IT SysAdmin
Firstmark Credit Union
We’re looking for a System Administrator who enjoys solving complex problems, strengthening infrastructure, and keeping mission‑critical systems running at peak performance. In this role, you’ll work with minimal supervision to provision, configure, maintain, and continuously improve our IT environment while ensuring reliability, security, and scalability.
You’ll play a hands‑on role across Windows, Microsoft 365, virtualization, and Linux systems, collaborating closely with IT teammates and business partners. Ensure maximum availability, performance, and stability of systems, infrastructure, and applications using proactive monitoring
Provide Tier 2/3 support for escalated and unresolved issues
Perform root cause analysis and partner with incident response teams to implement corrective actions
Maintain thorough documentation and ensure complete follow‑through on projects
Advise on and implement efficiency and performance improvements
Manage and test backup, disaster recovery, and business continuity plans
Respond to data loss incidents and restore systems as needed
Collaborate with Network Administrators, System Administrators, and other IT staff on system design and implementation
Provide guidance and technical support to internal departments
Windows Server Failover Clusters
Microsoft 365 (Azure, Intune, Exchange Online, Teams)
Broadcom (VMware) vSphere environments (vCenter, ESXi, vSAN)
SQL operations and performance
Participate in on‑call rotation, including after hours and weekends
Intermediate expertise in Windows Server administration, including:
Active Directory & Group Policy
Windows Server Failover Clusters
Intermediate expertise with Microsoft 365, including Azure, Intune, Exchange Online, and Teams
Intermediate experience with Broadcom (VMware) technologies (vCenter, ESXi, vSAN)
Intermediate expertise in Linux server administration, including:
SCCM and patch management
Windows imaging and WIM file maintenance
Networking concepts (ARP, DHCP, DNS, subnetting)
SQL administration
Microsoft Certified: Windows Server Hybrid Administrator Associate
Microsoft Certified: Microsoft 365 Certified: Bachelor’s degree in Information Technology or a related field, or at least 2 years of consecutive experience in a related role
On‑call support and flexible hours may be required, including early mornings, late nights, and weekends
Occasional overtime may be necessary
Ability to lift and move equipment up to approximately 40 lbs.
Occasional travel to financial centers may be required
At Firstmark Credit Union, we’re working together with our members to build their tomorrow — and we do the same for our employees. From your first day, you’ll enjoy comprehensive medical, dental, and vision coverage, a dollar for dollar 401(k) match, and up to four weeks of paid time off to rest and recharge. We invest in your growth through education assistance, support your well‑being with our Employee Assistance Program, and encourage you to make a difference with paid and unpaid volunteer opportunities.
#
- ...problems associated with server hardware, applications, and software integration. Configure and manage UNIX and Windows operating systems and installs/loads operating systems software, troubleshoot, maintain integrity of and configure network components, along with implementing...Suggested
$73.45k - $132.78k
...Description The Digital Modernization Sector within Leidos is seeking a System Administrator to support the GIG Service Management – Operations II (GSM-O II) program in San Antonio, TX. We’re seeking a candidate experienced and proficient with Windows server or Linux...SuggestedLocal area- ...Systems Administrator 3 Duration: 6-12 months Location: Denison, TX Remote Work: None Primary Skills: Systems Analysis Notes: Required Skills Job Description The Factory IT Support Analyst Role provides a unique opportunity to support a multitude of...SuggestedWork at officeRemote workShift workWeekend workAfternoon shift
$75k - $113.79k
Description Job Title: Systems Administrator III Clearance Required: Secret Work Location: Onsite, San Antonio, TX Key Responsibilities: Analyze, validate, implement, maintain, and configure current services and tools (examples include Active Directory...SuggestedContract workWork experience placementFlexible hours- ...expertise, project management, technical guidance and direction in the implementation and operation of computer systems; used for financial, clinical and/or administrative systems. Organizes and schedules a variety of major and/or complex computer system tasks, including...SuggestedWork experience placement
$88.4k - $119.6k
...Join to apply for the Mid-Level Systems Administrator role at Boeing Join to apply for the Mid-Level Systems Administrator role at Boeing Get AI-powered advice on this job and more exclusive features. Job Description At Boeing, we innovate and collaborate to make the world...Permanent employmentFull timeInterim roleRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shift- ...this application due to a disability, contact this employer to ask for an accommodation or an alternative application process. System Administrator Full Time DOD ARMY RNEC C4/IT Support, San Antonio, TX, US 7 days ago Requisition ID: 2067 *This position requires a...Civilian ContractorFull timeLocal area
- ...Maximus is seeking an experienced System Administrator to join our team! Maximus TCS (Technology and Consulting Services) Internal Job Profile Code: TCS221, T5, Band 8 Job-Specific Essential Duties and Responsibilities: The System Administrator provides subject matter...Minimum wageContract workTemporary workWork experience placement
- ...services. This role ensures high availability, performance, security, and scalability across all networks, servers, and communications systems. Qualifications Associate or bachelor’s degree in computer science, Information Technology, or closely related field Industry...
