Marengo, Ohio

Andrew Gartner

Senior IT Support Administrator | Okta · Jira Service Management · Active Directory · Jamf MDM

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

Contact Experience Download resume

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.

Now

  • Serving on the Marengo Village Council (Ohio), Jan 2026 – Jan 2030.
  • Open to senior IT support, identity and access, and endpoint management roles.

Skills

Want the details by tool? See the full toolkit.

Provisioning, authentication support, and access troubleshooting.

  • Okta
  • Active Directory

Where I used it

  • Okta: IGS Energy. Provisioning, authentication support, and access troubleshooting. Helped enforce identity verification on every service desk call, using text-message confirmation to known phone numbers on file, to reduce fraudulent requests.
  • Active Directory: School Employees Retirement System of Ohio (large environment support) and The Christian and Missionary Alliance (administration).

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

  • Jira Service Management
  • ServiceNow

Where I used it

  • Jira Service Management: IGS Energy. Primary service desk for intake, triage, and resolution.
  • ServiceNow: School Employees Retirement System of Ohio. Resolved Tier 2–3 tickets.

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

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

Where I used it

  • Jamf MDM: The Christian and Missionary Alliance. Designed and implemented it from the ground up to manage 90 Apple devices, including a company self-service app store, macOS updates, configuration profiles, and security configurations. Jamf Certified Associate (Jamf Pro 10), January 2023.
  • ManageEngine Endpoint Central: UEMS Associate (Security Edition) and Endpoint Central UEM Associate certifications, plus the UEMS Workshop 2025, all June 2025.
  • Device lifecycle: School Employees Retirement System of Ohio. Led the FY25 replacement of 50+ laptops and helped create a streamlined build process that cut a full laptop build from about 5 hours to about 2.

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

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

Where I used it

  • Tier 2–3 support: School Employees Retirement System of Ohio and The Christian and Missionary Alliance.
  • End-user training: delivered software and systems training and trained end users and clients across my roles.
  • Mentoring: MidWest Technical Associates. Supervised and mentored student interns.

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.
    • Helped enforce Okta identity verification on every service desk call, using text-message confirmation to known phone numbers on file, to reduce fraudulent requests.
    • 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 helped create a streamlined build process that cut a full laptop build from about 5 hours to about 2.
    • Partnered with system administrators on organization-wide security.
    • Delivered end-user 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 from the ground up to manage 90 Apple devices, including a company self-service app store, macOS updates, configuration profiles, 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 IT upgrades for Liberty Township’s office of about 20 staff after earlier managed-service arrangements fell short: deployed a VPN for hybrid work, assumed server administration from the prior provider, 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
There was no device management in place for the organization’s Apple devices.
What I did
Designed and implemented Jamf MDM, publishing company apps through a self-service app store and managing updates, configuration profiles, and security settings.
Result
Jamf now manages 90 Apple devices.

School Employees Retirement System of Ohio

Device lifecycle: FY25 laptop replacement

Challenge
A full laptop build took about 5 hours.
What I did
Helped create a new rollout process that was accurate and included only what was needed, and supported the FY25 replacement of 50+ laptops with end-user training.
Result
A full laptop build dropped from about 5 hours to about 2.

IGS Energy

Identity and service desk support at scale

Challenge
Service desk callers needed to be verified to guard against fraudulent requests.
What I did
Administered identity and access in Okta (provisioning, authentication support, access troubleshooting), ran intake, triage, and resolution through Jira Service Management, and helped enforce Okta identity verification on every call, using text-message confirmation to known phone numbers on file.
Result
Fraudulent and spam requests dropped, and the verification step is now standard practice.

Projects

Personal project · Vibe coded

Slotwise logoSlotwise: my own client CRM and scheduling app

What it is
An all-in-one client CRM, scheduling app and website for freelancers and small businesses, built as my own alternative to Dubsado. It covers booking pages connected to Google Calendar with Meet links, clients and a project pipeline, proposals and contracts with e-signatures, forms, invoices with Stripe payments, and automated workflows and reminders.
How I built it
I vibe coded the whole project with an AI assistant, describing what I wanted and iterating until it worked: a Cloudflare Worker backend and website with D1 and R2; Google Calendar integration with Meet links; Stripe payments; multi-user sign-up and Google OAuth verification; and Slotwise 2.3 for Mac, a signed and notarized SwiftUI app built in Xcode with a menu bar and offline support.
Visit SlotwiseDownload for Mac

Certifications

Education

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

Let’s talk

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

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Marengo, Ohio

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