Leslie Shockley Beyer


Leslie Beyer is President of the Petroleum Equipment & Services Association (PESA) in Houston, Texas. In this role, Leslie the leads strategic development of PESA’s advocacy, government affairs and workforce programs in support of the oilfield services and equipment sector. Working with PESA’s Board of Directors, she serves as primary advocate for key OFS sector priorities, including technological innovation, environmental progress and skilled workforce. She is the host of PESA’s Energy in Transition podcast.

Highlights of Beyer’s career include 15 years in Washington, D.C. serving in the U.S. Senate, multiple presidential campaigns, The White House – Executive Office of the President, U.S. State Department and U.S. Department of Housing and Urban Development. Beyer also has extensive experience in public affairs, in leadership roles at Burson-Marsteller Public Affairs and a boutique public relations firm for more than six years. Most recently, Beyer served as Director, Member and Board Relations with the National Association of Manufacturers (NAM), collaborating with NAM member companies on targeted priority legislative issues and advocacy efforts, primarily in the energy industry. 

Beyer holds a BA in Latin American Studies and Spanish from the University of Texas at Austin. She is an Independent Director on the Board of Natural Gas Services Group, Inc. in Midland, TX, currently as Nominating Committee Chair. She also serves on the Boards of the World Affairs Council of Greater Houston and IPAA/PESA Education Advisory Board. She is a former Independent Director at Pemex Procurement International (PPI) and served on the U.S. International Trade Administration’s U.S.-Mexico Energy Business Council.

Molly Determan

Vice President Strategy & ProgramsMolly Smart

Since 2013, Determan has led PESA’s communications efforts, including the rebranding of the Association. Additionally, she serves as the staff leader for PESA committees, including those focused on developing member companies’ high performers, as well as the acclaimed Foreign Service Officer Training Program. Determan works directly with PESA leadership and executives to execute the PESA engagement and growth strategy.

Prior to joining PESA, Determan provided private PR consulting services across multiple industries and held senior positions with the Girl Scouts of Southern Alabama. In these roles, Determan won regional and national awards for publications and marketing campaigns.

Determan has bachelor’s degrees in Journalism and German from Samford University in Birmingham, AL. Determan is an active member of Rotary International and led a vocational exchange team to Portugal in 2012.

Tim Tarpley

Tim TarpleyVice President Government Affairs

Tim Tarpley oversees PESA’s Policy, Government Affairs, International Trade Policy, Environmental Policy, Mexico Task Force and Legal committees developing and implementing an integrated strategic plan to advance PESA’s policy positions; broaden awareness of its programs and priorities, and increase the visibility of its positions across key stakeholder audiences.

Tarpley most recently served as Chief of Staff to Congressman Ted Poe (R-TX) and began his legislative career as an aide to Congressman Thornberry (R-TX). As a lynchpin of Congressman Poe’s staff for more than nine years, Tim worked on permitting the Keystone pipeline and ending the crude oil export ban.

Tarpley holds a juris doctor from Creighton University School of Law and a master of laws from American University Washington College of Law.


Kevin Broom

Director Communications

Stephanie Fuqua, PESA

Stephanie Fuqua

Marketing & Communications Specialist







Peggy Helfert, PESA

Peggy Helfert

Senior Director Membership Services







Carolynn Henriquez

Director Membership Services



Marina Ouano

Finance Director







Amy Street

Amy Street

Events Specialist








Maria Suarez

Director Government Affairs

2021 Programs

PESA’s exclusive executive training programs are now live, including the Executive Leadership Program, Inclusion & Diversity Business Champion and ESG Certification Program. Plus, the new PESA Certified Executive.