Local Defender Cybersecurity (ISSO Focused, SOC & Threat Analyst)

Job description

General Summary:
The Local Defender serves as a critical cybersecurity role that combines ISSO responsibilities with traditional Security Operations Center (SOC) and Threat Analyst functions.

The position is pivotal in maintaining the cybersecurity posture of systems under its purview by supporting system authorization, implementing cybersecurity policies, and ensuring continuous monitoring in accordance with DoD Risk Management Framework (RMF).

This individual will proactively manage compliance with cybersecurity directives, respond to incidents, and provide support to the Government customer by implementing technical and procedural safeguards based on RMF controls.

The preferred candidate is an experienced ISSO with in-depth knowledge of NIST 800-53 controls, RMF lifecycle steps, and DoD cybersecurity policies (DoDI 8510.01, 8500.01, AR 25-2).

This role requires the ability to work independently, support system owners, and lead the documentation, authorization, and ongoing assessment of information systems.

Requires working on-site and as needed during incidents.

May require CONUS and/or OCONUS travel to customer sites.



Principal Duties and Responsibilities (*Essential Functions):


+ Serve as the ISSO in support of the ISO for assigned systems, ensuring full compliance with RMF, DoDI 8510.01, and NIST SP 800-53 security control baselines.

+ Manage and maintain all RMF-related documentation including System Security Plans (SSPs), Security Assessment Reports (SARs), Risk Assessment Reports (RARs), and Plan of Action and Milestones (POA&Ms).

+ Conduct security control assessments and facilitate ongoing authorization (ATO/ATC) activities.

+ Work directly with system owners, administrators, and the Government cybersecurity team to ensure all security controls are properly implemented and documented.

+ Coordinate and support all phases of the RMF lifecycle from categorization to continuous monitoring.

+ Lead vulnerability and compliance assessments using automated tools (e.g., ACAS, STIG Viewer) and ensure all findings are remediated or tracked via POA&Ms.

+ Participate in Configuration Control Boards (CCBs) and validate that system changes do not negatively impact security controls or the authorization boundary.

+ Track and report on system compliance metrics, ensuring timely updates to APMS and eMASS and supporting audit readiness activities.

+ Develop and deliver security awareness training, user role validation, and account recertification in accordance with policy.

+ Act as liaison with Authorizing Officials (AOs), Control Assessors (CAs), and NETCOM to facilitate ATO packages and compliance reviews.

+ Monitor and analyze security events from SIEM platforms, firewalls, IDS/IPS, and EDR tools to detect threats and abnormal activity.

+ Support incident response activities and coordinate with local defender to assess impact, containment, and recovery actions.

+ Document all security incidents in alignment with incident handling procedures and provide after-action reports for leadership.

+ Ensure that incident findings are mapped back to RMF controls, and that system documentation is updated accordingly.

+ Monitor Cyber Tasking Orders (CTOs), security bulletins, CVEs, and threat intelligence feeds for relevance to the operational environment.

+ Analyze potential threat vectors and adversary TTPs using frameworks such as MITRE ATT&CK and translate findings into actionable security enhancements.

+ Collaborate with stakeholders to recommend technical and policy-based countermeasures aligned with organizational risk tolerance and mission impact.

+ Prepare detailed risk assessment reports, compliance dashboards, and security briefings for senior leadership and stakeholders.

+ Submit timely updates and artifacts to eMASS and participate in regular cybersecurity status meetings.

+ Provide clear, data-driven recommendations for improving system security postures and addressing identified risks.

+ Coordinate with mission owners and developers to implement security in system development lifecycles (SDLC).

+ Maintain awareness and proper configuration of continuous monitoring tools including SIEMs, vulnerability scanners, and audit logging tools.

+ Ensure tools and scripts used for compliance monitoring (e.g., RMF assessments, ACAS scans) are operating effectively and producing accurate outputs.

+ Collaborate with system administrators to remediate security findings and improve hardening based on STIGs and best practices.




At COLSA, people are our most valuable resource and centered at our core value.

We invite you to unite your talents with opportunity and be a part of our “Family of Professionals!” Learn about our employee-centric culture and benefits here (https://www.colsa.com/culture_benefits/) .


Required SkillsRequired Experience

+ Bachelor’s degree in Cybersecurity, Computer Science, Information Assurance, or a related field (or equivalent experience).

Minimum of 3 related certifications may be used in place of related academic field.



+ Minimum of 10 plus years of work related experience to include 2+ years of direct ISSO or cybersecurity compliance experience, preferably within a DoD or Federal environment.



+ CompTIA Security+, CISSP, or equivalent DoD 8570 IAT Level II/III certification.



+ Active DoD Secret Security Clearance with the ability to obtain Top Secret.

+ Strong working knowledge of RMF, NIST SP 800-53, DoDI 8510.01, DoDI 8500.01, CNSSI 1253, and associated security control families.



+ Familiarity with vulnerability management tools such as ACAS, STIG Viewer, and SCAP Compliance Checker.



+ Familiarity with DRAGOS, Corelight, Splunk, Snort

+ Experience managing cybersecurity artifacts within eMASS or other compliance platforms.



+ Understanding of NETCOM directives and cybersecurity service provider (CSSP) coordination.




Preferred Qualifications:


+ Experience supporting Authority to Operate (ATO) processes, both initial and continuous monitoring.



+ Strong analytical skills for evaluating control effectiveness, incident impact, and system vulnerabilities.



+ Proficiency in security documentation, audit preparation, and stakeholder communication.



+ Familiarity with scripting (e.g., PowerShell, Python) for automating compliance checks or log analysis.



+ Demonstrated ability to balance RMF compliance with operational mission support.



+ Previous experience with Dragos OT Sensor Equipment Preferred.



+ CAP (Certified Authorization Professional), CISM, GSNA, or RMF-focused GIAC certifications.




Applicant selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information.

COLSA Corporation is an Equal Opportunity Employer, Minorities/Females/Veterans/Disabled.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin.

Required Skill Profession

Other General