network-security jobs in San Diego

Lead detection operations, incident response, and security operations maturation for a growing security team. Operate SIEM/XDR across endpoint, cloud, identity, network, and SaaS telemetry; conduct complex investigations; tune detections; and drive root-cause analysis and post-incident improvements.…See more Require 6+ years of hands-on security operations, detection engineering, or incident response experience with deep proficiency in SIEM/XDR query languages, EDR platforms, scripting (Python, PowerShell, Bash), and MITRE ATT&CK framework application. Mentor analysts, define playbooks and runbooks, lead threat hunts, and own SecOps metrics and operational-readiness reporting.

Director-level role leading cyber architecture strategy and teams at an enterprise consulting firm. Responsibilities include architecting secure cloud and AI-enabled solutions, guiding security controls and design patterns, mentoring security professionals, and providing technical thought leadership on emerging technologies like generative AI and agentic systems.…See more Requires 10+ years of security architecture experience, expertise across IaaS/PaaS/SaaS platforms, and proven ability to influence enterprise technology strategy while balancing business enablement with risk management.

Senior Network Engineer providing engineering, integration, testing, and operational support for complex Combined Test Bed (CTB) network environments in defense settings. Responsibilities include installation, configuration, upgrades, and STIG compliance of network infrastructure; monitoring and troubleshooting network performance at physical and IP packet levels; designing and maintaining secure multi-cloud connectivity across AWS and Azure; and configuring enterprise networking technologies including routing, switching, firewalls, IPsec, OSPF, and BGP.…See more Requires 10+ years in network engineering within enterprise or government environments, expertise in routing/switching platforms, Palo Alto firewalls, HPE Aruba solutions, cloud networking, and active Secret clearance with DoD 8570 IAT Level II and networking certifications (CCNA, CCNP, or CCDP).

Design and implement ultra-high-performance packet processing software for AWS EC2's Nitro System, handling encryption, firewalls, routing, and billing across millions of hosts worldwide. Optimize data structures and low-level hardware tuning to achieve millions of packets per second on single CPU cores using C/C++.…See more Own end-to-end feature design, implementation, integration testing, and production deployment across the global EC2 fleet. Mentor junior engineers and collaborate with cross-functional teams on system architecture, CI/CD validation platforms, and monitoring/diagnostics services.

Lead senior systems engineer on the EC2 NX Platforms team, owning the packet processing pipeline that runs beneath every EC2 instance across 9M+ hosts globally. Design and implement ultra-high-performance networking software handling encryption, firewalls, routing, billing, and monitoring — targeting millions of packets per second on a single CPU core through highly optimized C/C++ code and low-level hardware tuning.…See more Mentor junior engineers, lead architecture decisions, conduct design and code reviews, and communicate technical designs with users and senior management. Ship production code with immediate, measurable impact across the entire EC2 fleet powering AWS Lambda and all external workloads.

S. Navy RDT&E infrastructure, requiring 10+ years of enterprise network engineering experience.…See more iring 10+ years of enterprise network engineering experience. The Network Engineer will design, configure, and maintain complex routing, switching, and firewall solutions across on-premises and cloud environments (AWS/Azure), implement Zero Trust and network security architectures, and ensure STIG compliance and high-performance connectivity. Hands-on expertise with BGP, OSPF, IPsec, VLANs, HPE Aruba, Palo Alto firewalls, and enterprise monitoring tools (Traffic Sentinel, Zabbix) is essential. An active Secret clearance and IAT II certification (Security+, CCNA Security, or equivalent) are required.

Serve as a primary administrator for core security technologies including Microsoft Defender Suite, Entra ID, Conditional Access, and endpoint protection, while also administering enterprise infrastructure across Microsoft 365, Azure, AWS, VMware, and hybrid platforms. Troubleshoot complex infrastructure and security issues, manage cloud backup and disaster recovery, monitor alerts through LogicMonitor and SIEM/MDR/SOCaaS services, and coordinate with security operations teams on investigations and remediation.…See more Requires 8+ years of hands-on experience in cybersecurity and infrastructure engineering in business-critical environments, with deep expertise in Microsoft identity and security technologies, cloud platforms, vulnerability management, and enterprise backup solutions. Participate in after-hours support and escalation activities as needed.

