Meet The Team

Meet The Team

Mark Gunder


Mark Gunder took over operations of Gunder Associates in 2009. He has 22 years in the HVAC industry. His passion is growing the business and working with our manufacturers to build great partnerships. Mark is a die-hard Red Raider who enjoys the outdoors and lake life. He is fiercely proud of his two daughters.

Robert gunder

vp of sales & Marketing

Robert Gunder is the Vice President of Sales and Marketing. He has been with Gunder Associates since 2007 and spent most of that time covering the South Texas territory.  He has previously worked on the distribution and contracting sides of the business. His hobbies include golfing, traveling, and spending time with his wife and daughters.

Sales Managers

Matt Jones

Sales Manager

Matt Jones splits the DFW market with Raquel Webster. Matt has been involved in the HVAC industry for over 13 years and now over seven with Gunder Associates. Matt enjoys playing golf and traveling with his wife Amy and daughter Olivia.

Territories: DFW

Raquel Webster

Sales Manager

Raquel Webster splits the Dallas territory by customer with Matt Jones. She also covers Tyler, Longview and Shreveport. She is a Texas Tech graduate and has an MBA from Texas Woman’s University. She has over 10 years of industry experience; the majority has been working on plan and spec construction projects. Raquel has been with Gunder since 2019. She loves to exercise, cook and spend time with her family.

Territories: DFW

Andrew Liska

Sales Manager

Andrew Liska splits the South Texas territory with Robert Gunder. Andrew is a graduate of Texas State University and has been with Gunder for one year. He previously worked in the construction industry selling heavy equipment and machinery. Andrew enjoys sports and outdoors, traveling with his wife Kelsey, and spending time with his family.

Territories: Austin, SATX, & South Texas

Matt Hoover

Sales Manager

Matt Hoover splits the Houston market with Marty Rusnak. Matt has been involved in the HVAC industry for over 20 years, including time with two different manufacturers and now over nine with Gunder Associates. Matt enjoys playing golf, traveling with his wife Summer and spending time with family and friends.

Territories: Houston Metro

Marty Rusnak

Sales Manager

Marty Rusnak splits the Houston territory by customer with Matt Hoover.  Marty graduated from the U.S. Naval Academy with a BS in mechanical engineering and was a submarine officer on active duty in the navy.  He just recently retired from the Navy Reserve with over 29 yrs. of combined active duty and reserve service.  He has an MS in Business Management.  Marty has been in the HVAC industry since 2005, with regional and national sales experience at various manufacturers, and he has been a member of the Gunder team since 2016.  Marty loves to travel, enjoys golfing, and is an avid sports fan. 

Territories: Houston Metro

Freddy Martinez

Sales Manager

Freddy Martinez covers West Texas, El Paso, New Mexico and a sliver of Colorado. Freddy has been involved in the HVAC industry for over 20 years. He is a proud alum of Texas Tech University and supports all Texas Tech sporting events. He is blessed to be married to Heather, his high school sweetheart, for over 25 years, and is a proud father to his twins, daughter Bailey and son Bryce. Freddy enjoys traveling with his wife, and both have a bucket list of visiting every major league baseball park.

Territories: W. TX, El Paso, & New Mexico

Bryan Moates

Sales Manager

Bryan Moates is the State of Oklahoma Territory Manager for Gunder Associates and has serviced this territory for more than 20 years. Bryan loves the outdoors and is an avid fisherman.

Territories: OK

Chris Gazaway

Sales Manager

Chris Gazaway covers Arkansas, Texarkana, (Texas), Western Tennessee and Mississippi. Chris has an MBA and B.S., plus 19 years’ industry experience as a contractor, wholesaler and factory sales representative, and five years with Gunder Associates. He greatly enjoys hiking with his wife and kids and spoiling his granddaughter.

Territories: AR

Willie Mayes

Sales Manager

Willie Mayes covers the state of Louisiana, parts of East Texas and the Mississippi Gulf Coast. Willie is a graduate of Stephen F. Austin State University where he received his BBA in Economics.  Willie has worked on the contractor, wholesaler and manufacturer’s representative sides of the HVAC industry for over 20 years. He loves to spend time with his wife Betsy, daughter Maggie and son Harper. Hunting, fishing and kids sports are where you’ll find him on the weekends.  He has been with Gunder Associates since 2012.  

Territories: LA

Cody Shadden

Sales Manager

Territories: CO & Mountain States

Sales Support – Applied

David Clifton

Sales Support- Applied

David Clifton works in the Carrollton office and primarily supports the sales team with Gunder’s applied and engineered products. He is a mechanical engineer who has been working in the HVAC industry since 2015. David joined the Gunder team in 2017. David enjoys travelling, hunting, and fishing.

Kolin Hess

Sales Support- Applied

Office Staff

Karen Gast

Tracie Ponthieux

Helen McDonough

Alex Barbosa

Bill Petrollese

Jesse Miranda