Main Sail, LLC

Security Control Assessor

Main Sail, LLC$95K — $115K *
Education, Government & Non-Profit
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's Degree with 2-5 years experience or Associate's Degree with 5-10 years experience required for Level 3; higher degree/experience requirements for Levels 4 and 5.
  • Firm understanding of NIST SP 800-37 and NIST SP 800-53; familiarity with CNSSI 1253 is advantageous.
  • Current active Department of Energy Q clearance or Department of Defense TS clearance required.
  • Prior experience in security control assessments is necessary.
  • Strong analytical and problem-solving skills are essential.

Responsibilities

  • Implement and maintain security controls as per organizational requirements.
  • Support system authorization activities by developing security documentation like System Security Plans and Plans of Action and Milestones.
  • Monitor system security posture and identify risks and compliance gaps.
  • Track POA&Ms and coordinate remediation activities with stakeholders.
  • Assess the security impact of system changes and support configuration management processes.
  • Engage in continuous monitoring activities that include vulnerability management and security reporting.
  • Act as a security liaison among system teams, cybersecurity operations, and governance bodies.

Benefits

  • Collaborative work environment with opportunities for professional growth.
  • Engagement in critical national security projects.
  • Possibility of contract extensions beyond the initial period.
  • Potential for advancement within the organization.
Full Job Description
Candidates must be a United States Citizen (no dual status) per contract requirements.

Main Sail is seeking experienced Security Control Assessors to support cybersecurity and accreditation operations for a National Nuclear Security client located in Oak Ridge TN.

Responsibilities:

  • Implements and maintains security controls aligned with approved baselines and organizational requirements.
  • Supports system authorization activities, including the development and maintenance of security documentation such as System Security Plans (SSPs) and Plans of Action and Milestones (POA&Ms).
  • Monitors system security posture and identifies risks, vulnerabilities, and compliance gaps.
  • Tracks and manages POA&Ms and coordinates remediation activities with system stakeholders.
  • Assesses the security impact of system changes and supports configuration and change management processes.
  • Supports continuous monitoring activities, including vulnerability management and security reporting.
  • Serves as a security liaison between system teams, cybersecurity operations, and governance bodies.
  • Prepares systems for security assessments, audits, and Authorizing Official reviews.


Required Experience:

  • Level 3: Bachelor's Degree w/ 2-5 yrs responsibilities experience; or Associates Degree w/ 5-10 yrs experience.
  • Level 4: Master's Degree w/ 2-5 yrs responsibilities experience; or Bachelor's Degree w/ 5-10 yrs experience; or Associates Degree w/ 10-15 yrs experience.
  • Level 5: Master's Degree w/ 5-10 yrs responsibilities experience; or Bachelor's Degree w/ 10-15 yrs experience; or Associates Degree w/ 15-20 yrs experience.
  • Firm understanding of NIST SP 800-37 and NIST SP 800-53; CNSSI 1253 experience a plus.
  • Requires current active DoE Q; or DoW TS.


Location: Must reside within 50 miles of Y-12 Site, Oak Ridge TN

Period: 09/2026 - 09/2027 with possible extensions.

About Main Sail, LLC

Main Sail, LLC is a hospitality company that provides vacation rental management services. The company was founded in 2014 and is based in Austin, Texas. Main Sail's platform allows property owners to list their properties on various vacation rental websites, such as Airbnb and VRBO, and manage their bookings and reservations. The company also provides cleaning and maintenance services for vacation rental properties. Main Sail's mission is to help property owners maximize their rental income and provide a seamless vacation rental experience for guests.
Learn more about Main Sail, LLC
Size
100 employees
Industry

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