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Systems Administrator, Senior

Sentinel Technologies
401(k)
United States, Arizona, Tucson
Jan 10, 2026

Systems Administrator, Senior


Job ID
2026-4937

Type
Contract W-2 FTE



Responsibilities

Sentinel Technologies is seeking a Senior Systems Administrator for one of our partners in Tucson, AZ. As the Senior System Admin, you are responsible for this highly available environment. Your responsibilities will include systems and some network servers, system security and data integrity. The ideal candidate will be able to offer guidance and project direction to staff and management as a subject matter expert. In building out this environment, you will also be tasked with creating process and procedure. This is a long term contract to hire position onsite in Tucson, AZ.



Qualifications

    Must have Bachelor's degree in Computer Science, Information Systems, or a related field; or equivalent experience (10+ years).
  • Must have minimum 5 years of hands-on experience in system administration or IT infrastructure roles.
  • Certifications (Preferred): Microsoft, VMware, Cisco, Nutanix, or Veeam certifications.
  • Must have experience with Server & Virtualization:
    • Hyper-V, VMware (vSphere, ESXi, vCenter), and Nutanix Acropolis
    • Cisco UCS blade management and service profile configuration
  • Experience with Pure Storage, Cisco UCS, Nutanix, HyperV, Broadcom and Veeam as this is a part of their technology stack.
  • Design and deploy Microsoft-based systems including Windows Server, Active Directory, Exchange environments.
  • Develop and implement system configurations, procedures, and guidelines for the Microsoft environment.
  • Plan and execute system upgrades, migrations, and expansions.
  • Manage and maintain Windows Server environments, including installation, configuration, and troubleshooting.
  • Administer and support Active Directory, Group Policy, DNS, DHCP, and other related services.
  • Oversee Exchange Server operations, ensuring email system stability and security.
  • Develop and maintain system documentation, operational procedures, and training materials.
  • Participate in on-call rotation
  • The candidate must have a car, as this position requires travel between location and the transportation of equipment
  • A valid driver's license and proof of vehicle insurance will be required
  • Legally authorized to work in the US without sponsorship
  • Must demonstrate a "can-do" attitude

We focus on candidates that display our "ACE" factor - Attitude, Compassion, and Enthusiasm to deliver quality solutions with exceptional customer service.

What you get:

We offer weekly competitive pay, medical, dental, vision, 401K and more.



Overview

MOTIVATED.....make IT happen!

Sentinel Technologies, Inc. has been rated a top workplace every year since 2012!

About Us:

Sentinel delivers solutions that can efficiently address a range of IT needs - from security, to communications, to systems & networks, to software applications, to cloud and managed services; all of which include our staffing solutions for our clients. Since 1982, Sentinel has grown from providing technology maintenance services to our current standing as one of the leading IT services and solutions provider in the US. We have aligned with many of today's global technology leaders including Cisco, Dell, VMware and Microsoft. Sentinel services customers both nationally and internationally with primary support operating centers in Downers Grove (HQ), Chicago, and Springfield, IL; Phoenix, AZ.; Lansing, and Grand Rapids, MI; Milwaukee, WI; and Denver, CO.

If you are MOTIVATED... you can make IT happen at Sentinel. Our commitment to our employees is to create a work environment that encourages creativity, an entrepreneurial spirit, fosters growth through certification and hands-on training, and values a team-oriented culture with rewards based on impact!

If you share our passion about what technology can do and want to be part of a top workplace environment - we'd like to have you join our team. Learn more at www.sentinel.com/careers.

As part of Sentinel's employment process, candidates will be required to complete a background check. Only those who meet the minimum requirements will be contacted. No phone calls please.

Sentinel is proud to be an equal opportunity employer including disability and veterans. In accordance with Title VII and state regulations, all qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, marital status, pregnancy, genetics, disability, military, veteran status or any other basis protected by law.

If you are an individual with a disability and need assistance in applying for a position, please contact SentinelHR1@sentinel.com.

The "Know Your Rights" Poster is available here

https://www.eeoc.gov/sites/default/files/2023-06/22-088_EEOC_KnowYourRights6.12ScreenRdr.pdf

Sentinel EEO Policy Statement is available here.

https://www.sentinel.com/about/diversity



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