About Us

Reliable. Consistent. Purposeful.

Sitts & Hill is a multidiscipline design firm specializing in all aspects of civil and structural engineering, industrial architectural design, and land surveying services. The work of our firm is diverse ranging from light commercial to heavy industrial projects in sectors such as aerospace, oil and gas, rail, marine/waterfront, commercial, multifamily, land development, education, as well as specialty engineering and inspection for towers, cranes, and tanks.

We pride ourselves in our firm’s ability to serve as both the prime consultant on large or small projects as well as our ability to serve as a subconsultant to other architects and engineers.

Sitts & Hill Engineering Square

75 Years of Service Rooted in Trust and Integrity.


Providing consistent relief from costly staff transitions by building lasting relationships with both employees & clients, which keeps the average tenure of employment over a decade and allows us to retain valuable knowledge of client requirements and standards.


Our philosophy at Sitts & Hill is to provide a business platform for design professionals to excel in project delivery. It is with this in mind that all of the owners at Sitts & Hill are "Working Principals". By this we mean that every project has a Principal working alongside our Project Managers and Design Engineers. Our current Principals actively involved in projects are as follows:

Brent Leslie, PE, SE

Vice President

40+ years of experience in structural design, industrial engineering, manufacturing, aerospace, cranes, towers, heavy marine and railroad

Larry Lindell, PE, SE, LEED AP


35+ years of experience in structural engineering, light industrial, multistory buildings, waterfront and architectural design

Kathy Hargrave, PE, LEED AP

Civil Principal

35+ years of experience in civil engineering, commercial design, site development, educational facilities, utilities, grading, permitting and environmental review

Michael McEvilly, PLS

Survey Principal

25+ years of experience in land surveying, ALTA’s, topographic mapping, boundary surveys, short plats, legal descriptions, construction staking, and utility research

Andrew Boileau, PE, SE

Structural Principal

20+ years of varied experience in structural design and analysis for multi-story offices, structures, warehouse facilities and multi-family complexes.

David Boileau, AIA, LEED AP

Principal Architect

25+ years of extensive and varied experience in architectural design, project management and construction administration.

Don Davis, PE

Civil Principal

18 years of civil site design experience in industrial, rail, airfield/flightline, and stormwater management.