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 […]
Marissa Jenkins
Marissa Jenkins Project Engineer Marissa is a Project Engineer with experience in various aspects of project management, quality control, safety, accounting, business unit leadership, supervision, and estimating. Throughout her career, Marissa has worked on different types of projects such as office, industrial, flex, healthcare, retail, interiors, banking, restaurant and entertainment. She has spent 2 years […]
Angela Haaser
Angela Haaser Superintendent Angela was born in Ohio and raised in Pittsburg, Pa. She has called Austin home for 24 years and absolutely loves it. With over 15 years of quality-focused commercial construction experience, Angela brings a unique focus to the firm. Her expertise is in healthcare, retail and hospitality as she has overseen medical, […]
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 […]
Keith Mills
Keith Mills Estimator and Project Manager Keith Mills is a veteran in commercial construction, building his impressive resume since 1984, and serves as our project manager and estimator. He is originally from Houston, Tx. where he majored in architecture and minored in building construction. He attended San Jacinto Jr College, Texas A & M- Houston, […]
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 […]