Sales Management Team

David Luman is the Senior Area Manager for Columbia Pipe and Supply. He has worked in Distribution for well over 25 plus years.  David is responsible for the overall profitability of Columbia Pipe and Supply. He currently lives in Aurora, IL with his 3 children and wife Rose.

Shawn Ramos is the Columbia Pipe & Supply Commercial Sales Manager. Shawn is a results-driven sales professional with over 20 years experience. Shawn started his career at Columbia Pipe in 2000 and has held a variety of positions, including Warehouse Associate, Will-Call Manager, Inside Sales Representative and Outside Sales Representative. 

Shawn is a husband and father of three. He enjoys spending his time coaching his three children in Softball and T-ball. He also enjoys practicing the art of jiu-jitsu.

Paul is an industry veteran with over 33 years of experience working throughout Chicagoland, always in a purchasing role. He joined the Columbia Pipe family in 2011, coming on board as Purchasing Mgr. In his current role of Corporate Product Mgr. Paul oversees vendor relations, working closely alongside our purchasing department. Paul is most proud of his life outside of CPS with his wife and two grown children. 

Maggie Welches is the Columbia Pipe & Supply Regional Sales Manager for Chicago Metro and Northern Indiana Contractors. Maggie takes pride in collaborating with contractors to provide nothing but Service Plus Solutions. With  achieving over 27 years at Columbia Maggie has found herself with experience in inside, outside and management.

Maggie resides in Munster, Indiana with her husband Jeremy and son Colton. As a family they enjoy fishing, watching the Cubs and riding around in their hotrod.

Jeff Kamholz is the Director of Sales for Columbia Pipe. Jeff has been with Columbia Pipe since 2000. Prior to Columbia Pipe, he worked for Weil-McLain as a Sales Territory Manager and has been in the Boiler Business since 1989.

Jeff lives with his wife in Tinley Park, IL, has two sons, and enjoys golfing in his spare time.

Gene Stevens is the Columbia Pipe Regional Manager who coordinates service to contractors in southern Wisconsin and northeastern Illinois. He entered the industry in 1978 and has seen the business from a variety of viewpoints, including truck driver, warehouse manager, operations manager, outside sales, purchasing, sales manager, and regional manager. Gene joined Columbia Pipe in 1998.

Living in the Milwaukee area, Gene enjoys bird hunting, running his dogs, and motorcycle riding. He has been married for 28 years and has one son.

Mike Parker manages our contractor relationships in Northwest Illinois, which includes the Rockford location. He entered the industry in 1977 with Mott Bros. Company and joined Columbia Pipe in 1996 when Mott Bros. Company was acquired by Columbia Pipe. His personal area of expertise is commercial plumbing and he manages an extremely experienced and diverse inside/outside sales team.

Mike has lived in the Rockford area most of his life and lives an active lifestyle of working out and running with his Labrador, Parker. He also enjoys golf, sport fishing, and is an avid Packers & Cubs fan!

Scott Jensky is the Columbia Pipe Regional Manager for our locations in Appleton, WI and Wausau, WI as well as Menominee, MI. Scott has an Associate’s Degree in Instrumentation & Controls. He began his career as a driver for Bertsch Company in 1986, where he worked his way into outside sales. He joined Columbia Pipe in 2003 and helped bring the company into Northern Wisconsin and the Upper Peninsula of Michigan.

Scott has three daughters and two sons. He lives in Green Bay with his wife Stacey. An avid Green Bay Packer fan, Scott enjoys collecting and displaying Packer memorabilia.

Today he lives outside of Peoria and enjoys playing golf, being outdoors, grilling and watching sports. More

Bill Zuidema is the Columbia Pipe & Supply Regional Manager for Michigan’s Lower Peninsula. A 25-year industry veteran, he has managed three different regions within the state of Michigan with over 15 years with Columbia Pipe. A hands-on guy, Bill assists customers from every angle. He helps assess orders up front, hosts training sessions, and goes onsite to troubleshoot difficult applications.

Bill enjoys spending time with family and friends and spends his free time traveling and attending sporting events throughout the year.

Mike is the Industrial Sales Manager for northern Illinois and southern Wisconsin. He graduated from Illinois State University in 1996 with a Bachelor of Science in Speech Communication and started with Mott Bros. Company that same year. One month after Mike started his job, Columbia Pipe acquired Mott Bros. Company and Mike began his career with Columbia Pipe.

Mike lives in Roscoe, IL with his wife, Jessica, and two daughters, Lauren and Holly. He enjoys fishing, golfing, watching all kinds of sporting events, and spending time with family and friends.