Sibley Nature Center Staff
Introducing the dedicated and skilled team behind the Sibley Nature Center. Every member of our staff carries an unwavering commitment towards preserving the splendor and ecological diversity that our center represents.
With a deep-rooted passion for the environment, they tirelessly work towards promoting the understanding and love for nature, fostering a sense of wonder that our magnificent center evokes.
Paul Acosta
Executive Director
Paul is a fifth-generation Texan who joined Sibley Nature Center as Executive Director in August 2018. Prior to joining Sibley, Paul was a senior consultant for a nonprofit consulting firm based in Midland. He earned his bachelor’s and master’s degree in History and has a certificate in Nonprofit Management. His professional experience includes public education and nonprofit management. Paul currently sits on the board of directors for Holy Trinity Preschool. However, his most important role is being Dad to his 7 year-old daughter, Kai, and husband to Valerie.
Michael Nickell
Museum Scientist
Michael W. Nickell is the Museum Scientist and Naturalist for the Sibley Nature Center. He has a BS in Biological Sciences from Sul Ross State University and both MS and MA in Zoology and Museum Science from Texas Tech University. Michael has also been a professional artist for over 30 years and a retired martial arts instructor. He enjoys nature journaling, photography, and wildlife rehabilitation.
Misty Thomason
Education Director
Misty is a certified teacher in Science and Theatre with a graduation background from Tarleton State University since 1998. After moving back home to West Texas in 2013, she joined MISD as an active community theatre member. In the community theatre, Misty met and married Joe Thomason. Together, they share hobbies which include hiking, theatre, and family time with their kids and grandson.
Denise Moore
Director of Garden and Landscape Stewardship
Denise earned her Bachelor of Science in Landscape Architecture with a Minor in Environmental Resources from Arizona State University. She completed the Desert Landscaper School certification program and trained as a Botanical Artist at the Phoenix Desert Botanical Garden. Denise worked for the City of Phoenix as a Landscape Architect in the Development Services Department. She is an ISA (International Society of Arboriculture) certified arborist and has worked as the Urban Forester for the cities of Allen and Plano, TX. She loves plants and nature in general and is in her “happy place” when she is covered in dirt or doing something creative or artistic.
Kelly Hedstrom
Maintenance Technician
Kelly retired after a 40 year career in electronic systems technology and wanted a part-time job outdoors. While at Sibley Nature Center, they met someone who was leaving their job as a maintenance tech and offered the position to Kelly, who accepted. Kelly is grateful for the opportunity and thankful for the positive impact it has had on their life.