Security Analyst

Join our team at Core One! Our mission is to be at the forefront of devising analytical, operational and technical solutions to our Nation's most complex national security challenges. In order to achieve our mission, Core One values people first! We are committed to recruiting, nurturing, and retaining top talent! We offer a competitive total compensation package that sets us apart from our competition. Core One is a team-oriented, dynamic, and growing company that values exceptional performance!

Clearance Required: Active TS/SCI with Polygraph

Summary

We are seeking a Security Analyst to support cybersecurity operations, compliance, and risk management for FedRAMP-authorized and Intelligence Community (IC) systems. This role is responsible for ensuring systems meet stringent federal security requirements while enabling secure, scalable, and compliant cloud and on-premises solutions.

The ideal candidate brings deep expertise in NIST frameworks, FedRAMP authorization processes, continuous monitoring (ConMon), and ATO lifecycle management, along with the ability to operate in classified or high-security environments.

Key Responsibilities

Lead and support FedRAMP Moderate/High and IC ATO authorization processes

Develop, review, and maintain security documentation: System Security Plans (SSP), Security Assessment Reports (SAR), Plan of Action & Milestones (POA&M)

Ensure compliance with NIST SP 800-53 / 800-37 RMF, FedRAMP baselines, ICD 503

Perform risk assessments, control assessments, and gap analyses

Implement and manage RMF lifecycle activities (Categorize → Monitor)

Track and manage POA&M remediation activities

Facilitate security control inheritance and shared responsibility models

Execute continuous monitoring strategies and reporting

Analyze security posture using Vulnerability scans and Configuration compliance

Monitor and analyze security events and alerts

Support incident response and forensic analysis

Coordinate with SOC teams and stakeholders for threat mitigation

Conduct root cause analysis and lessons learned

Secure cloud environments aligned with FedRAMP controls

Implement identity and access controls

Support 3PAO assessments and audits

Prepare evidence artifacts for FedRAMP JAB/Agency ATO reviews and Inspector General (IG) audits

Coordinate with internal/external auditors

Utilize security tools for monitoring and compliance: Splunk, Sentinel, Vulnerability management tools, RSA Archer, ServiceNow

Support automation of compliance and reporting workflows

Act as liaison between Engineering teams, ISSOs / ISSMs, and Compliance and audit teams

Provide security guidance during system design and change management

Mentor junior analysts and support team development

Promote a culture of security-first engineering and compliance excellence

Contribute to security governance and policy development

Qualifications

Active TS/SCI with Polygraph

Bachelor's degree or higher in Cybersecurity, IT, or related field and 5+ years' experience in Cybersecurity in federal or IC environments

OR Masters and 3+ years of experience in Cybersecurity in federal or IC environments

Strong Knowledge of NIST RMF (800-37), NIST 800-53 controls, and FedRAMP requirements

At least one of the following certifications: CISM or CISA, CompTIA Security+ (baseline), Certified Authorization Professional (CAP), CCSP (cloud security)

Experience in the following tools: NIST 800-53, RMF, FedRAMP, ICD 503, RSA Archer, ServiceNow GRC, Splunk, Azure Sentinel, Nessus, ACAS, AWS GovCloud, Azure Government, GCP, SCAP, STIG Viewer

Desired Qualifications

Experience with cloud-native security tools

Knowledge of Zero Trust Architecture

Experience with cross-domain solutions

Experience with ICD 503

Familiarity with DevSecOps pipelines in regulated environments

Core One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

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