Gary Permian

Gary Permian, LLC is a privately held upstream oil and gas company formed in 2015 and headquartered in Denver, Colorado.

About Gary Permian

Gary Petroleum Partners, LP formed a partnership with Old Ironsides Energy, LLC, a leading independent oil and gas investment manager, to pursue the acquisition and development of upstream assets in the Permian Basin under the name Gary Permian, LLC. The Gary Permian management team is a group of seasoned energy professionals who possess broad upstream and midstream experience, ranging from conventional exploration in the Mid-Continent and deep onshore Louisiana to unconventional resource play development in the Piceance, DJ, Bakken, Eagle Ford and Permian Basins. The team's initial focus will be on the acquisition and development of core Permian Basin assets.

About Old Ironsides

The Old Ironsides team is comprised of an experienced group of industry experts who have built a multi-billion dollar platform for energy investments and have a strong history of creating value in the oil and gas industry. Through consistent application of its investment strategy, Old Ironsides Energy has a proven track record achieved through a combination of investment flexibility and long-term alignment with partners. For more information on Old Ironsides, please visit

Our Values

Gary Permian is founded on a commitment to core values that, in our ever-changing world, remain constant. Reflecting what is important to us, these fundamental beliefs are guiding principles for our behavior, decision-making and relationships.


We set high performance expectations and accept responsibility for our actions, the quality of our work and the results we achieve as individuals, as team members and as a company.


We are committed to providing consistent and reliable service, and strive to understand and meet the needs of our clients and colleagues.


We are dedicated to, and are accountable for, keeping ourselves and colleagues safe. Our aim is to maintain the highest standard of health and safety for our employees, service organizations and landowners.


We are committed to carefully and responsibly manage and protect our natural resources and the communities in which we work.


Samuel Gary Jr | Non-Executive Chairman

Sam Gary Jr. founded Samuel Gary Jr. & Associates, Inc. in 1983. Mr. Gary set his company apart from his peers by taking an innovative leadership approach to environmental stewardship from the beginning. Actively involved in managing company operations and not one to follow industry trends, Mr. Gary incorporates his personal principals of environmental stewardship into responsible company drilling practices.

Throughout his 35+ year career, Mr. Gary has developed and sold significant oil and gas projects in Kansas, Colorado, Louisiana, Wyoming and North Dakota. Mr. Gary and his team have drilled more than 600 wells, and have generated more than $1.4 billion in aggregate returns. Mr. Gary has spearheaded joint venture partnerships with firms including Enron, Kaiser Francis, Orion and Liberty Energy. Mr. Gary was also an early adopter of 3D seismic technology, horizontal drilling and multi-stage hydraulic fracturing.

Mr. Gary has a passion for nature and its preservation, which is evident through his other diverse interests - rancher, outdoorsman, falconer and advocate for the preservation of wildlife. Mr. Gary and his wife, Kate, have formed the Samuel Gary Jr. Family Foundation to support and further the missions of several non-profit, environmental organizations. Mr. Gary is also a member of the Peregrine Fund Board of Directors.

Samuel Gary Jr. graduated with a B.S. in Geology from the University of Colorado and spent several years as a geologist with Standard Oil of Ohio.

Craig Ambler | Non-Executive Vice Chairman

In June 1987, Craig joined Sam Gary Jr. at Samuel Gary Jr. & Associates. Mr. Ambler has a B.B.S. in Mineral Land Management and Finance from the University of Colorado and began his career working in the oil fields as a roustabout in the Green River Basin of Wyoming, later moving into various property management and development positions for Petro-Lewis Corporation and Cox Oil and Gas prior to joining Samuel Gary Jr. & Associates.

In their 30 years together, Mr. Ambler and Sam have built an organization that is on the forefront of the industry, exhibiting an unrelenting passion for the business. They have built a strong management and technical team and led a series of major transformative events - from their first foray into Kansas in the early 1990s, to forming a JV with Enron in South Louisiana in the late 1990s, to selling their Piceance position to Williams in 2009, to becoming one of the lowest cost, highest producing companies in Kansas on the heels of the 2008/2009 financial crisis. The key message has always been an urgent focus on "doing the right thing," no matter how difficult or uncomfortable.

Management Team

Darrin Henke | Chief Executive Officer

Darrin joined Gary Permian as the CEO in November 2015 with more than 25 years of operational experience at Encana Corporation, Tom Brown Inc., and Burlington Resources. In his most recent position at Encana, Darrin was General Manager for the Southern Operating Area, which was responsible for activity in Texas, New Mexico, Louisiana and Mississippi. During his tenure as GM in the Permian, he integrated the Athlon acquisition into Encana, growing the production from 30,000 Boepd to 50,000 Boepd in one year while managing a $750 million drilling budget. From the Piceance to the DJ Basin to the Permian Basin, Darrin led Encana's efforts with new technical approaches that put Encana at the forefront of development in each area. While serving as Interim President of USA Operations, he was responsible for $2.3 billion of gross capital investments in 2013.

