nessus jobs in San Diego

The Cyber Security Analyst develops and maintains assessment documentation, performs ongoing compliance assessments using tools like ACAS, SCAP, and Trellix, and conducts security audits and Site Based Security Assessments (SBSAs) of NCS Family of Systems. The role requires 5–8 years of cybersecurity experience, current DoD 8140-compliant IAT II certification (Security+ with appropriate CE/OS), and expertise in Risk Management Framework (RMF) v3/v5, System Security Plans (SSPs), POA&Ms, STIG remediation, and eMASS.…See more Responsibilities include patching verification, configuration and change management compliance, incident reporting, continuous monitoring, and potential appointment as Information System Security Officer (ISSO) within 6 months.

Senior Cyber Systems Engineer responsible for developing and maintaining RMF artifacts (SSPs, SARs, SAPs, POA&Ms), coordinating with Navy Authorizing Officials and Security Control Assessors, and managing cybersecurity authorization packages for ATO/IATT/IATO activities. The role involves vulnerability remediation, STIG compliance, access control policy development, patch management, and server/network infrastructure oversight.…See more Requires mastery of the Risk Management Framework, CI/CD security pipelines, container hardening (Docker/Kubernetes), infrastructure-as-code tools (Terraform, Ansible), and automated security assessment tools (ACAS/Nessus). Serves as Information Systems Security Manager (ISSM) for product ATOs and coordinates with government agencies to ensure DoD and Navy cyber security requirements are met.

This Senior Systems Administrator role supports U.S. National Security by maintaining critical enterprise infrastructure, including Windows servers, domain controllers, cloud resources, and VMware environments.…See more The position requires hands-on administration of secure networks, troubleshooting of cryptographic encryptors (TACLANE/KG-175), performing vulnerability remediation with ACAS/Nessus, and executing rapid incident response for site outages. The role demands an active Top Secret clearance with SCI eligibility, 2+ years of direct systems/network administration experience, and 4+ years managing enterprise Windows infrastructure (AD, DHCP, DNS, GPO, WSUS).

Information System Security Officer III responsible for securing assigned networks, enclaves, and platform IT systems through vulnerability assessments, STIG compliance verification, and continuous monitoring. The role requires coordinating with engineers and developers to embed security throughout the system development lifecycle, managing RMF documentation and POA&M entries, conducting daily audit log and SIEM alert reviews, and supporting incident response and cyber inspections.…See more Must possess TS/SCI clearance, a bachelor's degree in IT/cybersecurity or equivalent experience, six years of hands-on security implementation and vulnerability analysis, and current DoD 8140/8570 IAM Level II certification.

Senior IT Cyber Security Specialist responsible for enterprise vulnerability scanning, system hardening, and patch management using tools like Nessus and HBSS. Administers security technologies including SIEM platforms, firewalls, endpoint protection, and VPNs while investigating security incidents and performing root cause analysis.…See more Requires 7+ years of progressive IT/cybersecurity experience in DoD or defense contractor environments, with strong Linux administration and Bash scripting skills. Must hold DoD 8570.1-M IAM Level III certification (CISSP, CISM, or GSLC) and maintain compliance with NIST SP 800-171, CMMC Level 2, and DISA STIGs.

Seeking an experienced Systems Administrator to maintain critical defense enterprise infrastructure in San Diego, including Windows servers, domain controllers, cloud resources, and VMware environments. The role requires dual network and systems administration responsibilities, including TACLANE cryptographic encryptor configuration, troubleshooting site outages, vulnerability remediation (ACAS/Nessus), system hardening, and user account management.…See more Requires 4+ years designing and deploying enterprise Windows infrastructure (AD, DHCP, DNS, GPO, WSUS) and 2+ years in a Network or Systems Administrator role, plus DoD 8570 IAT Level II compliance (Security+ or equivalent).

CyberSecurity Engineer III will design, deploy, and administer Secret and Top Secret infrastructure across on-premises and private cloud environments, managing VMware virtualization, RHEL/Windows systems, and network infrastructure. The role requires implementing security controls per NIST SP 800-53 and DISA guidelines, automating system builds and patching with Ansible and Jenkins, and remediating vulnerabilities using tools like Nessus and Splunk.…See more You'll collaborate across infrastructure, cybersecurity, and mission teams to maintain secure environments throughout development, accreditation, and operations, with five or more years of infrastructure engineering or systems administration experience required.

