Sr Cyber Engineer (ISSE)

Lyntris is a defense technology company that connects sensing to action across the connected battlespace. Lyntris brings together the talents of Accelint and Vitesse teams under one mission, with each contributing deep expertise within their domain. Combining differentiated hardware, software and mission expertise, Lyntris helps customers sense threats, make sense of complex conditions and act with greater speed, precision and confidence in contested environments.

Lyntris supports U.S. and allied defense organizations across every branch — including Navy, Army, Air Force, Space Force and allied partners — spanning strategic, operational and tactical missions and every domain: Space, Air, Land, Sea and Cyber. With more than 200 active defense programs, Lyntris works at every level of the mission, from national command authority to the tactical edge.

Solutions are designed by operators who understand the mission, engineered for the conditions that degrade or defeat standard systems, and built on an open, modular architecture that integrates into existing programs without requiring them to start over. Lyntris moves faster than the traditional defense cycle — with integrated design, build and test capabilities in-house — and delivers systems that sustain and endure long after initial fielding.

We are seeking an Information Systems Security Engineer (ISSE) / Cybersecurity Engineer to support Risk Management Framework (RMF), cybersecurity engineering, Assessment & Authorization (A&A), vulnerability management, and compliance activities across multiple Department of the Navy (DON) systems and programs. This position will serve as a key cybersecurity advisor to program leadership, engineers, Information System Security Managers (ISSMs), and stakeholders throughout the system lifecycle to ensure systems achieve and maintain authorization while meeting cybersecurity requirements.

The ideal candidate will possess extensive experience with RMF implementation, cybersecurity engineering, vulnerability assessments, accreditation activities, and compliance management within Department of Defense (DoD) environments. This role requires the ability to coordinate across multiple technical teams, manage authorization schedules, evaluate system architectures, and provide cybersecurity expertise throughout system development, testing, deployment, and sustainment activities.

Duties & Responsibilities

• Serve as the Information Systems Security Engineer (ISSE) supporting Risk Management
• Framework (RMF), Assessment & Authorization (A&A), cybersecurity compliance, and continuous monitoring activities throughout the system lifecycle for DoD programs and systems.
• Develop, maintain, and assess cybersecurity policies, procedures, security documentation, authorization artifacts, and compliance records in accordance with NIST, DoD, NAVWAR, and CNSSI requirements, leveraging tools including eMASS, VRAM, DADMS, and DITPR-DON.
• Conduct cybersecurity risk assessments, vulnerability analyses, security control evaluations, and remediation activities; support IAVM compliance, ACAS scanning, deficiency tracking, corrective action planning, and continuous authorization readiness.
• Collaborate with program managers, ISSMs, engineers, development teams, test organizations, and government stakeholders to integrate cybersecurity requirements into system design, development, testing, configuration management, and operational planning activities.
• Evaluate COTS, GOTS, open-source technologies, Cross Domain Solutions (CDS), PPSM requirements, and engineering changes to determine cybersecurity impacts, authorization requirements, and compliance with RMF and security control standards.
• Coordinate RMF schedules, security assessments, technical baseline reviews, modernization initiatives, and lifecycle cybersecurity activities while providing status reporting, risk mitigation recommendations, and accreditation support to leadership and program stakeholders.

Required Qualifications

• Bachelor’s degree in Cybersecurity, Information Assurance, Information Technology, Computer Science, Engineering, or a related technical field.
• Minimum of 8+ years of cybersecurity, RMF, information assurance, or cybersecurity engineering experience supporting DoD or Federal programs.
• Lead Information Systems Security Engineering (ISSE) and Risk Management Framework (RMF) activities across the system lifecycle, including system categorization, security control implementation, Assessment & Authorization (A&A), continuous monitoring, and accreditation support.
• Develop, maintain, and review cybersecurity policies, procedures, CONOPS, SOPs, authorization packages, and compliance documentation while ensuring alignment with DoD, NIST, NAVWAR, and Information Assurance requirements.
• Conduct cybersecurity risk assessments, vulnerability analyses, security control evaluations, and remediation planning; manage vulnerability tracking and compliance activities using tools and repositories including eMASS, VRAM, ACAS, DADMS, and DITPR-DON.
• Collaborate with program managers, ISSMs, engineers, development teams, and assessment organizations to integrate cybersecurity requirements into system design, testing, configuration management, and operational planning activities.
• Coordinate security assessments, authorization schedules, corrective action plans, and compliance milestones, providing regular status updates and recommendations to program leadership and government stakeholders.
• Evaluate COTS, GOTS, and open-source technologies, identify cybersecurity impacts and authorization requirements, and support modernization efforts, software baseline management, and continuous authorization readiness.
• Knowledge of applicable cybersecurity standards and guidance, including:
• NIST SP 800-53
• NIST SP 800-40
• NIST SP 800-92
• NIST SP 800-115
• NIST SP 800-128
• NIST SP 800-161
• NAVWARINST 5239.20

Preferred Qualifications

• Apply expertise in DoD cybersecurity, Risk Management Framework (RMF), Assessment & Authorization (A&A), Continuous Monitoring (ConMon), and cybersecurity engineering to support secure system development, accreditation, and operational compliance.
• Manage cybersecurity compliance activities utilizing enterprise tools and repositories including eMASS, VRAM, ACAS, DADMS, and DITPR-DON to support vulnerability management, authorization efforts, and security documentation.
• Conduct security assessments, Security Test & Evaluation (ST&E), vulnerability analysis, Information Assurance Vulnerability Management (IAVM), and remediation activities to ensure compliance with NIST, DoD, and Department of the Navy cybersecurity requirements.
• Support configuration and change management processes, including Security Control Assessments (SCAs), Configuration Management (CM), Local Change Control Boards (LCCBs), Ports, Protocols, and Services Management (PPSM), and Cross Domain Solution (CDS) authorization activities.
• Collaborate with engineering, cybersecurity, and program stakeholders to implement security controls, manage cyber risk, and maintain authorization readiness across complex enterprise and mission systems.

Clearance Requirements

Some positions will require access to U.S. National Security information. Positions that require this access will be required to receive and maintain a U.S. government personnel security clearance (PCL). In order to qualify for this position, the candidate must be a US Citizen and either currently possess this National Security eligibility or be able to complete the investigation application process with a favorable determination and maintain that eligibility throughout their employment. To learn more about the security clearance process please access this link.

EEOC & Know Your Rights

Accelint companies are Equal Opportunity Employers. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, status as a protected veteran or any other status protected by applicable federal, state, and local law. We ensure that all employment decisions, including hiring, promotion, compensation, and other terms and conditions of employment, are based on merit, qualifications, and business needs. For more information about your rights, please review the "Know Your Rights" poster from the Equal Employment Opportunity Commission (EEOC). Know your Rights: English Spanish

Pay Scales & Benefits

The listed pay scale reflects the broad, minimum to maximum, pay scale for this position for the location for which it has been posted and is not a guarantee of compensation or salary. Other compensation considerations may include, but are not limited to, job responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, or other applicable factors.

Benefits include…

• Paid Time Off
• Paid Company Holidays
• Medical, Dental & Vision Insurance
• Optional HSA and FSA
• Base and Voluntary Life Insurance
• Short Term & Long-Term Disability Insurance
• 401k Matching
• Employee Assistance Program

The pay range for this role is: $110,00-136,977per year (San Diego (United States))