Hands-on IT Infrastructure/System Administrator for a diagnostic company, responsible for maintaining network security, availability, and reliability in a one-person IT environment. Duties include workstation management, end-user support, firewall and backup administration, cybersecurity training, and collaboration with headquarters IT on infrastructure projects.…See more Requires 5+ years of IT experience and proficiency with infrastructure tools such as Office 365, MS SQL Server, VMware, DNS, firewalls (SonicWall, Barracuda), and backup solutions.

As a Network Engineer supporting Naval Information Warfare Center Pacific, you will engineer, configure, and sustain advanced networking equipment (Juniper, Aruba, Cisco) across Navy installations worldwide. You will design secure network architectures, implement RMF and STIG compliance, manage VLANs/routing/VPNs, support wireless deployments, and conduct site surveys and integration testing with 50%+ travel.…See more You must hold an active DoD Secret clearance, meet DoD 8570/8140 certification requirements (Security+ minimum), and have 8+ years of DoD or enterprise network engineering experience with hands-on expertise in Juniper, Aruba, and Cisco platforms.

Sr. Systems Administrator responsible for daily operational management of computer network systems including workstations, file servers, and virtual machines.…See more Duties include installation and maintenance of hardware/software, network security tools (firewalls, anti-virus, intrusion detection), VMware/vSphere environments, storage solutions, and disaster recovery infrastructure. Requires 5+ years systems administration experience, 3+ years network engineering with 2+ years cloud architecture, and must hold or obtain a Top-Secret DoD security clearance. Will create technical documentation, troubleshoot vCenter/ESXI/NSX/storage systems, perform capacity planning, and manage containerized deployments.

Network Engineer responsible for deploying, configuring, troubleshooting, and optimizing enterprise network infrastructure supporting Department of War missions across data centers, campuses, and tactical environments. Will work with routing, switching, security technologies, and systems integration to deliver resilient, secure, and high-performing network solutions.…See more Requires 3+ years of hands-on network infrastructure experience, knowledge of enterprise networking protocols and security technologies, and ability to develop technical documentation and artifacts. Requires Secret clearance and CompTIA Security+ and Cisco CCNA certifications.

A Junior Operating Systems Engineer will build and maintain custom Linux images using Yocto Project (recipes, layers, BitBake, kernel configuration), supporting immutable A/B-updatable OS architectures with secure boot and update tooling. The role involves packaging, integrating, and troubleshooting system services, drivers, and third-party software on embedded x86 hardware, as well as contributing to OS hardening (FIPS mode, secure boot, compliance configuration).…See more Daily use of generative AI tools will accelerate development tasks including recipe writing, test scaffolding, and debugging. The engineer will debug boot, kernel, driver, and userspace issues on real appliance hardware and document build processes, image releases, and provisioning workflows.

Senior Network Engineer supporting mission-critical defense network environments at NIWC Pacific. Responsibilities include engineering, integration, testing, and maintenance of complex Combined Test Bed (CTB) network infrastructure, with emphasis on security, STIG compliance, and multi-cloud connectivity.…See more Required skills span enterprise routing/switching, firewall management, cloud networking across AWS and Azure, and network security technologies including Zero-Trust architectures. Must hold or be able to obtain Active Secret clearance and possess DoD 8570 IAT Level II and networking certifications.

Senior Linux System Administrator supporting a large DOD program in San Diego. Responsibilities include installing, configuring, and supporting LAN/WAN and Internet systems; monitoring network availability; assisting with network modeling, analysis, and planning; and administering network security measures.…See more Requires Bachelor's degree with 4 years of experience (or equivalent), ability to obtain and maintain Secret or Top Secret clearance, strong Linux experience, and Security+ certification.

Senior Network Specialist will install, configure, and support LAN, WAN, and Internet systems for a large DOD program. Responsibilities include routine testing and analysis of network facilities, monitoring network availability, troubleshooting performance issues, and performing maintenance.…See more Requires 6–10 years of networking experience (depending on education level), hands-on expertise with Cisco routers and switches, IPv6 and Layer 3 protocol knowledge, and ability to obtain and maintain a Secret or Top Secret clearance.