Darrin graduated summa cum laude with a B.S. in Mechanical Engineering from Texas Tech University and also completed Duke's Advanced Management Program. He was the recipient of the Denver Business Journal's 2013 Power Book Award for outstanding business leadership, and currently sits on the board of CACI - Colorado's State Chamber of Commerce.

Lonnie Brock | Chief Financial Officer

Lonnie serves as the CFO for both Gary Permian and Samuel Gary Jr. & Associates and has 30 years of related energy experience. Prior to joining Samuel Gary Jr. & Associates in 2009, he served as the CFO for four Denver-based, public oil and gas companies - Double Eagle Petroleum Company, Teton Energy Corporation, Gerrity Oil & Gas Corporation and Western Gas Resources, Inc. Lonnie has been influential in acquisitions and financings that have grown the balance sheets of companies by 15x, and has also held board positions with public oil and gas companies. He has managed over 40 financings, 26 of which have been in the public markets. With a B.S. in Accounting from Eastern Illinois University, Lonnie began his career with Price Waterhouse.

With his knowledge of capital markets, he was able to strengthen Gerrity's balance sheet to position it for a merger of its Wattenberg assets with Snyder Oil, which resulted in the creation of Patina Oil & Gas Corp., subsequently acquired by Noble Energy. While at Western Gas, he was instrumental in acquisitions and financings related to approximately $1.5 billion of balance sheet growth, moving Western Gas from a small private player to a well-known public company, which was later sold to Anadarko for $6 billion.

Julia Gwaltney | Vice President, Strategic Planning & Development

Julia joined Gary Permian as VP, Strategic Planning & Development in November 2015 with more than 20 years of operational experience at Samson Resources, Encana Corporation and Burlington Resources. In the last 18 months at Samson Resources as Vice President of Western Operations, Williston well performance improved by 50%, the divisional unit lifting cost decreased by 18% and the development plans for the Green River and Powder River Basins transformed from a conventional to a resource-oriented focus involving drilling locations with repeatable results. During her 14 years at Encana, Julia consistently optimized cash flows and asset value in the areas she managed in the Western U.S. At Encana, Julia held roles of increasing responsibility with the last position being Vice President and General Manager of Western Operations. Notable achievements include doubling Jonah Field total recovery through down spacing approvals, establishing two joint venture agreements that funded a majority of drilling capital in exchange for minority revenue interest, executing $500+ MM capital programs while driving down well costs and increasing well performance in both Piceance and Jonah. Julia also has experience developing the strategy, planning and assessment of new areas. Her areas of achievement have included acquisition assessment, risk analysis and evaluation of exploration and exploitation projects since the beginning of her engineering career.

Julia received her BS in Petroleum Engineering from the Colorado School of Mines.

Michael H. Asher | Vice President, Business Development

Mike joined Gary Permian in March 2016 with nearly 40 years of oil and gas experience. After graduating from Colgate University and earning a JD at South Texas College of Law, Mike began his career in 1977 by learning all facets of the oil business with E. Doyle Huckabay, Ltd. Staking locations, negotiating with land and mineral owners, overseeing drilling, and reporting to partners, it was a valuable and formative experience. In 1986 he co-founded Caza Drilling and Exploration Company where he was responsible for managing the drilling of exploration wells throughout the Rocky Mountains. In 1991 Mike co-founded Westport Oil and Gas Company where he established himself as a facilitator for buying and selling oil and gas assets. After helping launch Westport, Mike formed Michael H. Asher, Inc. in 1994 to assist companies in the acquisition and divestiture of oil and gas properties. In addition, Mike served as a partner in Berco Resources with responsibility for the purchase of oil and gas assets.

Jeff Villalobos | Operations Manager

Jeff joined Gary Permian as Operations Manager in February 2016 with more than 15 years of operational experience at Encana Corporation and Schlumberger. In his most recent position with Encana, Jeff was Drilling Manger for Encana's Permian Asset. Some of Jeff's prior positions with Encana included Drilling and Completions Manager for Encana's San Juan Asset, as well as Completions Manager for Encana's Southern Operating Area in which he managed completion operations for Encana's Haynesville, TMS, Eagle Ford and Permian assets.

During his 9 year tenure at Encana, Jeff was responsible for integrating and increasing operational activity as part of the Eagle Ford and Permian acquisitions. Overseeing a $350 MM budget as Completions Manager for the Permian, Jeff's focus on execution excellence helped lead his team to a 30% well cost savings year over year. As drilling manager his team executed and drilled some of the fastest and longest lateral wells in the basin.

Jeff graduated in 2001 with a Bachelor of Science in Mechanical Engineering from Texas A&M University.

Contact Us

For more information, please contact Gary Permian by phone or email

1515 Wynkoop Street, Suite 700, Denver, Colorado  80202
Phone:  303.831.4673  •  Fax:  303.863.7285
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