ManTech seeks a Systems Administrator to maintain critical enterprise infrastructure for national security operations in San Diego, supporting the 0100–0900 morning shift. The role requires administering Windows servers, domain controllers, cloud resources, and VMware environments; configuring and troubleshooting KG-175 (TACLANE) cryptographic network encryptors; performing vulnerability remediation with ACAS/Nessus; and executing rapid incident response and site outage troubleshooting.…See more Candidates must have 4+ years of enterprise Windows infrastructure experience (AD, DHCP, DNS, GPO, WSUS), hands-on TACLANE configuration expertise, and DoD 8570 IAT Level II compliance (Security+ CE or equivalent). The position includes up to 25% travel (CONUS/OCONUS) and requires an active Top Secret clearance with SCI eligibility.

Associate-level cybersecurity analyst supporting classified government information system lifecycle activities through security audits, continuous monitoring, and Assessment & Authorization (A&A) work. Responsibilities include conducting system and network security assessments, analyzing compliance with security controls and policies, supporting Security Test & Evaluation (ST&E) activities, and preparing Risk Management Framework documentation.…See more Requires a Bachelor's or Master's degree, current Secret clearance (or CE Program enrollment), and ability to obtain an IT Program Auditor certification (SecurityX/CASP+, GGRC, GSEC, GSNA, Sec+, or SSCP) within six months.

System Administrator II supporting Naval IT operations with focus on front-office workstation and user account management. Responsibilities include troubleshooting Windows endpoints, managing Active Directory and user access, maintaining compliance with Navy security standards (SAAR-N, CMAR), and providing technical support across NIPR/SIPR networks.…See more The role requires hands-on experience with Navy-specific tools (NET, NEST, NIS), helpdesk ticketing workflows, endpoint security patching, and collaboration with cybersecurity and network teams.

This role performs continuous security monitoring, compliance assessments, and authorization documentation for Department of Defense information systems. The analyst will use tools like ACAS, SCAP, and eMASS to execute Risk Management Framework processes, conduct security audits, manage Plans of Action and Milestones (POA&Ms), and coordinate STIG remediation with system engineers and administrators.…See more The position requires 5–8 years of cybersecurity experience, current DoD 8140-compliant IAT II certification (Security+), and deep knowledge of RMF, system security plans, and automated compliance scanning. The analyst must be able to work independently, manage competing priorities, and be appointed Information System Security Officer (ISSO) within six months.

This role supports cybersecurity and compliance efforts across the Risk Management Framework (RMF) process for DoD programs. Responsibilities include developing and maintaining system security documentation, Plans of Action and Milestones (POA&Ms), assessing security controls, conducting vulnerability scanning and audits, and ensuring continuous monitoring of systems compliance.…See more The position requires IAM Level I certification (DoD 8570.1M), 4+ years of information security or cybersecurity experience, and hands-on proficiency with compliance and vulnerability scanning tools such as Nessus, SCAP, ACAS, and SCC on Windows, Linux, and network devices.

ManTech seeks a Systems Administrator to support national security infrastructure in San Diego, maintaining Windows servers, domain controllers, cloud resources, and VMware environments. The role combines network and systems administration, including configuring cryptographic network encryptors (TACLANE), troubleshooting site outages, performing vulnerability remediation with ACAS/Nessus, and managing user accounts.…See more Requires a Bachelor's degree with 4+ years of IT experience (or equivalent), DoD 8570 IAT Level II compliance, and 2+ years as a Network or Systems Administrator with enterprise Windows infrastructure expertise. Travel up to 25% and an active Top Secret/SCI clearance with polygraph eligibility are required.

ManTech seeks a Systems Administrator to maintain critical national security enterprise infrastructure in San Diego, working a 0100–0900 morning shift with on-call support. Responsibilities include administering Windows servers, domain controllers, cloud resources, and VMware environments; configuring and troubleshooting TACLANE cryptographic network encryptors; performing patch management, vulnerability remediation (ACAS/Nessus), and system hardening; and managing user accounts and ticketing incidents.…See more Requires a bachelor's degree with 4+ years of IT experience (or equivalent substitution), DoD 8570 IAT Level II compliance (Security+ CE or equivalent), 4+ years of enterprise Windows infrastructure design/deployment, and hands-on TACLANE encryptor experience. Up to 25% travel (CONUS and OCONUS) is required.

