linux-administration jobs in San Diego

Senior systems administrator responsible for providing technical guidance and coordination across infrastructure, security, and engineering teams in a mission-focused environment. Will mentor administrators and end users, document technical solutions, and lead issue resolution across Windows/Linux systems, virtualization, networking, and cloud platforms.…See more Requires extensive experience in enterprise/government IT infrastructure, system hardening, cybersecurity compliance (CMMC, DISA STIG), and strong communication with technical and non-technical stakeholders.

As a Cybersecurity Engineer and Risk Analyst, you will develop and implement security solutions to protect military infrastructure, performing vulnerability and compliance assessments using industry-standard tools like eMASS and ACAS. You'll troubleshoot complex security challenges, assess network and system threats, implement infrastructure controls, and communicate security risks to both technical and non-technical audiences.…See more The role requires 3+ years of experience leading Risk Management Framework (RMF) activities for DoD projects, vulnerability scanning, and security control implementation. You'll work closely with Navy missions to identify cyber risks, recommend solutions, and provide hands-on support using your knowledge of cybersecurity policy, networks, system infrastructure, and risk management.

Build and maintain AWS cloud infrastructure (EC2, VPCs, security groups, storage) using Infrastructure as Code with CloudFormation. Operate Kubernetes/OpenShift container platforms and manage application lifecycle.…See more Support web application stacks (React, Node.js, PostgreSQL) and implement authentication via OpenID Connect, SAML, and LDAP/AD. Monitor systems using CloudWatch and distributed tracing tools.