network-security jobs in San Diego

Lead IT operations and infrastructure for RIVO Holdings as a hands-on IT Manager, overseeing a small team while maintaining active involvement in day-to-day support. Manage company hardware, software, network infrastructure, cloud platforms (Microsoft 365, Azure, Entra ID, Intune), and security systems including Fortinet firewalls.…See more Responsibilities include team leadership and development, infrastructure administration, security and compliance, cloud and network administration, and vendor management. Requires 5+ years of systems and network administration in a Microsoft environment, 2+ years of supervisory experience, and expertise in endpoint management, disaster recovery, and troubleshooting.

Design and evolve enterprise network architectures for a large university, including wired, wireless, core, WAN/Internet, data center, and cloud-connected networks. Lead complex infrastructure projects from requirements through deployment, serve as technical escalation resource for routing, switching, and connectivity issues, and develop network standards and runbooks.…See more Mentor junior engineers and evaluate emerging networking, cloud, wireless, automation, and security technologies. Required expertise in large-scale enterprise networks, advanced routing/switching (BGP, OSPF, IPv4/IPv6), enterprise platforms (Aruba, Palo Alto Networks, Infoblox, ClearPass), network observability, and project leadership.

A senior engineer responsible for designing, implementing, and managing Zscaler zero-trust security solutions across the organization's network infrastructure. The role involves monitoring security configurations, conducting risk assessments, responding to security incidents, ensuring compliance with standards like GDPR and HIPAA, and providing guidance to internal teams.…See more Requires 3+ years of network security experience, deep knowledge of Zscaler (ZIA and ZPA), network security best practices, and familiarity with compliance frameworks and cloud platforms.

The Network Administrator will operate, maintain, and troubleshoot network connectivity and infrastructure on the Navy Enterprise Tactical Training Network (NETTN), supporting multiple networks across different classification levels. Responsibilities include managing routers, switches, firewalls, WAN circuits, VoIP devices, and cryptographic configurations; coordinating with Navy, DISA, and commercial providers; maintaining Information Assurance compliance; and providing helpdesk support from the Network Operations and Security Center (NOSC).…See more The role requires hands-on expertise in network hardware, software interconnection, and troubleshooting of network failures at remote sites.

Senior Network Engineer/Architect responsible for designing, engineering, and modernizing large-scale enterprise wired, wireless, core, WAN, data center, and research network architectures at a major university. Lead complex infrastructure projects from requirements through deployment, serve as senior escalation for advanced routing, switching, wireless, and performance issues, and provide technical direction to engineering teams.…See more Develop architecture standards, reference designs, and technical runbooks while evaluating emerging networking, cloud, wireless, automation, and security technologies. Requires deep expertise in enterprise routing/switching (BGP, OSPF, IPv4/IPv6, segmentation, high availability), hands-on network observability and packet analysis, and proven success leading large-scale network modernization and lifecycle initiatives.

The Cybersecurity Engineer will coordinate cybersecurity activities including preparation and maintenance of Risk Management Framework (RMF) artifacts, risk and vulnerability assessments across network/system/application domains, and day-to-day cyber operations. The role requires performing compliance testing, implementing security controls and policies, working with tools like eMASS and ACAS, and developing security documentation for DoD/government systems up to TS/SCI classification.…See more The candidate must work independently, identify risks and devise mitigation solutions, and communicate findings to both technical and non-technical stakeholders. A bachelor's degree and DoD 8140 qualification (equivalent to former DoD 8570 IAT II) are required, along with 3+ years in cybersecurity, T&E, or Authorization & Accreditation roles.

This role provides engineering sustainment and support for fielded shipboard networks, with a focus on Cisco ISE/NAC solutions, network security (STIGs), and automation. The engineer will troubleshoot and maintain multiple Cisco platforms (routers, switches, firewalls, wireless), develop Ansible playbooks and PowerShell scripts for network automation, and support Navy CANES and related environments.…See more The position requires hands-on experience with Cisco ISE, network security fundamentals, automation tooling, and familiarity with Agile/DevOps practices and change management workflows.

As a Senior Platform Engineer at ReflexAI, you will design and maintain multi-cloud infrastructure across GCP and AWS using Terraform, Kubernetes, and GitHub, while building golden paths and guardrails that improve developer velocity. You'll own observability and monitoring with Datadog, strengthen security posture through IAM and container security best practices, and establish compliance workflows for SOC 2, HIPAA, and other industry standards.…See more This is a hands-on role requiring 5–7+ years of DevOps/SRE/platform engineering experience, deep cloud expertise, and CI/CD pipeline proficiency. You'll work cross-functionally to reduce operational toil and support an AI-driven product serving crisis support, healthcare, and enterprise customers.

Senior Systems Engineer responsible for planning and implementing security patches across enterprise Linux and Windows server environments in AWS, Azure, and hybrid infrastructure. Design and operate automation platforms (AWS Systems Manager, Ansible, SCCM/Intune) to scale vulnerability management and remediation across cloud and on-premises fleets.…See more Partner with security, infrastructure, network, and compliance teams on patch testing, deployment sequencing, rollback procedures, and audit-ready documentation in a regulated (GxP/SOX/21 CFR Part 11) environment.

Design, architect, and evolve highly available enterprise network infrastructure across wired, wireless, core, WAN, data center, and cloud environments. Lead complex Layer 2/3 engineering including routing, switching, segmentation, and high-availability systems; serve as technical escalation for advanced troubleshooting and root-cause analysis.…See more Direct university-wide network modernization projects from requirements through deployment and operational transition, coordinating across IT teams, campus partners, vendors, and service providers. Develop network architecture strategies, multi-year roadmaps, standards, and provide technical mentorship to junior engineers.

Senior network architect and engineer responsible for designing, evolving, and modernizing SDSU's enterprise wired, wireless, core, WAN, data center, and research networks. Lead complex infrastructure projects from architectural design through deployment and operational transition, serve as technical escalation resource for advanced routing, switching, and wireless issues, and mentor network engineering staff.…See more Required skills include large-scale enterprise network architecture, advanced routing/switching (BGP, OSPF, IPv4/IPv6, segmentation, high availability), hands-on packet/protocol analysis, RF engineering, and vendor platform expertise (Aruba, Palo Alto Networks, Infoblox, ClearPass). Develop architecture standards, technical documentation, and evaluate emerging networking technologies.

Senior Network Engineer responsible for diagnosing and resolving complex network issues across a large enterprise airport infrastructure, including wired, wireless, and data center environments. Design and lead technical projects, develop enterprise system documentation and architecture, and support disaster recovery, compliance, and security assessments.…See more Maintain detailed network diagrams, standard operating procedures, and serve as a hands-on technical lead coordinating with vendors and stakeholders. Participate in on-call rotations for critical network operations.

This role combines incident response, forensic analysis, and security operations responsibilities, requiring hands-on experience with cybersecurity tools, patch management, and security system optimization. The analyst will develop automation scripts (Python, PowerShell, Bash), manage firewalls and VPN systems, leverage network observability and security telemetry for threat detection, and support incident response workflows.…See more The position demands 2–5 years of progressive cybersecurity experience, intermediate certifications (GSEC, CEH, CySA+), and familiarity with NGFW technologies, cloud platforms (AWS, Azure), and security frameworks.

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 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.

This role supports mission-critical network operations for U.S. Navy RDT&E infrastructure, requiring 10+ years of enterprise network engineering experience.…See more 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.