windows-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.

Support the implementation, monitoring, and maintenance of security controls across endpoint, identity, and Microsoft 365 environments at a pharmaceutical company. Responsibilities include monitoring security alerts, managing endpoint security in Microsoft Intune, maintaining device compliance policies, investigating security issues, and automating tasks with PowerShell.…See more The role requires a foundational background in IT support, system administration, or security operations, with 1+ years of experience and hands-on exposure to Microsoft Defender Portal, MDM/MAM policies, and security investigation.

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.

This role provides IT risk management and cybersecurity oversight for a large, multi-location enterprise environment. Key responsibilities include triaging security alerts and IOCs, conducting IT security audits (network, OS, data center), administering Microsoft 365 Defender for Cloud and endpoint protection platforms, managing vulnerability assessments, and assisting with cloud migrations to Azure and Microsoft 365 services.…See more The role requires 5+ years of IT experience in large environments, IT audit experience, Security+ or Cloud+ certification, and hands-on administration of Active Directory, SIEM tools, and service-desk ticketing systems.