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Information System Security Specialist I

Sentar Inc.
Charleston, SC Full Time
POSTED ON 11/26/2025
AVAILABLE BEFORE 3/25/2026
Sentar is proud to be an employee-owned company, fostering a culture of empowerment, collaboration, and innovation. Sentar is dedicated to developing the critical talent that the connected world demands to create solutions to address the convergence of cybersecurity, intelligence, analytics, and systems engineering. We invite you to join the team where you can build, innovate, and secure your career.

Sentar is seeking a Information System Security Specialist I in Charleston, SC!

Role Description

This role supports the implementation and maintenance of Risk Management Framework (RMF) processes and ensures compliance with DoD and NIST standards. The ideal candidate will have strong knowledge of RMF tools, ATO compliance preparation, and a commitment to protecting critical information systems.

Primary Responsibilities

  • Assist with the movement of information systems through the RMF process and support ongoing compliance activities.
  • Utilize tools like eMASS and ACAS to perform assessments and document results.
  • Develop and update security documentation, including System Security Plans (SSPs) and Plan of Action and Milestones (POA&Ms).
  • Conduct risk and vulnerability assessments to identify potential security issues and recommend mitigations.
  • Support the preparation and review of ATO compliance artifacts.
  • Monitor system compliance with NIST 800-53 controls and DISA STIGs to ensure adherence to established security policies.
  • Collaborate with team members to assess and remediate vulnerabilities identified through scanning tools and security assessments.
  • Participate in sessions aimed at improving RMF processes and integrating updates to security policies and standards.
  • Provide support for system administrators, engineers, and developers by creating or updating policies and process documentation.
  • Submit weekly reports to leadership regarding program statuses and system compliance.

Qualifications

Clearance Level: Secret

Education

  • High School Diploma or GED.

Certifications

  • IAT Level I certification.

Experience

  • 2 years of experience in Cybersecurity, Engineering, Test & Evaluation, or Assessment & Authorization (A&A)/Certification & Accreditation (C&A).
  • Proficiency in RMF processes and tools like eMASS and ACAS.
  • Familiarity with security policies and the preparation of ATO compliance artifacts.

Benefits At Sentar

Our unique ownership model attracts top talent, giving employees the freedom to take initiative and drive meaningful improvements. In addition to cultivating a thriving and inclusive work environment, Sentar offers an extensive benefits package designed to support the well-being of employees and their families. Employee ownership is the foundation of our culture, promoting participation, teamwork, and accountability while ensuring long-term financial security and a commitment to excellence.

  • Voluntary Medical, Dental, Vision, with Health Savings or Flexible Spending Plan options
  • Voluntary Life, Critical Illness, Accident, and Long Term Care insurance options
  • Group Term Life, Short-Term and Long-Term Disability is provided by Sentar to all qualifying employees
  • Generous 401(k) match
  • Competitive PTO plan that graduates quickly with years of service
  • Other leave programs; holiday schedule along with bereavement, maternity, jury and military duty
  • Mental health awareness programs
  • Tuition reimbursement
  • Professional development reimbursement
  • Recognition and Awards programs

If you are not ready to apply for this position, submit your resume here to join our talent community. We'll keep you updated occasionally on new job opportunities.

Sentar is an Affirmative Action and Equal Opportunity Employer M/F/Vets/Persons with Disabilities

Our culture is one of inclusivity and support. Sentar is proudly an Equal Opportunity and VEVRAA Federal Contractor Employer M/F/Vets/Persons with Disabilities. Follow these links to learn more about your rights: EEO Is the Law Poster; EEO Is Law Supplement; and Pay Transparency.

We want you to build your career at Sentar, so if you are an individual with a disability and require a reasonable workplace accommodation applying for a job or at any point in the employment process, contact the Recruiting Manager at recruiting@sentar.com. Please indicate the specifics of the assistance needed. Thank you for considering Sentar in your employment search.

Build, Innovate, Secure Your Career at Sentar.

Salary.com Estimation for Information System Security Specialist I in Charleston, SC
$67,509 to $80,665
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