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System Administrator II

Job in Tulsa, Tulsa County, Oklahoma, 74145, USA
Listing for: JMARK - IT Support and IT Services
Per diem position
Listed on 2026-08-30
Job specializations:
  • IT/Tech
    IT Support, Systems Administrator, Technical Support, Network Administrator
Salary/Wage Range or Industry Benchmark: 55000 - 70000 USD Yearly USD 55000.00 70000.00 YEAR
Job Description & How to Apply Below

JMARK is a leading provider of managed IT services, cybersecurity solutions, cloud technologies, and strategic IT consulting. Founded on the principle of People First. Technology Second., JMARK partners with businesses to transform technology into a true driver of growth, resilience, and competitive advantage.
With a focus on proactive strategies, exceptional customer experience, and business value
, JMARK helps organizations reduce risks, increase efficiency, and plan for the future. Our team combines technical expertise with a people-centric approach, ensuring that every solution aligns with client goals, culture, and long-term success.
At the heart of JMARK’s philosophy are our core values:

  • Honesty – honoring commitments and building trust
  • Passion – loving what we do and where we do it
  • Teamwork – working together to prevent problems and create solutions
  • Excellence – exceeding expectations through initiative and follow-through
  • Accountability – doing what we say we will do
  • Fun – celebrating success and enjoying the journey
For more than three decades, JMARK has served as a trusted IT partner across industries, helping businesses thrive with secure, reliable, and future-ready technology solutions.
The Opportunity
Are you an experienced IT professional who enjoys solving more complex technical problems, taking ownership of client environments, and helping other technicians grow?
JMARK Business Solutions is looking for a System Administrator II to join our team as a dedicated onsite IT resource for one of our banking clients. You will be a JMARK employee while working primarily onsite at the client's location, serving as a trusted technology partner and working closely with the broader JMARK technical team.
This position goes beyond traditional desktop support. You ll troubleshoot escalated technical issues, support servers and network infrastructure, identify recurring problems before they create larger disruptions, help maintain the overall health of the client's technology environment, and provide guidance to Level 1 technical resources.
At JMARK, we believe in People First. Technology Second. We re looking for someone who understands that technical expertise is most valuable when it helps people work effectively and businesses operate successfully.
What You ll Do
As a System Administrator II, you ll provide advanced onsite and remote support while taking greater ownership of the client s technology environment.
Your Responsibilities Will Include
  • Provide responsive, professional onsite and remote technical support.
  • Troubleshoot and resolve escalated technical issues from Level 1 resources.
  • Identify, document, troubleshoot, and resolve workstation, server, network, application, and connectivity issues.
  • Manage, maintain, troubleshoot, and support client network infrastructure.
  • Maintain the health and efficiency of service queues, team boards, and client systems.
  • Review tickets and client environments to identify recurring or systemic technology issues.
  • Identify proactive solutions and either implement them or escalate more complex issues to Level 3 resources.
  • Ensure Routine Health Assessments are completed and assist Level 1 team members in meeting RHA requirements.
  • Assist with scheduling service cases and onsite work as needed.
  • Partner with Service and Project Managers on client-related projects.
  • Perform preventative maintenance, installations, upgrades, migrations, and technology deployments.
  • Accurately document technical work and resolutions within Connect Wise and other JMARK systems.
  • Review Level 1 ticket documentation to help ensure accuracy, completeness, and quality.
  • Recommend appropriate technology changes through JMARK's change-management processes.
Technical Responsibilities
This position will work across a variety of technologies and environments. You should be comfortable troubleshooting and supporting technologies including:
  • Microsoft Windows operating systems.
  • Microsoft Office and Microsoft 365.
  • Windows Server 2012 through 2019 environments.
  • Active Directory and advanced troubleshooting tools, including ADUC, RSOP, DCDiag, and DFUtil.
  • VMware and Hyper-V virtualization environments.
  • Windows virtual machines.
  • Remote…
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