Senior Principal System Administrator responsible for managing and maintaining a classified development and integration test environment, including Windows and Red Hat Enterprise Linux servers, VMware virtualization infrastructure, and network hardware. The role requires strong Linux and Windows Server administration expertise, cybersecurity compliance knowledge (DISA STIGs, Nessus, PKI), and experience supporting classified networks.…See more Responsibilities include patching workflows, ePO/McAfee integration, vulnerability scanning, system accreditation support, and maintaining DoD-mandated security posture; some after-hours support for maintenance and incident response required.

Conduct software security assessments, vulnerability testing, penetration testing, and threat analysis on TrellisWare products. Perform static and dynamic analysis, reverse engineering, and incident investigation while ensuring compliance with FIPS 140, NIST STIG, and other regulatory standards.…See more Requires 5+ years industry experience with 3+ years software development and 2+ years vulnerability testing, proficiency in Python/C++/Java, and at least one security certification (Security+, CISSP, OSCP, or SANS/GIAC).

This is a senior infrastructure and cybersecurity engineering role requiring 10+ years of experience designing, administering, and securing hybrid/cloud infrastructure across Linux, Windows Server, containerized, and private cloud environments. The engineer will implement security controls aligned with NIST SP 800-53, DISA STIGs, RMF, and Zero Trust principles, support DevSecOps pipelines and CI/CD automation, and use scripting, configuration management, and Infrastructure as Code to streamline builds, patching, hardening, and compliance.…See more The role demands collaboration across cybersecurity, software, infrastructure, and mission teams to troubleshoot complex issues, improve security practices, and communicate technical risks and recommendations.

This role supports cybersecurity engineering and infrastructure security for enterprise, cloud, and classified environments. The engineer will manage vulnerability assessment, system hardening, patching, secure configuration, and DevSecOps pipeline integration across Linux and Windows Server platforms.…See more Responsibilities include compliance support (RMF, ATO, NIST SP 800-53, DISA STIGs), CI/CD security automation, containerized environment hardening, and infrastructure-as-code implementation. Strong technical depth in cloud platforms (AWS/AWS GovCloud), container orchestration, security tooling, and the ability to communicate complex technical and compliance issues to engineering and mission stakeholders are required.

The Information System Security Officer (ISSO) serves as a steward of classified and high-side information systems, ensuring security compliance and operational resilience in accordance with DoD and DCSA standards. The role involves executing Risk Management Framework (RMF) activities, pursuing Authorization to Operate (ATO) via eMASS, conducting vulnerability scanning with tools like Nessus, and maintaining compliance with NISP and federal requirements.…See more Responsibilities include hands-on system administration, security monitoring, patch management, data transfer operations, and collaborative work with industrial security teams to integrate technical and administrative controls. Success requires proven experience processing ATO packages, system administration skills, security compliance knowledge, and the ability to balance rigorous security controls with operational effectiveness.

Lead Information Assurance and security engineering for Navy tactical networks (CANES), managing end-to-end Risk Management Framework (RMF) authorization, hardening virtualized and cloud network stacks, and ensuring compliance across diverse naval environments. Develop and maintain security authorization artifacts (SSP, SAP/SAR, POA&M, ATO packages in eMASS), apply DISA STIGs and vulnerability management tools (ACAS, NESSUS, SCAP), and provide IA guidance for application integration aligned with DoDAF and Net-Ready KPP baselines.…See more Support developmental testing, audit response, and continuous monitoring while coordinating with PEO C4I, NIWC Pacific, and Fleet stakeholders. Mentor junior engineers and champion DevSecOps and STIG automation practices.

Information Systems Security Engineer II supporting DoD Ballistic Missile Defense C4I systems with cybersecurity engineering, vulnerability management, and Risk Management Framework activities. Responsibilities include implementing cybersecurity controls, conducting DISA STIG assessments, performing vulnerability scans with tools like ACAS and Nessus, managing patches, maintaining eMASS RMF artifacts, and coordinating remediation across Windows, Linux, Hyper-V, and network environments.…See more Must assess cybersecurity risk, document findings, and support system authorization while maintaining operational readiness in a DoD test, integration, and evaluation environment.

The RMF Engineer will support DoD Assessment & Authorization activities by developing, maintaining, and managing Risk Management Framework documentation and artifacts throughout the system lifecycle. Key responsibilities include system categorization, creating and updating security plans and control evidence, managing RMF packages in eMASS, assessing security controls, and coordinating with engineering and cybersecurity teams on remediation.…See more The role requires 3+ years of hands-on DoD RMF experience, deep knowledge of NIST SP 800-53 and RMF processes, and proficiency with authorization management tools. This hybrid position is mostly remote and demands strong technical documentation and stakeholder communication skills.