Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Systems Administrator

Infracore

ABOUT US:

Founded in 2003, Infracore provides high-touch, end-to-end IT infrastructure support for mid-sized and enterprise, technology-focused organizations. We combine deep technical expertise with strategic guidance to help our clients scale securely and efficiently to drive performance and resilience.

We believe great work starts with great people. Our culture is built on collaboration, continuous growth, and a shared core values of Integrity, Trust, and Commitment , empowering our team to do their best work and grow their careers. We are deeply invested in helping both our clients and our team members succeed.
THE ROLE:

We're looking for a Systems Administrator who thrives in complex, fast-paced environments and is ready to take ownership of enterprise IT infrastructure across multiple client environments.

This is a highly impactful role where you'll act as a technical leader supporting critical systems, driving projects, mentoring team members, and partnering closely with IT leadership.
WHAT YOU'LL DO:

Infrastructure & Systems Management
  • Manage and optimize Microsoft 365, Windows Server, Active Directory, and cloud platforms (Azure/AWS)
  • Maintain enterprise systems (SAN, firewalls, virtualization, networking)
  • Perform ongoing maintenance (patching, backups, upgrades, monitoring)
  • Implement high-availability and redundancy solutions
Project Leadership
  • Lead 1-2 concurrent IT infrastructure projects (migrations, deployments, office moves)
  • Support IT Managers/Directors with planning, execution, and resource coordination
  • Contribute to system standardization and improvement initiatives
Advanced Support & Escalation
  • Serve as the highest level of technical escalation
  • Troubleshoot complex system and network issues
  • Work directly with vendors and stakeholders during critical incidents
Security & Compliance
  • Champion cybersecurity best practices (MFA, least privilege, monitoring)
  • Conduct risk assessments and support compliance initiatives (CIS, NIST, etc.)
  • Provide input into IT strategy, budgeting, and optimization
Client & Team Collaboration
  • Build strong relationships with clients and internal teams
  • Mentor junior IT staff and support training efforts
  • Participate in a collaborative, high-accountability culture
WHY JOIN INFRACORE?
  • Work on high-impact enterprise environments
  • Collaborate with a skilled, supportive IT team
  • Gain exposure to advanced technologies and cybersecurity practices
  • Be part of a values-driven culture focused on growth and accountability
Requirements

5+ years of experience in systems administration or enterprise IT


Strong expertise in:
  • Microsoft 365 (Exchange Online, Teams, SharePoint, Intune, Entra ID)
  • Active Directory (GPOs, OU design, LDAP)
  • Windows Server (DNS, DHCP, DFS, NPS)
  • Networking (TCP/IP, DNS, VPNs, routing)
  • Virtualization (VMware or Hyper-V)
  • Cloud platforms (Azure)
  • Backup solutions (e.g., Veeam, Azure Backup)
  • PowerShell scripting
Preferred:
  • Experience with security tools (Nessus, nmap, etc.)
  • Knowledge of cybersecurity frameworks (CIS, NIST)
  • Familiarity with compliance standards (SOX, HIPAA, CCPA, ISO)
  • Exposure to Linux environments
Benefits
  • Medical, Dental & Vision
  • Life & Long-Term Disability Insurance
  • 401(k) Matching
  • Paid Time Off & Holiday Pay
  • Professional Development
  • Leadership Coaching
  • Certification Reimbursement
  • DoorDash Annual DashPass
  • Columbia Sportwear Employee Discount
  • Company Social Events
Vacancy posted 6 days ago
Similar jobs that could be interesting for youBased on the Systems Administrator in San Diego, CA vacancy
  •  ...Job Title : IT System Administrator Location : San Diego, CA(Onsite) Project description This role supports daily IT operational activities across multiple technology domains. The resource will provide hands-on assistance with PLM systems, desktop/end-user... 
    Suggested
    Work experience placement
    Work at office
    Remote work

    Futran Tech Solutions Pvt. Ltd.

    San Diego, CA
    1 day ago
  • $98.11k - $147.16k

     ...solutions. From software-defined radios to cutting-edge cryptographic systems and avionics, everything we build powers the next era of New...  ..., together. A DAY IN THE LIFE: As an IT Systems Administrator III , you’ll lead advanced system administration, security enforcement... 
    Suggested
    Remote work
    Work visa
    Flexible hours

    Innoflight Inc

    San Diego, CA
    6 days ago
  •  ...IT System Admin This role supports daily IT operational activities across multiple technology domains. The resource will provide...  ...PLM systems, desktop/end-user support, Active Directory, server administration, phone system maintenance, new-hire onboarding, and executive... 
    Suggested

    Futran Tech Solutions Pvt. Ltd.

