The MCAI staff is committed to meeting the needs of all members and we consider ourselves an extension of your management team. In addition to the MCAI staff, members also have access to the expertise of several industry experts through their affiliation with the Mechanical Contractors Association of America.

MCAI Staff

  • Scot Stoltenberg

    Scot Stoltenberg

    Executive Director

    Scot Stoltenberg joined the MCAI in January 2000 as Director of Safety & Training, and became the Executive Director in September 2014.  He previously worked for the Agribusiness Association of Iowa as a Regulatory Technical Specialist.  Scot received his B.S. degree in Industrial Technology – Occupational Safety from Iowa State University in 1998.  From 2000 to 2014, Scot managed and conducted all safety training and consultation offered by the MCAI.  He served on the MCAA Health & Safety Committee from 2007-2018.  Scot serves as a management trustee on the UA Local 33 Health & Welfare and Pension Funds and UA Local 33 JATC, along with the UA Local 125 JATC and UA Local 125 Health & Welfare and Pension Funds.  In his time with the MCAI, Scot has led the development of two industry-leading services – SDS BinderWorks, a web-based Safety Data Sheet management service, and Training Vault, a web-based training, licensing and certification tracking system that is actively used by UA Local 33 and UA Local 125, along with the Iowa Chapters of SMACNA and NECA, and the Master Builders of Iowa.

  • Meghan Winger

    Meghan Winger

    Associate Director

    Meghan Winger joined the MCAI in September 2014 as Member Services Assistant. In January 2017 she was promoted to Director of Online Services.  In January 2023, she was promoted to Associate Director.  She previously worked as a data coordinator within the Cost Management and Supply Base Management department for the John Deere Engine Works in Waterloo, IA. Meghan graduated with a Bachelor’s degree from the University of Northern Iowa in 2009. Meghan’s primary responsibilities include overseeing the development, maintenance and day-to-day operations of the MCAI's web-based member services, including SDS BinderWorks, Training Vault, the MCAI website, and the MCAI social media accounts.

  • Jennifer Adkins

    Jennifer Adkins

    Office Manager / Event Coordinator / NCPWB Iowa Chapter Secretary

    Jennifer Adkins joined the MCAI in August 1999. She previously worked as a legal assistant for the Barrick Law Firm. Jennifer graduated with a business degree from Hamilton Business College in 1991. She is responsible for all administrative, accounting and event coordinating duties for the MCAI.  She also serves as the National Certified Pipe Welding Bureau (NCPWB) Iowa Chapter Secretary, assisting NCPWB members with tracking and maintaining welder qualifications and continuity.


  • Justin Hupfer

    Justin Hupfer

    MCAI Lobbyist, PolicyWorks

    As CEO of PolicyWorks, Justin Hupfer is responsible for the firm’s overall business operations and achievement of client objectives, while also serving as one of MCAI's lobbyists during the legislative session.

    ​He previously served as Vice President of Government Affairs for the Iowa Credit Union League (ICUL), overseeing its federal and state government affairs activities and political action fundraising. Under Justin’s direction, ICUL’s political action committee and grassroots program consistently ranked among the most effective in the state. Prior to that, he worked on the Republican caucus staff in the Iowa House, staffing the House Commerce and Economic Development Committees.

    Justin received his law degree with honors from Drake University Law School and graduated from Grinnell College in Iowa. He also served eight years as an officer in the United States Army Reserves, Judge Advocate General’s Corps, earning the rank of Captain. Justin currently serves on the board of the Iowa Taxpayers Association and the Johnston Board of Adjustment.

  • Christopher Rants

    Christopher Rants

    MCAI Lobbyist, PolicyWorks

    As a PolicyWorks partner, Christopher is a full-time lobbyist at the statehouse and provides MCAI with counsel on our government affairs and grassroots initiatives, as well as political action engagement.

    ​Christopher served in the Iowa House of Representatives from 1993 through 2010. He served as the leader of the Republican caucus for a decade, including Speaker of the House of Representatives for four years. He was an advisor to the Romney campaign in 2008 and was a policy consultant to the Governor Branstad campaign in 2010. 

  • Walter Sperko

    NCPWB Technical Consultant

    Walter Sperko is the Technical Consultant to the National Certified Pipe Welding Bureau and a member of the Engineering Committee of the Pipe Fabrication Institute. He provides engineering consulting services to customers in the metal fabrication industries in the technical areas of welding, metallurgy, manufacturing processes, piping and pressure vessel design, inspection and quality assurance. Sperko Engineering also prepares and conducts training programs in piping, welding and metallurgy for ASME, as well as custom-tailored programs related piping and welding. Mr. Sperko holds five patents and serves on various ASME Code committees.

MCAI Membership

Become an MCAI member today and be part of the mechanical contracting industry’s premier association.