Senior Cyber Security Engineer​/ISSO

Parsons is hiring a Senior Cyber Security Engineer / Information Systems Security Officer (ISSO) for the Federal Solutions team, supporting the Ground-based Midcourse Dense (GMD) Product Office under the TN-MDSE contract managed by the Missile Defense Agency. This onsite role in Huntsville, AL combines deep security engineering work with structured program delivery and clear visibility into risk management across the system lifecycle.

Alongside meaningful mission impact, Parsons offers a comprehensive benefits package designed to support day-to-day wellbeing and long-term financial security.

• Medical, dental, and vision coverage
• Paid time off and holidays
• Life insurance
• Employee Stock Ownership Plan (ESOP) and 401(k)
• Flexible work schedules
• Financial Wellness, Work Life Harmony, Career Development, Veteran Support, Mind & Body, and Health

• Serve as part of the cybersecurity team developing system security packages including Security Plans (SSPs), Interim Authority to Test (IATT), Authority to Connect (ATC), and Authority to Operate (ATO) documents.
• Perform analysis to validate established security requirements, recommending additional requirements and safeguards when needed.
• Conduct periodic reviews of system audits and monitor corrective actions until closure.
• Develop, review, and update security artifacts as required.
• Confirm RMF requirements are properly addressed and ensure required artifacts are loaded and managed in eMASS (Enterprise Mission Assurance Support Service).
• Interface with other cyber teams to review RMF Contract Data Requirements Lists (CDRLs), support timely delivery of CDRL artifacts, and provide feedback to improve sufficiency and quality.
• Perform vulnerability and risk analyses using expertise in relevant information systems security.
• Track and monitor Plan of Action and Milestones (POA&Ms).
• Review cybersecurity artifacts and technical briefings, coordinating with customers to resolve findings.
• Ensure security controls are implemented and operating as intended across lifecycle phases.
• Track deliverables including artifacts, schedules, and metrics.
• Contribute to and may lead planning and implementation of large programs, regularly interfacing with senior management and executive leadership.
• Lead, mentor, and provide guidance to Associate and Junior ISSOs, and support functional strategic planning.

• Active Secret clearance (required)
• Bachelor’s Degree in Engineering or an equivalent technical/scientific discipline (related to area of specialty) plus 10+ years of related professional experience
• Demonstrated ability to analyze complex problems, identify root causes, and provide actionable recommendations
• Knowledge to perform technical work using the Risk Management Framework (RMF) process, including solving Information Assurance (IA)-related technical problems
• Ability to establish strict program control processes to support certification and accreditation activities, including process support, analysis support, coordination support, security certification test support, security documentation support, investigations, software research, hardware introduction and release, emerging technology research inspections, and periodic audits

• Enterprise Mission Assurance Support Service (eMASS)
• Risk Management Framework (RMF)

Salary: $134,100 - $241,400 per year.

Desired skills (if applicable): a Master’s Degree in STEM and 12+ years working on missile defense-related or other complex, large DoD programs/projects, plus MDA experience and knowledge of MDA processes.