Sr Cyber Engineer (ISSE)

Posted Yesterday
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San Diego, CA, USA
In-Office
110K-137K Annually
Senior level
Aerospace • Defense • Manufacturing
Built for the Mission
The Role
Serve as an ISSE supporting RMF and A&A for DoD/DON systems: manage RMF steps, perform vulnerability and risk assessments, maintain eMASS and VRAM artifacts, coordinate authorization schedules, support ACAS/IAVM activities, develop cybersecurity policies and authorization packages, and liaise with program leadership and engineering teams to ensure continuous compliance and authorization readiness.
Summary Generated by Built In

Accelint is a mission-driven technology company focused on strengthening national security and supporting critical industries. We build the technologies that help operators and organizations see what’s happening, make faster and better decisions, take action with confidence, and stay ready for what comes next. Our work includes advanced sensors, autonomous systems, mission command and control software, AI-enabled training and simulation, and tools that improve logistics, maintenance, and overall readiness.  

For nearly 30 years we have supported military and civilian agencies across the Department of Defense, U.S. allies and partners, and essential industries. When you join Accelint, your work directly contributes to protecting national security and strengthening the systems our society depends on.  

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))

Skills Required

  • Bachelor's degree in Cybersecurity, Information Assurance, IT, Computer Science, Engineering, or related field
  • Minimum of 8+ years of cybersecurity, RMF, information assurance, or cybersecurity engineering experience supporting DoD or Federal programs
  • Experience serving as an Information Systems Security Engineer (ISSE), Cybersecurity Engineer, Information Systems Security Officer (ISSO), or similar role
  • Extensive knowledge and hands-on experience with DoD Risk Management Framework (RMF) and A&A processes
  • Experience using Enterprise Mission Assurance Support Service (eMASS) for control compliance documentation and artifacts
  • Experience conducting vulnerability assessments, risk assessments, and remediation planning (including ACAS/IAVM workflows)
  • Knowledge of NIST and DoD cybersecurity standards and guidance (NIST SP 800-53/40/92/115/128/161, NAVWARINST 5239.20, CNSSI)
  • Experience supporting security control assessments, authorization packages, and accreditation activities (A&A)
  • Proficiency with Microsoft Office applications (Word, Excel, PowerPoint, Outlook)
  • Strong analytical, organizational, written, and verbal communication skills
  • Ability to manage multiple priorities and work effectively in a team-oriented environment
  • Active Secret Security Clearance (current)
  • Familiarity with vulnerability remediation tracking and asset management tools (VRAM)
  • Experience with DADMS and DITPR-DON system compliance and software accountability
  • Experience with Cross Domain Solutions (CDS), PPSM, SSA/ISEA reviews, and CNSSI overlays
  • Experience planning and managing cybersecurity lab assets and supporting RMF Steps 3 and 4
  • Experience participating in Configuration Management (CM) activities and Local Change Control Boards (LCCB)
  • Familiarity with Continuous Monitoring (ConMon) and Security Testing and Evaluation (ST&E)
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The Company
HQ: Falls Church, VA
460 Employees
Year Founded: 2014

What We Do

Accelint delivers AI, autonomy, and mission systems that ensure mission readiness and tactical advantage - fielded fast and built for operators. For over 25 years the DoD and our allies have trusted Accelint with their hardest challenges. Contact [email protected] for more information

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