    San Diego, CA
    1 day ago
  • $107.51k - $140k

     ...fleet. With a holistic approach to life-cycle maritime defense systems-from small watercraft to submarines, surface combatants and...  ...Are The Navy Integrated Training Environment (NITE) System Administrator is responsible for the administration, maintenance, and cybersecurity... 
    Suggested
    Full time
    Work experience placement
    Work at office
    Local area
    Worldwide

    Huntington Ingalls Industries

    San Diego, CA
    3 days ago
  • $90k - $125k

     ...Position Title: Systems Administrator Location: San Diego, CA Status: Full-time / On-site Required Clearance: Secret Required Certification(s): IAT Level II (Security+, CySA+, etc.) About Us: RTL Networks, Inc. is a rapidly growing company primarily... 
    Suggested
    Full time
    Work experience placement
    Local area
    Remote work

    RTL Networks

    San Diego, CA
    1 day ago
  • $61.9k - $141k

     ...Systems Administrator The Opportunity: Your combination of people skills and system administrator expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting our team, clients, and... 
    Full time
    Contract work
    Part time
    Work at office
    Local area
    Remote work

    BOOZ, ALLEN & HAMILTON, INC.

    San Diego, CA
    5 days ago
  • $70k - $120k

     ...Saalex Corporation  is seeking multiple  System Administrator II in Tidewater, VA and San Diego, CA.  Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test Range Operations and Management, Engineering and Logistics Services,... 
    Contract work
    Temporary work
    Local area
    Flexible hours

    Saalex

    San Diego, CA
    1 day ago
  •  ...responsibilities and opportunities for professional growth. Position Description Job Title / Labor Category Title Systems Administrator Location San Diego, CA US (Primary) Security Clearance Requirements Must be Able to Obtain a Clearance Job... 
    Contract work
    Temporary work
    Local area
    Remote work

    Sellers & Associates, LLC

    San Diego, CA
    15 hours ago
  • $107.74k - $120.75k

     ...Family: IT Infrastructure and Operations Job Qualifications: Skills: Netapp Storage Area Network (SAN) Administration, Unix System Administration, Windows System Administration Certifications: CompTIA Security+ CE | CompTIA - CompTIA Experience... 
    Temporary work
    Local area
    Immediate start
    Remote work
    Worldwide
    Flexible hours

    General Dynamics Information Technology

    San Diego, CA
    4 days ago
  •  ...Position Description & Qualifications Looking for a Systems Administrator opportunity at a place you can make a difference every day? Discover this great opportunity in our Diego Garcia location. Bring your expertise and collaborative skills to make an impact towards... 
    Full time
    Contract work
    Part time
    Work experience placement
    Local area
    Immediate start
    Overseas
    Flexible hours

    Serco

    San Diego, CA
    1 day ago
  • $75 - $90 per hour

     ...We are seeking a System Administrator, Service Management to support and optimize our Service Management platform used by IT and business teams. This role serves as the platform expert, ensuring system stability, integrations, automation, and continuous improvement.... 
    Hourly pay
    Temporary work
    Local area

    LHH Recruitment Solutions

    San Diego, CA
    3 days ago
  • $60k - $105k

     ...Saalex Corporation  is seeking multiple  System Administrator I in Tidewater, VA and San Diego, CA.  Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test Range Operations and Management, Engineering and Logistics Services, Data... 
    Contract work
    Temporary work
    Local area
    Flexible hours

    Saalex

    San Diego, CA
    1 day ago
  • $124k - $154k

     ...solutions. This role demands the ability to quickly evaluate core systems and optimize them into scalable, forward-looking solutions....  ...advanced troubleshooting and root cause analysis • Provide administration and performance optimization of Azure services, including... 
    Full time
    Local area
    Flexible hours
    Shift work

    Bumble Bee

    San Diego, CA
    15 hours ago
  • $97.01k - $164.91k

     ...Those Who Move the World.” Sound like a team you want to be a part of? Come build your career with BAE Systems. Seeking an experienced IT systems administrator to support our San Diego, CA classified lab environments with expertise in setting up and managing... 
    Full time
    Local area

    BAE Systems USA

    San Diego, CA
    4 days ago
  • $95k - $130k

     ...Job Type Full-time Description System Administrator REQ CompQSoft is seeking a highly motivated and technically proficient System Administrator to maintain the operational readiness and security posture of critical information systems supporting CNIC... 
    Full time
    For contractors
    Night shift

    CompQsoft

    San Diego, CA
    1 day ago
  • $76.7k - $129.5k

     ...Applicants. POSITION SPECIFICS We are searching for an experienced, organized, positive, and self-motivated Infrastructure Systems Administrator to join our DevSecOps Department within the Joint Mission Integration and Experimentation (JMIE) Division at the Applied... 
    Full time
    For contractors
    Work experience placement
    Remote work
    Work from home
    Flexible hours

    Penn State University

    San Diego, CA
    15 hours ago
  •  ...Overview We are seeking a mission-focused Systems Administrator to support Navy enterprise IT environments. This role is responsible for maintaining servers, networks, and cybersecurity compliance across classified and unclassified systems. You'll work closely with... 

