Gary Virk · IT Specialist

Endpoint support and network troubleshooting.

I’m an IT specialist based in Mississauga, Ontario. My work has covered Windows endpoints, Dell hardware, software support, imaging and deployment, and endpoint connectivity. The case studies below show how I narrow down faults, document the work, and retest the fix.

View case studies View résumé

Location: Mississauga, Ontario
Background: Field service and end-user support
Focus: Windows endpoints and networks

Selected work

How I troubleshoot and verify a fix.

Each case shows the fault, the check that narrowed it down, the correction, and a separate retest. Private details are removed from the published lab output.

Selected lab output

Test-NetConnection 192.0.2.10 -Port 8443
TcpTestSucceeded : True

Resolve-DnsName service.example.test
[no answer]

Assessment : Fail / DNSOnly

Controlled Windows 11 ARM64 run

Windows endpoint connectivity triage

A PowerShell diagnostic that distinguishes a DNS failure from a wider connectivity problem, then records the result for handoff.

Direct TCP still works while name resolution fails, narrowing the fault to DNS.Read the case

Lab topology

Batfish model and Packet Tracer checks

Validating a network access rule change

This lab tests one ACL change against required and blocked traffic, corrects a deliberate regression, and repeats the baseline checks.

Removing the inserted deny restores user HTTPS while guest-to-admin traffic remains blocked.Read the case

Supporting labs

10Endpoint application deployment and rollback 03DHCP failure isolation 07SMB authentication and share permissions 04Four packet captures, four network faults AllView all work

Experience

On-site IT support.

My on-site work has included Windows endpoints, Dell hardware, software, deployments, ServiceNow records, and device-level connectivity problems.

Field Service / End-User Support Technician

Experis / Manpower Services Canada Ltd. · Dell Canada assignment at Cummins

May 2023 to December 2025
Mississauga, Ontario

Provided on-site end-user support for Windows endpoints, Dell hardware, software, device-level connectivity, imaging, deployment, and ServiceNow ticket records.

Education

Computer Systems Technician - NetworkingSt. Clair College · Windsor, Ontario

Skills

Tools and systems.

This list combines hands-on support work, formal training, and skills demonstrated in the labs on this site.

Endpoint and user support

Windows imaging and deployment, Dell hardware diagnosis, software support, peripherals, device-level connectivity, and escalation.

Ticketing and documentation

ServiceNow tickets, incident notes, diagnostic steps, handoffs, and support documentation.

Networks and connectivity

TCP/IP, DHCP, DNS, VLAN concepts, routing and switching, Wi-Fi, access-control fundamentals, and packet analysis.

Support scripting

PowerShell and Python tools for focused data collection, repeatable checks, and clear support output.

Contact

Have an IT support or networking role in mind?

I’m based in Mississauga, Ontario. Use the form below or email me directly about IT support and networking roles.

Email me directlyi@garyvirk.com

Gary Virk · Mississauga, Ontario, Canada