Learn about our Team and Culture

We are a team of dedicated professionals, ready to do what ever it takes to make your business grow.

Tim Combs

Tim Combs

President and General Manager

Tim is the President of MDTI and has 25 years of experience in the Civil Engineering and Geostructural Industry. Tim has developed extensive industry knowledge by working to support the needs of specialty contractors at each and every business level. Tim’s diverse industry background has given him exposure to a wide variety civil construction projects, ranging from the simplest residential applications to the most complex commercial and industrial projects. Coupled with a highly skilled and educated team, Tim focuses on providing the highest quality products and solutions to MDTI’s customers in order to consistently exceed expectations.

Nathan Mathews

Nathan Mathews

P.E.

Nathan has a Bachelor of Science in Civil Engineering from Southern Illinois University Carbondale, and is a licensed professional engineer. Nathan has engineer and design experience in foundations, reinforced concrete, site drainage, and grading.

Brian Smith

Brian Smith

Operations Manager

Brian was born in New York. After being honorably discharged from the USAF, he relocated to the Midwest in 1996. He has been with MDTI in purchasing and operations division.

Marc Mastrantuono

Marc Mastrantuono

P.E.

Marc has a Bachelor of Science in Civil Engineering & Architectural Engineering from the Missouri University of Science and Technology. Marc’s primary responsibilities are with sales, design, and customer support with all of the products MDTI has to offer.

Angie Sheridan

Angie Sheridan

Administrative Assistant

Angie was born and raised in the Midwest. After living in Orlando, FL for a brief time and working for Universal Studios. She moved home and started working in the construction industry as an administrative assistant. With her keen eye for detail and her responsiveness to questions, she will be able to assist you efficiently and effectively with all your MDTI needs.

Terry Gaines

Terry Gaines

Hydraway Production Manager
Jim Surrell

Jim Surrell

Hydraway Sales Manager

Jim joined Midwest Diversified Technology over 6 years ago. Jim’s primary responsibility is Sales Manager for the Hydraway 2000 product line. Prior to joining MDTI, Jim worked with national company in the drainage industry for 6 over years. Jim’s focus for Hydraway is in the sports field, golf course, industrial and highway markets. Jim works with Engineers, Architects and Contractors nationwide.

Welcome! This is our dedicated Team at MDTI. Did we say that we would love to work with you? So don’t be shy, get in touch!

The Office

MDTI stocks a full yard of product readily available for shipment to ensure your project meets deadlines.

Midwest Diversified Technologies is located in the greater St. Louis area with a satellite office in Colorado Springs. Our warehouse is fully equipped to handle your order for geostructural construction products in a timely manner.