- ...Description Applied Research Solutions is seeking a full-time Systems Administrator located at Lackland AFB, Texas. Why Work with us? ? ?Applied Research Solutions (ARS) is respected as a world-class provider of technically integrated solutions as we deliver premier...Full timeFor contractorsFor subcontractorLocal area
$60k - $65k
...facilities across the nation. About This Position The Endpoint Administrator is responsible for the configuration and maintenance of... ...This position tests, installs, and deploys multiple operating systems and applications using industry standard tools, while...Full timeTemporary workWork at officeImmediate startRemote work- ...Senior Systems Administrator-IT Operations The Senior Systems Administrator-IT Operations works under the general direction of the Manager-IT Operations. Responsibilities include planning and designing the data center infrastructure and enterprise storage solutions;...Contract workTemporary workWork experience placement
- ...Senior System Administrator - Tier-3 Level ASRC Federal is a leading government contractor furthering missions in space, public health and defense. As an Alaska Native owned corporation, our work helps secure an enduring future for our shareholders. Join our team and...Contract workFor contractorsWork experience placementWork at officeRemote workFlexible hoursShift work
- ...System Administrator The Digital Modernization Sector within Apriva is seeking a System Administrator to support the DoD Mobility Classified Capability (DMCC) program as part of GSM-O II in San Antonio, TX. This shift is for Sun – Wed 3rd shift 8pm to 6am Primary...Shift workNight shift
- ...Description Position Summary The System Administrator career track (Levels I through III) supports the design, deployment, and ongoing maintenance of client server and storage environments. Each level builds upon the last, with increasing expectations for technical depth...
- ...San Antonio, TX, US Job Title: Enterprise System Administrator - Intermediate (Support Services) Location: San Antonio, TX Education: BS degree in Information Technology, Cybersecurity, Data Science, Information Systems, or Computer Science or Military Training...
$110k - $127k
...SRC, Inc. is currently seeking a certified System Administrator at Lackland AFB in San Antonio, TX. This position will support administration, configuration and maintenance and day-to-day operation of a complex, enterprise-capable, server environments consisting...Full timeLocal areaFlexible hoursShift work- ...Systems Administrator Job Location: United States, Texas, San Antonio. Overview Abacus Technology is seeking a Systems Administrator to provide technical support for the Command, Control, Communication, Intelligence and Networks (C3I&N) Directorate at Lackland AFB. This...Full timeLocal area
- ...University Health is seeking an experienced Systems Administrator with deep UKG Workforce Management expertise to support and enhance mission-critical financial, clinical, and administrative systems within a large, complex healthcare environment. This role is ideal for...
- ...Systems Administrator/Platform Automation Engineer with a minimum 8 years of systems administration, platform engineering, DevOps, SRE, or infrastructure operations experience supporting enterprise or government environments. 5 years of Linux and Windows server or endpoint...
- ...fun. About the team The FIS CardPro LAN team is looking for a highly skilled, experienced, motivated, dedicated, hardworking Systems Administrator at our San Antonio facility at 6550 N Loop 1604 E to help us to fulfill our mission for 2026 and beyond. We currently have 7...
- ...and direction in the implementation and operation of computer systems; used for Community First Health Plans, Inc. (Community First)... ...regulatory compliance. Certifications such as MCSE, RHCE, AWS Certified SysOps Administrator, or similar are preferred. #J-18808-Ljbffr...Work experience placement
- ...Trust (ADP/IT-II) or Tier 3 Investigation (NACLC) The Endpoint System Admin is responsible for architecting, developing, and... ...DoD 8140 Qualification Matrices) 1) Microsoft Certified: Azure Administrator Associate or Windows Server Hybrid Administrator Associate 2)...
- B.E.A.T. Llc. seeks an Intermediate System Administrator in San Antonio to provide enterprise-level endpoint engineering and support for DHA's IT services. The role requires expertise in managing security controls and developing compliance dashboards. The ideal candidate...
- ## System Administrator IApplylocations: San Antonio, TXtime type: Full timeposted on: Posted 2 Days Agojob requisition id: R15579### IBC Bank successes are the result of an aggressive and innovative attitude. The Bank's "We Do More" philosophy reflects its dedication...Full timeBank staffWork at officeFlexible hoursWeekend work
- Job Title: Systems Administrator II Clearance Required: Secret Work Location: Onsite, San Antonio, TX Key Responsibilities Maintain and troubleshoot enterprise level products and services, including hardware (servers) firmware, and software for both on‑premise and MED...Remote workFlexible hours
- SECURITY CLEARANCE TS/SCI with both Polygraphs is required. POSITION Systems Administrator REQUISITION MAR.Texas-SysAdmins-102725 LOCATION San Antonio, Texas JOB DESCRIPTION CSG is searching for a Systems Administrator in San Antonio, Texas to support Enclave Services...
- ...The ideal candidate must hold an active TS/SCI security clearance with polygraph and have experience with UNIX and Windows operating systems. This role involves analyzing and resolving complex server issues, configuring network components, and implementing system...
$80k - $85k
Overview GovCIO is currently hiring for a Systems Administrator with Load balancing (F5) knowledge for an Air Force Intel System. This position will be located in San Antonio, TX and will be an onsite position. Responsibilities Establishes and maintains smooth operation...Full timeCurrently hiringLocal areaFlexible hours$50k
Under limited supervision, responsible for activities related to Systems Administration and the integration with server operating systems and applications. May lead or mentor lower level team members. Applicants local to the San Antonio area are highly preferred. Although...Bank staffLocal areaRemote workFlexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to IT SysAdmin. Be the first to apply!
- remote systems administrator San Antonio, TX
- enterprise administrator San Antonio, TX
- IT infrastructure administrator San Antonio, TX
- system admin San Antonio, TX
- systems administrator San Antonio, TX
- computer systems administrator San Antonio, TX
- server administrator San Antonio, TX
- IT administrator San Antonio, TX
- microsoft systems administrator San Antonio, TX
- application system administrator San Antonio, TX

