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Information System Security Engineer with Security Clearance

ClearanceJobs
Fort Belvoir, VA Full Time
POSTED ON 1/6/2026
AVAILABLE BEFORE 2/4/2026
Job Description Job Title: Information Systems Security Engineer (ISSE)

Location: Ft. Belvoir, VA - 60% onsite

Clearance: Active TS/SCI CI Poly Employment Type: Full-Time

Education: Bachelor's degree in a related field with 9 years of ISSE experience; OR Master's degree with 7 years of relevant experience; OR High School Diploma (or equivalent) with 13 years of relevant experience

Salary: 150k to 175k

Benefits: Health, dental, vision, 401(k), PTO, and more

Application: Apply directly or submit your resume through Enlighten's careers portal Overview

Enlighten is seeking a mid-to-senior level Information Systems Security Engineer (ISSE) to support system and network designs spanning multiple enclaves, including environments with varying data protection and classification requirements. This role requires strong experience with DoD RMF, distributed architectures, and cloud-based systems supporting big data applications. The ideal candidate is adaptable, collaborative, and comfortable working in a hybrid environment with evolving mission needs. Key Responsibilities

Create, review, and edit system authorization documentation for completeness and accuracy in accordance with federal and DoD policies Implement and support DoD Risk Management Framework (RMF) system accreditation processes Assess operational and use-case risks for integrated Open Source, GOTS, and COTS software components Utilize vulnerability management systems, automated security scanning tools, and system accreditation record systems Provide security planning, assessment, risk analysis, and risk management support Recommend system-level solutions to meet security requirements and guide development teams in achieving required security posture Support the Government in enforcing trusted relationships among external systems and architectures Apply IA policies, procedures, and workforce frameworks to design, develop, and implement secure networking, computing, and enclave environments Facilitate information exchanges, gather technical data, and collaborate with diverse technical and non-technical stakeholders Required Skills 9 years of experience as an ISSE supporting large, multi-tiered DoD or Government programs (experience requirements may vary by education level) Hands-on experience implementing DoD system accreditation processes (DIACAP acceptable; RMF preferred) Working knowledge of TCP/IP protocols, computer architectures, and network topologies Experience with DISA STIGs and SRGs, vulnerability management systems, mitigation, and compliance processes Experience reviewing and analyzing results from automated security scanning tools Strong ability to work independently and as part of a team Ability to operate effectively in a hybrid work environment with schedule flexibility DoD 8570 IAT Level II certification (Security , SSCP, CCNA-Security, or GSEC required) Desired Skills CISSP-ISSEP certification About Metronome, LLC Metronome is a spark that ignites passion for our customers and each other. We offer professional services to Government customers that keep projects pulsing. We believe in taking care of people so they can put their best foot forward to support the mission. Background Screening/Check/Investigation: Successful Completion of a Background Check will be required as a condition of hire. Benefits: Metronome offers a comprehensive benefits package that reflects our commitment to creating a diverse and supportive workplace. Benefit eligibility is determined on the type of position (full-time, part-time, temporary). Metronome's range of benefits include, but are not limited to, Medical, Vision & Dental Insurance, Life Insurance, Paid Time-Off & Company Paid Holidays, Personal Development & Learning Opportunities. Application Process: Please follow all instructions carefully. Errors or omissions may affect your consideration for employment. Select Create Profile and Apply to Requirement Complete your Profile and Answer the Questionnaire Upload a current resume Complete the Online Application and Submit Evaluation Process: Metronome will evaluate applicants based on how well they meet the qualifications of the position above. Your completed application (including questionnaire, resume, and online application) will be used to determine your eligibility and how well you meet the qualifications for this position. Your responses to the questionnaire may be compared to your resume and application; if either your resume or application contradicts or does not support your responses, you will disqualify yourself and not receive further consideration for this job. Equal Employment Opportunity Policy Metronome does not discriminate in employment on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, membership in an employee organization, retaliation, parental status, military service, or other non-merit factor. Reasonable Accommodation Policy Metronome is committed to providing reasonable accommodations to applicants with disabilities where appropriate. A reasonable accommodation is any change to a job, the work environment, or the way things are usually done that enables an individual with a disability to apply for a job, perform job duties or receive equal access to job benefits. Applicants requiring reasonable accommodation for any part of the application process or hiring process should contact Metronome Human Resources at or 703-957-4082. Determinations on requests for reasonable accommodation will be made on a case-by-case basis.

Salary : $150,000 - $175,000

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