IA Security Administrator | Security Control Assessor

IA Security Administrator | Security Control Assessor

Location: Remote – Available across U.S. and Puerto Rico

Clearance Level: Public Trust (ADP/IT-II); Tier 3 Investigation (NACLC)
Citizenship: U.S. Citizenship required

Summary

We are seeking candidates for a potential opportunity as IA Security Administrator | Security Control Assessor to join our team supporting a large-scale federal IT environment. This role serves as a critical cybersecurity compliance expert responsible for evaluating, validating, and documenting enterprise information systems to ensure compliance with the Risk Management Framework (RMF) and ongoing Authorization to Operate (ATO) efforts.

Key Responsibilities

• Conduct Security Control Assessments (SCAs) in accordance with DoD RMF processes and NIST SP 800-53 guidelines.

• Develop, review, and maintain security documentation, including Security Assessment Plans (SAPs), Security Assessment Reports (SARs), and supporting artifacts.

• Analyze and evaluate the effectiveness of security control implementations across enterprise IT systems.

• Collaborate with Information System Security Managers (ISSMs), Information System Security Officers (ISSOs), and system owners to identify, document, and remediate assessment findings.

• Support the development and management of Plans of Action and Milestones (POA&Ms) for remediation activities.

• Provide subject matter expertise on security compliance and contribute to continuous improvement of RMF processes.

Minimum Qualifications

• Knowledge of NIST SP 800-53 controls, DoDI 8510.01 requirements, and eMASS workflows.

• Experience performing cybersecurity compliance assessments, audits, or control validations in enterprise environments.

• Ability to produce clear, concise security documentation and articulate technical findings to various stakeholders.

• Familiarity with the RMF lifecycle and cybersecurity compliance standards.

• Strong problem-solving skills and the ability to work collaboratively across teams.

• Ability to obtain and maintain a Public Trust (Tier 3/NACLC) clearance.

Education & Certifications

• Required (Foundational – one of the following):

  • Bachelor’s degree in IT / Cybersecurity / Data Science / IS / CS (ABET or CAE accredited),

  • OR CAP, CISSP-ISSAP, or GSLC.

• CE: Not applicable for this role.

Why Join Us?

This is an excellent opportunity to play a key role in cybersecurity compliance for mission-critical federal IT systems. Join our team and help ensure the security and operational readiness of enterprise technology environments.

📩 Apply today to advance your career in cybersecurity compliance and control assessment.

Please Note: This position is contingent upon contract award. Candidates selected will be notified once the award has been confirmed.

Equal Employment Opportunity and E-Verify Statement

3500 Square, LLC is proud to be an Equal Opportunity Employer. We do not discriminate against any applicant or employee on the basis of race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, protected veteran status, military status, citizenship status, or any other legally protected status, in accordance with federal, state, and local laws.

As a federal contractor, 3500 Square, LLC complies with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act (VEVRAA), providing equal opportunity and affirmative action for qualified individuals with disabilities and protected veterans.

All employment decisions are based on qualifications, merit, and business needs. Fair consideration is provided to all candidates, including U.S. citizens and nationals, as required by federal regulations regarding national origin discrimination.

If you require a reasonable accommodation to complete the application process due to a disability, please contact our Human Resources team at or 1-787-814-0087.

3500 Square, LLC participates in E-Verify. If E-Verify cannot confirm that you are authorized to work, you will receive written instructions and an opportunity to contact the Department of Homeland Security (DHS) or Social Security Administration (SSA) to resolve the issue before any employment action is taken against you, including termination.

Employers can only use E-Verify after you have accepted a job offer and completed the Form I-9.

3500 Square, LLC is an Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities.