Welcome to Jeff Parrish PC Services
Technology is the backbone of modern life, whether at home or in the office. Founded by a seasoned IT professional with two decades of experience, we're dedicated to providing top-tier, reliable, and personalized technology solutions across Northern Illinois and Southern Wisconsin, and specialized CARF compliance consulting nationwide.
We handle everything from frustrating home computer issues to complex business network management and critical CARF accreditation IT requirements, ensuring your systems are secure, efficient, and always working for you.
The latest in IT
We leverage information technology to help businesses revolutionize their operations — proactive, strategic, and grounded in two decades of hands-on experience with the tools people and organizations actually rely on: Ubiquiti UniFi networking, Microsoft 365, and the day-to-day realities of running a small business or a CARF-accredited service organization.
Meet the owner
Jeff Parrish has been running Jeff Parrish PC Services since 2003, building networks and solving IT problems for local businesses around Zion, IL. Alongside the business, his background spans both hands-on enterprise infrastructure and the day-to-day realities of running technology for a service organization:
- Sr. Data Center Engineer, The Judge Group — rack & stack for a Microsoft AI datacenter build-out.
- Director of Technology, Safety & Security, Bayside Terrace, LLC (2017–2025) — network overhaul to Cat5e and UniFi with segmented VLANs, VoIP implementation, Microsoft 365 E5 rollout, and authored the organization's safety policies.
- FCC-licensed radio operator since 1990, and Executive President (volunteer) of Radio Services Diversified Communication Association, a non-profit emergency communications group — managing two-way radios and a traveling repeater system for live events.
- Volunteer network & A/V lead, Great Lakes Church (Kenosha, WI) — maintains the church network and runs technology (audio and video) for the GLC Kids department.
That mix — enterprise datacenter work, safety-and-compliance-driven IT leadership, and hands-on radio/network/AV work — is what shapes how we approach both business IT and CARF technology consulting: proactively, and with real accountability for uptime and safety, not just theory.
Real network infrastructure, not just theory
We operate our own IP address space and Autonomous System — AS401575, with 204.52.221.0/24 (IPv4) and 2602:f40d::/40 (IPv6) registered directly to Jeff Parrish PC Services via ARIN. Running actual BGP-announced address space, in both protocols, is the kind of enterprise/ISP-grade networking experience most IT consultants only read about — it's part of how we think about network design, routing, and reliability for the businesses we support.