in Linthicum Heights, Maryland. The selected candidate will lead a cleared SETA team providing cybersecurity engineering, cyber operations analysis, architecture support, test engineering, process improvement, R&D technical support, and technical project management across DC3 mission areas.

The Government requires one Senior Cybersecurity Engineer to be identified as Key Personnel/team lead within both the base-year and option-year staffing structure, and the Key Personnel resume is a gate requirement for proposal evaluation.

Responsibilities

• Lead the onsite contractor technical team and serve as the primary day-to-day technical interface with the Government COR and mission stakeholders.
• Provide systems engineering and cybersecurity analysis across DC3 enterprise systems, tools, and mission capabilities.
• Support architecture analysis, modernization recommendations, operational/system view updates, integration planning, and technical standards alignment.
• Support cyber operations analysis, including structured analysis, intelligence-informed technical assessments, gap identification, and production of actionable technical findings.
• Participate in root-cause analysis, corrective-action planning, and problem management for recurring technical issues.
• Support change management, release planning, configuration control, integration, sustainment, and transition of new or modified capabilities.
• Support test engineering activities, including developmental testing, operational testing, automated test planning, failure analysis, risk assessment, and corrective action tracking.
• Develop and review technical reports, specialized reports, briefings, schedules, risks, action trackers, and decision-ready recommendations.
• Ensure team compliance with contract performance expectations, including workforce stability, deliverable timeliness, technical quality, and vacancy controls.
• Maintain a cohesive, mission-focused team capable of supporting short-notice and ad hoc Government tasking.

Required Qualifications

• Active Top Secret clearance.
• SCI eligibility at time of proposal submission/performance; TS/SCI strongly preferred.
• CISSP certification.
• Experience leading cybersecurity engineering, systems engineering, SETA, cyber operations, or cyber mission-support teams in DoD, IC, law enforcement, or counterintelligence environments.
• Experience with RMF, cybersecurity architecture, vulnerability/risk analysis, cybersecurity tool integration, continuous monitoring, test engineering, DevSecOps/agile methods, and technical documentation.
• Ability to work onsite full-time in Linthicum Heights, Maryland.
• Strong communication skills and ability to produce clear, actionable technical recommendations for Government stakeholders.

Preferred Qualifications

• Prior DC3, AFOSI, DoD cyber, law enforcement, counterintelligence, digital forensics, or intelligence-community experience.
• Experience supporting technical exchange meetings, cyber R&D, capability assessments, vendor market surveys, field demonstrations, and mission-partner coordination.
• Experience with DoD/AF acquisition, JCIDS, PPBE, DoD 5000-series processes, SAFe Agile, PMBOK, and DoD systems engineering guidance