Call for a free consultation: 314.594.7011

Gundaker Construction and Restoration Group

The Gundaker Team

Patrick Devers- Co-Owner

Office: 314-594-7011


Patrick Devers is the Co-Founder and Partner of Gundaker Construction and Restoration Group. Patrick is a native St. Louisan and was raised in Chesterfield, Missouri. Patrick attended Christian Brothers College High School (CBC) and graduated in 2007. After graduation from CBC, Patrick stayed in St. Louis and attended college at Fontbonne University in St. Louis, MO and graduated in 2011 with a Bachelor of Science in Sports Management and Business Administration while playing for the baseball team.

After graduating from college Patrick got into the roofing and storm restoration industry as a Project Manager/Independent Contractor for a roofing company in St. Louis, MO.  Patrick eventually teamed up with another Project Manager who worked for the same company, Mike Kossman, and they created a dynamic sales force.  After great success, they decided to start their own company based on the principles of Patrick’s grandfather, Gordon Gundaker.

In his free time, Patrick enjoys spending time with his family, his wife Jennifer, and two children; Leighton and William, playing men’s league ice hockey, attending St. Louis Cardinals and Blues games, and boating at the Lake of the Ozarks.

Most of all, Patrick is committed to providing excellent customer service to Gundaker Construction and Restoration Group clients, and helping his sales people achieve their personal goals.

Mike Kossman- Co-Owner

Direct: 314-606-0942

Office: 314-594-7011


A proud St. Louis native, Mike Kossman has been involved in the construction industry almost half of his life.  After graduating from Francis Howell High School in St. Charles, MO in 2003, Mike began his construction career. Mike worked for various companies specializing in various aspects of the construction industry until he found his niche. In 2012 Mike was introduced to the roofing and construction sales aspect after a 10 year career in the field.

Mike's favorite thing about being an owner of Gundaker Construction and Restoration Group is being able to combine the things he enjoys most; roofing, construction and helping others. Mike has found a well-balanced career that has allowed him to use his knowledge to assist people in their time of need.  

Mike Kossman and Patrick Devers met in 2012 and instantly became the number one sales team at their company. The two developed a bond and a friendship that became the core of Gundaker Construction and Restoration Group and continues to this day.  
Mike enjoys spending his free time with Samantha and their 3 kids; Lilly, Parker, and Lainey.

To reach Mike, call 314-606-0942

Tim Littrell- Estimator

Direct: 636-544-8133

Office: 314-594-7011


Tim Littrell is the Director of Interior Remodeling & New Construction and Sr. Estimator at Gundaker Construction and Restoration Group. Tim joined Gundaker Construction in February 2017 and brings with him 28 years experience in commercial and residential remodeling, renovation, and new construction.

Throughout his 28 years in the industry, Tim has been a trim carpenter, framing carpenter, licensed electrician, master plumber, tile setter, and painter & taper. 

Before coming to Gundaker, Tim owned his own company for several years as well as ran production for other construction companies in St. Louis and St. Charles County focusing on kitchen & bath remodels, additions, interior remodeling and renovation, as well as commercial and residential new construction. 

To reach Tim, call 636-544-8133 

Steve Gomer- Sr. Project Manager

Direct: 314-422-4729

Office: 314-594-7011


Debra McPherson- Director of Client Relations

Direct: 314-532-3013

Office: 314-594-7011




"Long-time family work ethics, they actually show up on time and get the job done as estimated. Their materials are warranted, they are licensed and bonded. Gundaker is a known name in our area. Plus, if you work with a known, reliable contractor, you will not have to work with storm chasers. Your ins carrier is prone to awarding the cheapest bid. Realize, we all know cheapest is primarily the most inferior materials and workmanship. I have a long history with this family, they give you the quality you deserve." Read More

– Cheryl Siemer - St. Louis, MO

"It was a great experience working with Gundaker. From the customer service I received from the sales team, to the timely manner of the crew, I was all around impressed. The roof looks great and they still check up on me and help me with maintenance around the house. I would highly recommend them." Read More

– Phyllis S., Chesterfield, MO

"Thank you for your professionalism while handling our roof replacement. It was an easy process with you coordinating the details with our insurance company." Read More

– Ken & Chrissy Pruitt - Fenton, MO

"I put off replacing my roof for some time. I expected it to be a hassle. Working with Gundaker Construction was so easy! Gundaker handled all the details for me. The work crew did a great job and left no mess. Very smooth!" Read More

– Judy Horrell - Valley Park, MO

GAF Certified Professional Installers

We are uniquely trained and certified to install GAF materials, representing only 3% of all roofing contractors licensed in the State of Missouri. With our certification, all homeowners and businesses receive an extended warranty that guarantees a 50 year non-prorated coverage for new roofs made using GAF materials.

Learn More