Vulnerability Management and Endpoint Security Administrator

JCS Solutions LLC•Fort Belvoir, VA

3d•$70,000 - $100,000•Onsite

About The Position

CS Solutions LLC is seeking a Vulnerability Management and Endpoint Security Administrator to provide cybersecurity expertise supporting enterprise IT operations on a high-profile Department of War (DoW) contract supporting DTRA. This role serves as a cybersecurity subject matter resource across Vulnerability Management and Endpoint Security teams, helping modernize, secure, and continuously improve enterprise IT services and mission capabilities across CONUS and OCONUS environments. The ideal candidate brings deep experience with ACAS/Nessus, Tanium, and enterprise endpoint security technologies, along with the ability to independently assess cybersecurity risks, evaluate remediation strategies, and provide risk-based recommendations that balance mission requirements, operational needs, and security objectives.

Requirements

Bachelor's degree in Cybersecurity, Information Technology, Computer Science, Information Systems, or a related discipline and at least 4 years of relevant experience; or 8+ years of relevant experience in lieu of a degree.
4+ years of progressively responsible experience in vulnerability management, endpoint security, cybersecurity engineering, information assurance, or related enterprise cybersecurity functions.
Demonstrated ability to independently assess cybersecurity vulnerabilities, evaluate risk, and recommend remediation strategies.
Strong hands-on experience with ACAS/Nessus, including scanning, policy administration, credentialed scanning, reporting, remediation, and validation.
Strong hands-on experience with Tanium for endpoint management, compliance analysis, visibility, asset inventory, and vulnerability remediation.
Working knowledge of Trellix endpoint-security technologies.
Experience conducting risk-based vulnerability analysis and establishing remediation priorities.
Experience administering and securing both Microsoft Windows and Linux environments.
Working knowledge of DISA STIG compliance, SCC, STIG Viewer, secure configuration baselines, and security-hardening methodologies.
Knowledge of NIST, ICD, CNSS, and DoD cybersecurity requirements and standards.
Excellent analytical, communication, organizational, and problem-solving skills.
Active DoD 8140 IAT Level II certification (Security+ CE or equivalent).
Ability to satisfy applicable DoD 8140 Cyber Workforce qualification requirements.
Active Top Secret/Sensitive Compartmented Information (TS/SCI) security clearance.

Nice To Haves

Direct experience supporting FISMA Security Authorization activities, A&A/RMF processes, ATOs, NIST SP 800-53 control assessments, and authorization package development or maintenance.
Experience developing, reviewing, or maintaining federal cybersecurity authorization documentation and artifacts.
Hands-on experience with vulnerability management and/or security monitoring activities, including scan review, validation, prioritization, remediation coordination, and status reporting.
Experience supporting incident response activities including alert triage, documentation, escalation, containment support, recovery coordination, and lessons learned.
Experience documenting findings, risks, corrective actions, control evidence, and POA&M activities in an audit-ready environment.
Ability to communicate cybersecurity and compliance requirements effectively to both technical and non-technical stakeholders.
Ability to obtain or maintain an HHS Public Trust Tier II background investigation.
Advanced expertise with Tanium Asset, Discover, Comply, Deploy, Patch, Interact, Reporting, and custom sensor development.
Advanced ACAS/Nessus architecture, administration, dashboarding, credentialed scan troubleshooting, and enterprise reporting experience.
Experience with Trellix ePO, Trellix Endpoint Security, Microsoft Defender for Endpoint, or comparable EDR platforms.
Previous experience as an ISSO, ISSM, Cybersecurity Engineer, or similar cybersecurity leadership role.
Experience supporting DoW environments, classified networks, or large-scale enterprise cybersecurity operations.
Experience creating vulnerability-management dashboards, automated reporting solutions, and integrations using PowerShell, Python, SQL, or similar technologies.
Experience evaluating POA&Ms, compensating controls, risk acceptance requests, and vulnerability exceptions.
Experience advising technical and program leadership on cybersecurity strategy and risk management decisions.
Relevant Microsoft, Linux, RHCSA, Linux+, or comparable technical certifications.

Responsibilities

Analyze enterprise vulnerability and endpoint security posture across Windows, Linux, virtual, and enterprise environments.
Administer and optimize ACAS/Nessus capabilities, including scan architecture, credentialed scanning, vulnerability analysis, reporting, and troubleshooting.
Conduct in-depth vulnerability assessments and establish risk-based remediation priorities.
Evaluate cybersecurity risks, compensating controls, remediation alternatives, and exception requests.
Utilize Tanium to assess endpoint visibility, asset inventory, compliance posture, vulnerability exposure, and remediation requirements.
Analyze endpoint-security posture using Trellix and associated technologies.
Correlate security, compliance, vulnerability, and asset-management data to identify enterprise-wide risks and coverage gaps.
Develop and recommend solutions to complex vulnerability-management and endpoint-security challenges.
Assess vulnerability exceptions, risk-acceptance requests, and provide technical recommendations to leadership.
Evaluate endpoint configurations and recommend security-hardening strategies aligned with STIG requirements.
Develop dashboards, metrics, reporting, and executive-level cybersecurity summaries.
Support incident response, threat hunting, and endpoint containment activities.
Assess cybersecurity impacts of proposed infrastructure, software, and security-tool changes.
Recommend improvements to vulnerability-management processes, technologies, and operating procedures.
Develop and maintain technical standards, procedures, and knowledge documentation.
Advise engineers, system owners, cybersecurity personnel, and leadership on risk and remediation strategies.
Manage competing priorities while independently determining appropriate technical approaches within contractual and security requirements.

Benefits

CS Solutions LLC offers enterprise-wide solutions including cloud computing, software development, cybersecurity, digital modernization, and management consulting for the federal government.
At JCS, we elevate our customers’ mission through the application of technology and professional services.
Our commitment to investing in our workforce drives innovation and progress for our clients, employees, and communities.
JCS is both a Great Place to Work and a Top Places to Work certified company.
Our employees embody our core values, and we are looking for others who do too!
Customer Experience: Strive for excellence and delight our clients
Innovation: Embrace creative thinking to enable continual growth and powerful solutions
Accountability: Take ownership of and pride in our actions and service delivery
Inspire: Be inspired to be your best self and have fun in the process
Integrity: Do the right thing, the right way, every time!
Stewardship: The careful and responsible management of something entrusted to our care.