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Leadership Team

Duane Highley, Chief Executive Officer

Duane Highley

Chief Executive Officer

Duane joined Tri-State in 2019 and has 39 years of experience with cooperatives. He previously served as President/CEO for Arkansas Electric Cooperative Corp. (AECC) and Arkansas Electric Cooperatives, Inc. (AECI). Duane serves as Co-Chair of the Electric Subsector Coordinating Council (ESCC), coordinating security efforts between electric utilities and the U.S. Government.

Elda de la Pena, Senior Vice President People and Culture/CHRO

Elda de la Peña

Chief Administrative Officer and CHRO

Elda has served in numerous human resources roles since joining Tri-State in 1997. As CAO/CHRO, she oversees a variety of service functions, including: human resources, people and culture, payroll, training, IT, cyber security, fleet, facilities and records. Elda has a master’s degree in Language and Interpersonal Communication, and is an SHRM Senior Certified Professional and an HRCI certified Senior Professional in Human Resources.

Bob Frankmore, Chief of Staff

Bob Frankmore

Chief of Staff

Bob joined Tri-State in 2014, serving first as Vice President, Strategy before becoming Chief of Staff in June 2022. As Chief of Staff, Bob works closely with the CEO and oversees Government Relations and External Affairs, Communications, and Strategy. Previously, he served as Senior Vice President at Hill & Knowlton Strategies. Bob has more than 20 years of experience in the energy industry and more than 25 years of experience in governmental relations, communications and public affairs. He has a Bachelor of Arts degree in political science from Colorado State University.

Chris Pink, Senior Vice President Operations

Chris Pink

Senior Vice President of Operations

Chris joined Tri-State in 2008 and has served in numerous engineering and management roles, including Vice President of Engineering and Construction and Vice President of Transmission Engineering. As SVP of Operations, he oversees Tri-State’s mining, generation, and transmission operations and construction. Before Tri-State, he contributed to advancements in renewable energy integration at the National Renewable Energy Laboratory and served as an electrical engineer in both cooperative and consulting capacities. He began his career in the U.S. Navy as a nuclear plant supervisor and instructor. He holds a master's degree in engineering systems and a bachelor's degree in electrical engineering from the Colorado School of Mines. 

Reg Rudolph, Chief Energy Innovations Officer

Reg Rudolph

Chief Energy Innovations Officer

Reg joined Tri-State in January 2022 and is responsible for developing and implementing competitive energy services, managing beneficial electrification programs and overseeing member relations. Prior to Tri-State, he served as General Manager of San Isabel Electric Association, Inc. for 13 years and has more than 30 years of experience in the electric cooperative utility industry. Reg has a Master of Business Administration degree from Colorado State University and bachelor’s degrees in business administration and economics from North Dakota State University.

Jay Sturhahn

Jay Sturhahn

Senior Vice President and General Counsel

Jay joined Tri-State in October 2022. Prior to Tri-State, he was an equity member of Sherman & Howard, LLC in Denver, where he counseled and represented clients in matters involving corporate governance, internal investigations, contractual disputes, construction law and matters related to FERC and PUC regulation. He has more than 20 years of legal experience, and began his legal career as a clerk on the U.S. Court of Appeals, Sixth Circuit. Jay has a Bachelor of Arts degree in history from Yale University, and a Juris Doctor degree cum laude from the University of Michigan Law School. He is the incoming chair (2023-2025) of the Colorado Legal Aid Foundation.

Todd Telesz, Senior Vice President and Chief Financial Officer

Todd Telesz

Senior Vice President and Chief Financial Officer

Todd joined Tri-State in January 2024. Prior to Tri-State, he served as chief executive officer and general manager of Basin Electric Power Cooperative. He previously served as senior vice president of the Power, Energy and Utilities Division of CoBank, one of the largest private providers of credit to the U.S. rural economy. Todd has a Bachelor of Science degree in economics from The Wharton School of the University of Pennsylvania, with a dual concentration in Finance and Strategic Management.

Lisa Tiffin, Senior Vice President Energy Management

Lisa Tiffin

Senior Vice President of Energy Management

Lisa has served in numerous energy management roles since joining Tri-State in July 2004, including her previous role as Vice President of Planning and Analytics with responsibility for Tri-State’s resource planning process. With over 30 years of experience in the energy industry, she has also held roles in energy trading and operations, organized market implementation, and fuel supply and transportation and is currently engaged on key reliability and greenhouse gas initiatives within the industry. Lisa has held a NERC Balancing, Interchange and Transmission certification since 2007 and has a Bachelor of Science degree in political science. 

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Tri-State Generation and Transmission Association
Office: 303-452-6111
1100 West 116th Avenue
Westminster, CO 80234

Mailing address:
PO Box 33695
Denver, CO 80233-0695

©2025 Tri-State Generation and Transmission Association, Inc. Power supplier to the rural west.

  • About Us
    • Annual Report
  • Powering the Future
    • Our Energy Mix
  • Electrify and Save®
    • On-Bill Repayment
    • Programs
    • Quality Install
  • Media
    • Resources
    • Blog
    • Features
    • News
    • Newsletter
    • Podcast
  • Cooperative Benefits
  • Operations
  • Search