Resume
Sydney NSW

Theo Mihas

  • IT Systems and Support
  • Automation and Internal Tools
  • Mobile Device Management
  • Networking
  • Cloud

IT professional in Sydney with hands-on experience across systems administration, networking, mobile device management and automation. I manage Microsoft 365 and Google Workspace, Windows and Linux systems, Cisco Meraki networks and a fleet of 150+ Android handhelds. I also design, build and maintain internal web applications that replace manual processes for operations, HR, logistics and IT teams.

Download resume See what I've built Contact
  • 12internal web apps I designed, built and run
  • 80%better efficiency and productivity since my apps rolled out
  • 150+Android handhelds and label printers I manage
  • 4 weeksto roll out 150+ handheld label printing kits to stores

Experience

  1. Sydney Tools

    Roselands NSW
    Feb 2025 to now
    • 1,000+staff supported
    • 115+stores on the network
    • 150+Android handhelds in WMDS

    IT Support, Automation and Internal Tools

    Dec 2025 to now
    • Escalation point for networking, Windows and Linux, Odoo ERP, the phone system, email security and the handheld fleet. I take on 50+ escalated tickets a week, troubleshoot the faults and work with internal teams and vendors through to resolution.
    • Create users, assign licences and reset passwords in the Microsoft 365 admin centre, fix Office apps on staff PCs, and administer Google Workspace users, groups, shared drives and 2-step verification resets.
    • Set up and remove access for starters and leavers in Google Workspace, Odoo and RingCentral, and issue, revoke and audit building access tags across sites.
    • Look after the Cisco Meraki network across all 115+ stores: set up new sites, configure DHCP, Wi-Fi, firewall rules, site-to-site VPNs and switch ports, and troubleshoot connectivity.
    • Own the fleet of 150+ CipherLab Android handhelds and Brother label printers in WMDS. I provision each store kit end to end, run the WMDS server and troubleshoot devices remotely, with PowerShell scripts for diagnostics and maintenance.
    • Led the national move from laptop-based price changes to handheld label printing: 150+ kits to stores within 4 weeks, with release checks, store communications, training guides and issue follow-up.
    • Test each mobile app release with the in-house developers: write test cases, run QA and UAT on real hardware, reproduce defects and sign off APK builds before rollout.
    • Design, build and run 12 internal web apps on Cloudflare Workers and BigQuery, deployed from GitHub with single sign-on for staff, replacing spreadsheets and Apps Script tools. See the projects
    • Built the IT team's Gmail ticketing system in Google Apps Script (automatic ticket numbers, acknowledgements, label-based assignment, threaded replies and activity logging) and a Google Sheets to BigQuery pipeline that feeds the team's KPI dashboard.
    • Write the knowledge base guides and rollout notices staff work from, and trained a new helpdesk team member.
    Also administerOdoo ERPRingCentralNoahFaceBarracudaWordPress

    IT / Helpdesk Officer

    Feb 2025 to Dec 2025
    • First-line IT support for head office and store staff: Windows PCs, user accounts, business applications, printers, scanners, iPads, POS equipment and connectivity.
    • Supported store handhelds in WMDS, and logged, triaged and escalated incidents to the wider IT team and vendors through to resolution.
    • Documented recurring faults and found the manual processes that later became automation and internal tools.

  2. Mwave Australia

    Sydney NSW
    Jul 2022 to Mar 2025

    Customer Service Officer

    • Advised customers face to face and by phone on specifications and compatibility, and resolved their technical queries.
    • Handled a high volume of Zendesk tickets, returns (RMAs) and order collections, and streamlined the pick-up and collect process.

  3. Cenoptic

    Sydney NSW
    Aug 2022 to Jan 2024

    Front End Developer (part-time)

    • Built email enquiry handling into the website, connected front-end pages to back-end services and checked cross-browser compatibility.

Education

Education

Bachelor of Information Technology

University of Technology Sydney, graduated December 2024

Home lab

Proxmox, Docker and Ubuntu Linux

I run a Proxmox home lab with Docker containers on Ubuntu Linux, managed in Portainer and published through Cloudflare Tunnels, and build personal web apps in Python (FastAPI) and React with GitHub Actions CI/CD.

Skills

Support

Service deskHelp deskTroubleshootingIncident managementTicketing (Zendesk, Gmail queues)End-user and desktop supportDocumentationVendor escalationQA and UAT

Endpoint and MDM

WMDSAndroid fleet provisioningAPK deploymentRemote supportWindows 10 and 11Microsoft Office appsiPad and POS support

Systems and networking

Microsoft 365 admin centreGoogle Workspace adminWindows administrationLinux (Ubuntu)Cisco MerakiDHCP, Wi-Fi, firewall rulesSite-to-site VPNBarracuda email securityBuilding access control

Cloud and data

Cloudflare WorkersD1, KV and R2Durable ObjectsCloudflare Access (Zero Trust)Google BigQueryCloud FunctionsCloud StorageGmail and Drive APIs

Development and automation

JavaScriptSQL (BigQuery)PowerShellPythonGoogle Apps ScriptREST APIsGit and GitHub

Business applications

Odoo ERPRingCentral phone systemNoahFace time and attendanceWordPress

Projects

Teams in stores, the warehouse and the office worked from spreadsheets, shared inboxes, phone calls and Apps Script tools. I replaced them one process at a time with 12 internal web apps that I design, build and run. Since they rolled out, efficiency and productivity have improved by about 80%.

Each demo runs in your browser on made-up data.

  1. Find the manual work

    Recurring support tickets show where the time goes. I document the fault and the manual process behind it.

  2. Build the app

    Early tools began in Google Apps Script. Now they run on Cloudflare Workers with BigQuery, deployed from GitHub with single sign-on.

  3. Test and support it

    I test on real hardware, write the guides and notices, support the rollout, then keep fixing and improving.

Contact

I'm open to IT support, systems and internal tools roles in Sydney.