Thanks for stopping by! We’re pleased to announce that Rentenbach Constructors Incorporated is now officially known as The Christman Company. Christman acquired Rentenbach in a merger of the two privately-held firms in December 2013 and the company’s Knoxville, TN and Greensboro, NC offices continued operating under the Rentenbach name for several years but are now moving forward under the Christman brand.

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John A. Holmstrom, P.E., LEED AP

    John A. Holmstrom, P.E., LEED AP
    Senior Vice President, Industrial and Power
    Michigan State University, B.S., Civil Engineering

    John leads the Industrial and Power Group and is also responsible for oversight of major special projects and strategic initiatives of Christman. He joined Christman in 1987, holding a variety of positions of increasing responsibility including project engineer, superintendent, project manager, and estimator. He became a full-time estimator in 1993 and was promoted to chief estimator in 1995 and vice president in 1999. He was appointed to Christman's board of directors in 2005. John was promoted to the position of senior vice president in 2008, is a member of Christman's board of directors, and was appointed to Christman's executive committee in 2016.