Marengo, Ohio

Andrew Gartner

Senior IT Support Administrator · Identity & Endpoint Specialist

15+ years keeping people productive and organizations secure across government, nonprofit, and energy-sector environments.

Contact Experience

About

Senior IT support administrator with 15+ years of experience supporting mid- to large-scale government, nonprofit, and energy-sector organizations.

Most recently supported 3,000+ employees across multiple states at a retail energy company, specializing in Okta identity administration and Jira Service Management. Earlier work spans Active Directory, Jamf MDM, ServiceNow, device lifecycle projects, and end-user training across Windows and macOS.

Skills

Identity & Access

Provisioning, authentication support, and access troubleshooting.

  • Okta
  • Active Directory

Service Management

Ticket intake, triage, and resolution in Jira Service Management and ServiceNow.

  • Jira Service Management
  • ServiceNow

Endpoint & Device Management

Apple and Windows device management, from updates and security configurations to full device lifecycles.

  • Jamf MDM
  • ManageEngine Endpoint Central
  • Windows & macOS
  • Device Lifecycle

Support & Leadership

Tier 2–3 escalation support, user training, and mentoring.

  • End-User Training
  • Tier 2–3 Troubleshooting
  • Mentoring

Impact

  • 15+Years of experience
  • 3,000+Employees supported
  • 50+Laptops replaced in FY25
  • 4Organizations served

Experience

  1. May 2026 – Sep 2026

    Senior Support Administrator

    IGS Energy · Dublin, OH

    • Delivered senior-level IT support to a multi-state retail energy company with 3,000+ employees.
    • Administered Okta identity and access, including provisioning, authentication support, and access troubleshooting.
    • Ran intake, triage, and resolution through Jira Service Management as the primary service desk.
    • Supported distributed staff across multiple states.
  2. Mar 2024 – May 2026

    Senior IT Service Desk Administrator

    School Employees Retirement System of Ohio · Columbus, OH

    • Resolved Tier 2–3 tickets in ServiceNow.
    • Supported a large Active Directory environment.
    • Led device lifecycle work, including the FY25 replacement of 50+ laptops and end-user training.
    • Partnered with system administrators on organization-wide security.
    • Delivered software and systems training.
  3. Jun 2021 – Mar 2024

    Technical Support Specialist

    The Christian and Missionary Alliance · Reynoldsburg, OH

    • Provided Tier 2–3 help desk support and administered Active Directory.
    • Designed and implemented Jamf MDM for Apple devices, including macOS updates and security configurations.
    • Trained end users.
  4. Aug 2011 – Jun 2021

    Technical Manager

    MidWest Technical Associates · Powell, OH

    • Directed hardware and software repair for business clients.
    • Supervised and mentored student interns.
    • Led Liberty Township IT upgrades: deployed a VPN for hybrid work, assumed server administration, and migrated Office 2012 to Office 2019 with streaming solutions.
    • Trained clients.

Community & additional

  • Appointed Member, Marengo Village Council (Ohio): 4-year term, January 2026 – January 2030
  • Appointed Voting Location Manager, Delaware County Board of Elections (2018–2021)
  • Production Director, Rock City Church (2017–2019): livestream and campus technology

Case studies

The Christian and Missionary Alliance

Jamf MDM for Apple devices

Challenge
Apple devices needed consistent management, timely macOS updates, and security configurations.
What I did
Designed and implemented Jamf MDM for the organization’s Apple devices, covering macOS updates and security configurations, and trained end users.
Result
Apple devices came under centralized management with managed updates and security settings.

School Employees Retirement System of Ohio

Device lifecycle: FY25 laptop replacement

Challenge
Laptops across the organization needed to be replaced.
What I did
Led the FY25 replacement of 50+ laptops and delivered end-user training in modern labs.
Result
Staff received new laptops along with training on the new devices.

IGS Energy

Identity and service desk support at scale

Challenge
Give 3,000+ employees across multiple states reliable access and a responsive service desk.
What I did
Administered identity and access in Okta (provisioning, authentication support, access troubleshooting) and ran intake, triage, and resolution through Jira Service Management.
Result
Distributed staff had a single, structured path for access and support requests.

Certifications

  • ManageEngine UEMS / Endpoint Central Security AssociateJune 2025
  • CompTIA A+ ceApril 2025
  • Jamf 100January 2023

Education

  • B.S. Business IT ManagementWestern Governors University · 2016–2021

Let’s talk

Open to conversations about identity, endpoint, and IT service management work.

Marengo, Ohio