California native and world traveler, Sasha has called Oro Valley home since 2011. As an artist, educator, and environmentalist, she has always found solace and sanctuary in the exquisite, complex beauty of nature. Being a part of the TCP team, bringing the Wilsons vision to an ever-growing audience is both an honor and a delight. 

Lesli Pintor | Treasurer

Lesli is a retired financial and nonprofit leader, working 30+ years in banking, including 15+ in commercial real estate construction lending. She taught business communication at UA’s Eller College (overseeing 13 nonprofit student consulting projects) and led Growth Partners Arizona, a nonprofit loan fund. Lesli serves on the UPI Loan Fund’s board and is a committee liaison for the Tucson Festival of Books.

Expertise: Finance
Affiliation: Tohono Chul Governance Committee and Finance Committee

Sergio Cossio

Sergio is a Tucson resident, raised in Douglas, AZ, and a graduate of Cochise Community College and the University of Arizona. He has been in banking for 25 years, most recently serving as the VP of Commercial Finance for First Citizens Bank. He has been married to his wife, Jazlee, for ten years, and in his spare time he enjoys the outdoors, golf, and attending all dance recitals/events for his daughters Valentina (9) and Alessandra (7). He is also an active board member for Big Brothers Big Sisters of Southern Arizona.

Jacquelyne Mingle | Secretary

Jacquelyne is an estate planning attorney at Moeller & Conway, PLLC. Her J.D. is from the University of Arizona and her undergraduate degree is from the University of Kansas. Before law school, she was a journalist at USA Today. She and her spouse Stephen live in Oro Valley in a house evenly divided between dogs and cats. 

Expertise: Estate planning, law
Affiliation: Fleming & Curti, PLC

Gayle Mateer

Gayle is originally from Michigan but has lived in Wisconsin, New Jersey, Florida, and Washington State, where she still spends her summers. Gayle has over 35 years of experience in information technology and was a global head of information systems for several Fortune 500 companies, including Pfizer, Microsoft, and eBay.  She fell in love with our beautiful Sonoran Desert the first time she visited. After realizing that Tohono Chul was her happy place, she became a volunteer and is now a docent and a mentor to new docents in training. Gayle serves on the TCP Finance and Philanthropy committees. She is also the President of Preserve Vistoso, a non-profit organization that was formed to protect a former golf course in Oro Valley from development. The organization raised over $2M to purchase the property, which is now under a conservation easement through the Town of Oro Valley.