Located in the Westport area near I-270 and Page Avenue

David A. Colvin, P.E., President

Mr. Colvin was appointed President in April 1995 and is currently responsible for overall company operations.
From 1989 to 1995 Mr. Colvin held the position of Vice President of Operations.
From 1980 to 1989, Mr. Colvin acted as Residential Section Supervisor.

PROFESSIONAL MEMBERSHIPS:
American Society of Civil Engineers
National Society of Professional Engineers
Missouri Society of Professional Engineers

ACTIVE REGISTRATIONS:
Registered Professional Engineer: Missouri and Illinois

David J. Bohler, C.E.T., Vice President

Mr. Bohler has been with Clayton Engineering since 1963, and currently serves as manager of the Commercial Department.

PROFESSIONAL MEMBERSHIPS:
American Society of Certified Engineering Technicians (ASCET)
St. Louis Chapter American Society of Certified Engineer Technician (Past President, Vice President, Secretary, Treasurer, Chapter Director)
St. Louis Chapter Missouri Association of Registered Land Surveyors (Past Secretary and Treasurer)
Traffic Engineers Association of Metro St. Louis
Commercial, Industrial, Institutional Council (CIIC) (Division of Home Builders Association)
Florissant Valley Community College--“Civil Engineering Technology Advisory Committee”, Instructor: “The Techniques of Survey Drafting”

ACTIVE REGISTRATIONS:
American Society of Certified Engineering Technicians
Certified Engineering Technician

Greg M. Staley, P.E., Secretary

Mr. Staley was elected to the Board of Directors in 2000.
In 2003, he was named the Corporate Secretary and an ESOP Trustee.
The majority of his day-to-day duties involve acting as a project manager for the company.

PROFESSIONAL MEMBERSHIPS:
Engineers' Club of St. Louis
National Society of Professional Engineers
Missouri Society of Professional Engineers
American Society of Civil Engineers

ACTIVE REGISTRATIONS:
Registered Professional Engineer: Missouri and Illinois

Steven W. Quigley, Vice President of Operations

Mr. Quigley was elected to the Board of Directors in 2003 and as Vice President of Operations in 2005.
As Senior Project Manager, Mr. Quigley is responsible for design and administrative management of commercial and industrial development projects.

Kevin DeSain P.L.S., Vice President of Surveying

Mr. DeSain was recently elected to the Board of DIrectors in March of 2010 and is responsible for all facets of the Land Survey Division of Clayton Engineering.
Technical review and approval of projects, business development and contracts.

PROFESSIONAL MEMBERSHIPS:
Missouri Society of Professional Surveyors
Illinois Society of Professional Land Surveyors
Texas Society of Professional Land Surveyors

ACTIVE REGISTRATIONS:
Professional Land Surveyor: Missouri, Illinois and Texas