    Kros-Wise

    San Diego, CA
    3 days ago
  •  ..., is one of the world’s leading resources for high-technology systems development ranging from the nuclear fuel cycle to remotely piloted...  .... We are seeking an ambitious Scientific Computing Administrator for the GA Energy Group to support the physicists and researchers... 
    Full time
    Part time
    Work experience placement
    Local area
    Remote work
    Visa sponsorship
    Relocation package

    General Atomics

    San Diego, CA
    6 days ago
  • $90k - $110k

     ...Systems Administrator (ERP) Location US-CA-San Diego Category Accounting/Finance Position Type Full Time Regular What we are looking for We are looking for an ERP Systems Administrator who will be the primary technical expert... 
    Full time
    Work at office

    SCS Engineers

    San Diego, CA
    3 days ago
  •  ...Systems Administrator The position of Systems Administrator will be responsible for the performance, availability, and reliability of SDCCU's information technology infrastructure serving both SDCCU's employees and customers. Maintain high quality service and production... 
    Full time

    San Diego County Credit Union

    San Diego, CA
    1 day ago
  •  ...The Systems Administrator provides enterprise IT and network infrastructure support to the Naval Surface Warfare Center (NSWC) . This role is responsible for the administration, maintenance, security, and performance of Government information systems supporting mission... 
    Local area
    Remote work

    The Leading Niche

    San Diego, CA
    4 days ago
  •  ...Position Description & Qualifications Looking for a System Administrator position at a place you can make a difference every day? Discover this great opportunity in our San Diego, CA location. Bring your expertise and collaborative skills to make an impact toward... 
    Full time
    Contract work
    Part time
    Work at office
    Local area
    Immediate start
    Flexible hours

    Serco

    San Diego, CA
    1 day ago
  • $135k - $145k

     ...core competencies in Information Assurance, Cybersecurity and Systems Engineering. With offices on both the East and West coasts, an...  ...benefits, opportunity abounds for the right individual! Systems Administrator - 26-014 - San Diego, CA As a growing Department of... 
    Full time
    For contractors

    AUSGAR Technologies

    San Diego, CA
    15 hours ago
  •  ...A client in San Diego is looking for a Systems Administrator/Network Engineer to manage their existing server and network environment. We are looking for someone with experience managing/maintaining/upgrading multiple types of servers, Active Directory, VPNs, and networking... 

    Insight Global

    San Diego, CA
    1 day ago
  •  ...Systems Administrator Location: Dahlgren, VA / San Diego, CA / Norfolk, VA (3 different locations) *Clearance: Active Secret w/ Polygraph needed to apply* Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities... 
    Remote work

    Cornerstone Defense

    San Diego, CA
    6 days ago
  •  ...Overview Client First Technologies is currently seeking a Systems Administrator to support an upcoming contract. The Systems Administrator provides technical expertise supporting the operation, maintenance, and security of enterprise IT systems. This role ensures... 
    Full time
    Contract work

    Client First Technologies

    San Diego, CA
    2 days ago
  •  ..., is one of the world's leading resources for high-technology systems development ranging from the nuclear fuel cycle to remotely piloted...  .... General Atomics is seeking to hire a driven Atlassian Administrator to join our IT Operations / GAWorks Agile Operations team,... 
    Hourly pay
    Full time
    Part time
    Work experience placement
    Work at office
    Local area
    Remote work
    Relocation package
    Weekend work

    General Atomics

    San Diego, CA
    4 days ago
  • Summary The Systems Administrator II/VDI Engineer supports the design, configuration, and sustainment of the Virtual Desktop Infrastructure (VDI) environment used across PMW 790's STACC enterprise. This role ensures secure, reliable, and efficient desktop virtualization... 
    Remote work

    Information Management Resources, Inc.

    San Diego, CA
    4 days ago
  • Junior Systems Administrator/System Engineer Leidos has a new and exciting opportunity for a Junior Systems Administrator/System Engineer in our Intel Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer... 
    Immediate start
    Flexible hours

    Via Logic LLC

    San Diego, CA
    1 day ago
  • $107.51k - $140k

    Senior Systems Administrator (Systems Administrator 4) - 28577 Requisition Number: 28577 Required Travel: 0 - 10% Employment Type: Full Time/Salaried/Exempt Anticipated Salary Range: $107,507.00 - $140,000.00 Security Clearance: Secret Level of Experience: Mid Who... 
    Full time
    Work at office
    Local area

    Huntington Ingalls Industries

    San Diego, CA
    1 day ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Systems Administrator. Be the first to apply!