Daniel M. DeGraaf, P.E.Daniel M. DeGraaf, P.E.
Executive Director/CEO

Michigan Technological University, BSCE
April 2006 to present - Executive Director/CEO

July 2000 to April 2006 MCPA,
Director of Engineering – West Michigan
Working to promote concrete pavement in local markets.

Foreman, superintendent, estimator, project manager & General manager with the following companies over 23-years:
  • Eisenhour Construction Co. (IHC)
  • Kiewit Western Company
  • Rieth-Riley Construction Company
  • Hunt Paving Company

As a contractor, estimated and constructed concrete pavements in 20+ States.

Based in: Okemos Office
Phone: (517) 347-7720
Email[email protected]

David HollingsworthDavid Hollingsworth
Director of Training & Technical Services

Mr. Hollingsworth is Director of Training/Technical Services for the Michigan Concrete Association. In this position, Mr. Hollingsworth manages and serves as lead instructor for the various American Concrete Institute (ACI) and MCA certification programs offered through the Association. In addition, he provides technical support for the Association's ready-mixed concrete producers.

Mr. Hollingsworth is a graduate of Michigan Technological University with degrees in Civil Engineering (1985) and Engineering Administration (1986).

Prior to joining the Michigan Concrete Association in 1998, he was employed by St. Marys Cement as a Technical Service Engineer (1987-1993) and as Manager of Technical Services – Great Lakes Region (1993-1998).

He is an active participant with ACI either currently serving or previously serving on committees C610 – Field Technician, 211 – Mix Proportioning, 210 – Durability, CPC – Certification Programs Committee, and Convention Committee.

Based in: Okemos Office
Phone: (517) 347-7720
Email[email protected]

Steven M. WaalkesSteven M. Waalkes, P.E.
Director of Engineering – West Michigan

Mr. Waalkes is the Director of Engineering - West Michigan for the MIchigan Concrete Association. In that role, he assists owners, engineers, inspectors, and contractors with the design, specification, and construction of concrete pavements and other concrete-related products. Steve also assists contractors and other members with troubleshooting and technical issues regarding concrete design, construction, and rehabilitation. Steve has also given workshops and presentations around North America on concrete pavement practices, technology, and research.

Prior to his current position, he was with the American Concrete Pavement Association for six years as the Managing Director of Technical Services and the Director of Engineering & Rehabilitation. Mr. Waalkes has also worked for a consulting engineering firm and has taught university-level highway engineering courses. He has a Bachelors of Science degree in Engineering from Calvin College and a Masters of Science degree in Civil Engineering from the University of Texas at Austin. He is a registered Professional Engineer in the State of Illinois, and a member of the American Concrete Institute, the American Society of Civil Engineers, and the National Society of Professional Engineers.

Based in: West Michigan Office
Phone: (616) 633-9629
Email: [email protected]

Heather SmithHeather Smith
Director of Engineering - Private Markets

Ms. Smith joined MCA in May 2013. Her primary role involves promoting the use of concrete in the commercial and industrial markets. She works predominately with MCA producer members and flatwork promotional teams, and also assists with non-traditional paving market opportunities. Heather graduated from Michigan State University with a degree in Civil Engineering and was employed by the Barry County Road Commission in Hastings, Michigan for 10 years, working with 16 township boards and managing various county road and bridge construction projects.

Based in: Okemos Office
Phone: (517) 347-7720
Email: [email protected]

Corrina Ruthig
Accounting/Office Administrator

Ms. Ruthig is the Accounting Administrator for the Michigan Concrete Association. She started working for the MCA in 2004. Prior to joining MCA, she worked for Builders’ Redi-Mix for 20 years as a Financial Supervisor and was responsible for all accounting functions. Her responsibilities at MCA include managing and administering all aspects of the accounting and financial reporting. She also coordinates the creation and maintenance of the annual directory, manages the association's membership, the meeting planning for the annual conference/workshop and overseeing the daily functions of the office.

Based in: Okemos Office    Phone: (517) 347-7720  

Email: [email protected]