Senior System Security Specialist

We are seeking a Senior System Security Specialist with deep expertise in defining security requirements and developing solutions for Multilevel Security (MLS) environments. This role focuses on analyzing MLS challenges, evaluating the capabilities of approved security products, and ensuring that high-level applications meet strict security requirements. The specialist will play a critical role in shaping security architectures, validating technical approaches, and designing solutions that protect systems operating across multiple classification or sensitivity levels.

Location: Periodic onsite work at various locations throughout the State of Maryland.

• Analyze and define security requirements for Multilevel Security (MLS) architectures and applications.
• Evaluate approved security products and determine their applicability, strengths, and limitations in MLS environments.
• Develop technical solutions that address MLS challenges, including data separation, access control, labeling, policy enforcement, and system interoperability.
• Recommend enhancements to systems, architectures, or configurations based on MLS requirements and risk considerations.
• Review designs, requirements, and technical documentation to ensure alignment with MLS constraints and mission needs.
• Collaborate with engineering, security, and program teams to guide the secure development of high-level applications.
• Provide expert insights on MLS policies, system behaviors, and technical safeguards.
• Produce clear documentation, reports, and recommendations that support certification, accreditation, or audit activities.
• Support troubleshooting and problem resolution related to MLS constraints or system behavior.

• Bachelor's degree in Information Security, Computer Science, Engineering, or a related discipline; or equivalent experience.
• Strong understanding of MLS concepts, including data classification, labeling, access control models, and trusted computing bases.
• Experience analyzing system architectures and identifying MLS-related risks and constraints.
• Strong communication skills with the ability to produce clear and accurate technical documentation.
• Proven ability to work across technical teams to solve complex security challenges.
• 5+ years of specialized experience in:
• Defining computer security requirements for high-level or mission-critical applications
• Evaluating approved security products for MLS applicability
• Developing solutions to complex MLS problems

• Experience supporting MLS environments in federal, defense, or classified settings.
• Knowledge of trusted operating systems, cross-domain solutions, or high-assurance architectures.
• Familiarity with security frameworks and guidance such as NIST SP 800-53, NIST SP RMF), NSA or CNSS policies
• Professional certifications such as:
• ISSP
• ISSEP
• GSLC
• GSEC

Assurit is an award winning, certified small business headquartered in Fairfax, VA. We offer a highly competitive compensation and benefits package inclusive of medical and dental coverage, as well as paid time off.

Founded in 2013, Assurit has become a trusted provider of cybersecurity expertise to customers across federal, state and local governments, as well as the commercial sector. We are an employee-centric organization that focuses on the growth and development of our greatest asset – our people. We believe that if our Team is trained and educated, we will always be able to deliver our promise of customer success. If you enjoy work environments focused on continuous learning and growth, Assurit will be a great fit for you.

Whether you saw a specific job opening of ours or are simply interested in learning more about building your career at Assurit, feel free submit your resume. Based on your request, the appropriate individual within our organization will get back to you within 2 business days.

Assurit is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.