The Senior Systems Engineer will design, develop, and support communications and encryption devices, providing technical expertise in cryptographic technologies and deployment strategies. Responsibilities include advising on cryptographic equipment deployment, analyzing emerging threats, conducting technical analysis of cryptographic products for acquisition decisions, liaising with vendors on device lifecycle, and supporting leadership with briefings and fielding decisions.…See more The role requires 5–15 years of cybersecurity, systems engineering, or network security experience, along with strong analytical, problem-solving, and written communication skills. A bachelor's degree in Systems Engineering, Computer Science, or related field is required.

As a Cybersecurity Engineer and Risk Analyst, you will develop and implement security solutions to protect military infrastructure, performing risk and vulnerability assessments across networks, systems, and applications. You will leverage tools like ACAS, STIGs, and eMASS to assess security threats, implement infrastructure controls, and prepare Risk Management Framework (RMF) artifacts and Security Assessment Plans (SAP) for DoD customers.…See more You'll troubleshoot complex cybersecurity challenges, analyze big data security events to identify advanced threats, and communicate technical findings to both technical and non-technical audiences. The role requires 3+ years of IT experience with government/DoD agencies, hands-on RMF and A&A leadership, and an active TS/SCI clearance.

The Navy Integrated Training Environment (NITE) Network Administrator operates, maintains, and troubleshoots network connectivity and infrastructure on the Navy Enterprise Tactical Training Network (NETTN) across multiple classification levels. Working in the Network Operations and Security Center (NOSC), the candidate will support WAN circuits, router and switch configurations, firewall ACLs, VoIP device registrations, cryptographic device configurations, and coordinate with Navy, DISA, and commercial providers for implementation and troubleshooting.…See more Responsibilities include maintaining Information Assurance compliance, IOS upgrades, network device configuration changes, and supporting remote sites in restoring network failures. The role requires technical expertise in LANs, WANs, VPNs, routers, switches, firewalls, and voice communication networks.

As a Cybersecurity Systems Engineer, you will develop and implement security solutions to protect military infrastructure, performing risk and vulnerability assessments across networks, systems, and applications. You'll troubleshoot complex security challenges, manage Navy Risk Management Framework (RMF) and Assessment & Authorization (A&A) activities, and implement cybersecurity controls using tools like ACAS, STIGs, and eMASS.…See more The role requires 3+ years of DoD/government IT experience, expertise in operating systems (Windows, Linux), network infrastructure (routers, switches, firewalls, zero-trust), and compliance testing. You will communicate security findings to both technical and non-technical audiences while identifying advanced threats and supporting Navy missions.

As a Cybersecurity Engineer and Risk Analyst, you will develop and implement security solutions to protect military systems, performing vulnerability assessments, risk analysis, and security compliance testing across networks, systems, and applications. You'll work with DoD Risk Management Framework (RMF) processes, manage security assessment and authorization activities, and use tools like eMASS, ACAS, and STIG scanning to identify threats and implement infrastructure controls.…See more The role requires 4+ years of IT experience with a DoD or government agency, 4+ years leading Navy RMF activities, and 3+ years implementing security controls and performing vulnerability remediation. You'll communicate security complexities to technical and non-technical audiences while supporting critical Navy mission areas.

As a Product Security Engineer 3, you will monitor industry cybersecurity threats and assess their risk to Hologic's diagnostic products, perform vulnerability assessments and security testing, and collaborate with software engineers and field service teams to implement security requirements and qualify networked medical devices. You will develop and automate test procedures for OS patches and anti-virus software, troubleshoot security and network issues in computer-based products, and educate internal teams on network security topics.…See more The role requires a Bachelor's or Master's degree in Computer Science or related field with 4–8 years of experience in computer/network security, Windows and Linux administration, and cybersecurity risk assessment, preferably with medical device or healthcare industry background.

Director leading a pre-sales security engineering team responsible for technical strategy, solution design, and customer-facing support across EVOTEK's cybersecurity portfolio. The role combines deep technical security expertise with people leadership, requiring mentorship of engineers/architects, oversight of enterprise solution design and proof-of-concept engagements, and alignment of technical capabilities with sales and delivery practices.…See more Responsibilities include RFP response, competitive positioning, vendor management, and technical presentations spanning AI security, network security, cloud security, identity & access management, endpoint/XDR, SIEM/SOAR, zero-trust architecture, and data protection. Must understand the VAR business model and translate complex technical capabilities into business value for enterprise stakeholders.