About the Firm
An Arizona electrical consultancy built on precision and accountability.
Founded to serve clients who value engineering rigor over volume, O'Farrell Engineering provides principal-led electrical design and consulting across the Southwest.
Our Practice
A focused practice — not a factory.
O'Farrell Engineering LLC was established with a simple premise: commercial and industrial clients deserve an engineering partner who is genuinely engaged with their project — from the first site walk through final closeout.
Our practice is intentionally kept lean so that every project receives principal-level attention. We take on the work we're best suited for, and we deliver documents you can build from without guesswork.
Whether we're producing a power system design for a new manufacturing line, running an arc flash study on an aging switchgear lineup, or supporting a contractor through construction, our standard is the same: clear engineering, delivered when we said it would be.
What We Stand For
Values that show up in the drawings.
Technical Rigor
Every deliverable is grounded in current code, sound analysis, and constructibility review.
Principal-Led
You work directly with the engineer of record — not passed off to junior staff.
Schedule Discipline
Predictable turnarounds so your project stays on the critical path.
Arizona Rooted
Deep familiarity with APS, SRP, TEP, and AZ AHJ requirements.
Interested in working together?
Reach out and we'll be back within one business day.