
DMc Engineering was founded in 1987 by Derek J. McGregor, PE, PLS, with a clear mission: deliver civil engineering and land surveying services built on honest communication, disciplined coordination, and precise calculation. More than four decades later, those three principles — Communicate, Coordinate, Calculate — remain the foundation of every project we take on.
Our firm has been headquartered in Irvine, California, since its inception, giving us deep knowledge of Orange County's regulatory environment, public agencies, and local development landscape. That local expertise, combined with a reputation built largely on repeat business and referrals, has allowed DMc Engineering to grow steadily for over 40 years without losing the responsiveness and accountability of a local firm.

We are proud to serve public agencies, school districts, private developers, and homeowners associations across Orange County. Our reputation is built on repeat business and referrals.
Featured clients include:

We maintain clear and consistent communication with clients, agencies, and consultants from project kickoff through close-out.

We manage all project elements including permits, utilities, agencies, and contractors to keep work moving efficiently and on schedule.

We deliver precise engineering calculations and accurate survey data that form the essential foundation of all plans, maps, and reports.
With over 40 years of experience serving Orange County's public agencies, private developers, and school districts, our licensed engineers and surveyors are ready to bring precision, expertise, and local knowledge to your next project.
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