Jim Ulmer
Jim Ulmer Chief Estimator Jim brings over three decades of experience in pre-construction and estimating to the table, making him a seasoned veteran in the construction industry. He received his BS in Construction from Northeast Louisiana University in 1988. Since then, Jim has lent his expertise to a wide variety of projects such as office, […]
Kristin Wuest
Kristin Wuest Project Engineer Kristin is a seasoned Project Engineer with over five years of experience in the construction industry, spanning resorts, retail, restaurants, entertainment, and fitness sectors. With a Bachelor’s in Business Administration from Texas State University, her career began at Disneyworld, moving to ESPN in sports event management, and evolved into resort and […]
Shannon Chapa
Shannon Chapa Office Assistant Our Office Assistant, Shannon Chapa is a rare native Austinite with over seven years in the construction industry. Her previous roles as Project Coordinator for a commercial general contractor and Sales Representative for residential finishes have given her industry insight as well as the tools needed to deliver exemplary results on […]
Mark Twaddle
Mark Twaddle Project Manager A Texas native, Mark was born and raised in Houston, Tx. His journey to the Austin area began in San Marcus where he received his Bachelor of Business Management from Texas State University. Mark serves as Project Manager for Flintrock Commercial and is an integral part of our success. Through his […]
Heath Fellers
Heath Fellers Project Manager Originally from El Dorado, Kansas, Heath attended The University of Kansas, where he earned a Bachelor of General Studies (BGS) degree. His academic journey was diverse, with a strong focus on Mathematics and a minor in Japanese. With a lifelong passion for construction, Heath is a polished example of what a […]
Nick Scott
Nick Scott Project Manager Nicholas Scott is one of Flintrock’s star project managers with over 8 years of experience in construction. He is an East Coast native who attended boarding school in Connecticut. From there, he attended St. Johns College in Philadelphia where he attained a BA in philosophy. In 2022, he moved to Austin […]
Sarah Wheeler
SARAH WHEELER Accounting Sarah is our company accountant and all-around “mathmagician” who doubles as our adorable ray of sunshine. She was born in Northern California and raised in Austin, Tx. Sarah came to Flintrock as our Office Manager in 2020. Since then, she has gained extensive experience in project accounting and project engineering. She is […]
Candice Edwards
Candice Edwards Controller
Hershel Sandifer
Hershel Sandifer Principle & Senior Project Manager Hershel has been in the Austin commercial construction industry since 1994. There are not many buildings he or his team members haven’t touched. Project Manager / Estimator, Scheduler, and Field Operations Manager with a track record of completing high-end finish / interior projects for high-profile clientele. Takes great […]
Tim Edwards
Tim Edwards Vice President & Project Executive A native Austinite born at Bergstrom Air Force base, Tim has lived in the Austin area for most of his life. He has a BS in mathematics with a minor in physics. From day one, he has been committed to pouring every ounce of his expertise into each […]
