Matt D. GentryMatt Gentry

Founding Member
President and Chief Executive Officer

Matt serves as President and Chief Executive Officer for Monadnock. With more than 15 years of experience in the oil and gas industry, Matt has put his broad geological and engineering skillset to use in the operational management of a wide range of assets. A proven leader, Matt brings in-depth knowledge and expertise in operations, risk management, and technically focused opportunity evaluation, culminating in a successful acquisition and divestiture track record. Matt has developed oil and gas projects that led to the successful divestment of those properties for over $350 million within the Eagle Ford Shale play of South Texas and the Permian Basin’s Wolfcamp Shale play in West Texas. Additionally, he has drilled and completed over 100 vertical and horizontal unconventional wells. Matt’s reputation among his industry peers is evidenced by his recent selection by Oil & Gas Investor magazine as one of the Top 20 oil and gas professionals under the age of 40. Matt’s most recent position was that of Vice President of Engineering and Business Development for Forge Energy, a $400 million EnCap and Pine Brook backed private company. Prior to Forge, Matt served as the Chief Operating Officer for Australian Securities Exchange listed Antares Energy.

Matt has a M.S. degree in geology from Texas A&M University and a B.S. degree in geoscience from Mississippi State University. Additionally, Matt is both a certified petroleum geologist and certified petroleum geophysicist by the American Association of Petroleum Geologists.

David WilliamsonDavid Williams

Founding Member
Vice President, Geoscience

David serves as Vice President of Geoscience at Monadnock. A certified petroleum geologist (AAPG) and certified professional geologist (AIPG), David has more than 15 years of oil and gas experience, having drilled hundreds of wells in a variety of conventional and unconventional assets. As an oil prospector, David takes a total petroleum systems approach and has proven success in both organic growth and exploiting additional value from existing fields. As a member of Pioneer Natural Resources’s New Plays and Shale Technology Team, David was instrumental in the characterization and growth of Pioneer’s North America unconventional asset portfolio inclusive of the Wolfcamp and Spraberry shale plays and helped realize a strategic $300 million acquisition during his tenure on the team. He was heavily involved in growing Pioneer’s Barnett Shale asset, planning and geosteering its first 50 wells in the liquids-rich Combo Play (which resulted in production growth to 10.3 Mboepd at the time of its successful divestiture for $155 million). David’s most recent position was that of Vice President of Geoscience at Forge Energy. At Forge, David grew the successful horizontal San Andres play concept from less than 7,000 gross acres to over 25,000 net acres.

David has a B.S. cum laude in geoscience and M.S. degrees in both geoscience and geographic information sciences from the University of Texas at Dallas.

Adam HowardAdam Howard

Founding Member
Vice President, Engineering

Adam serves as Vice President of Engineering for Monadnock. Adam has applied his technical and business acumen to acquire, study, and develop assets in plays throughout the U.S., South America, Asia, and Europe. Adam has packed nearly 9 years of industry experience with hands-on, value additive results in all play environments: onshore and offshore; conventional and unconventional; vertical and horizontal; primary, secondary, and tertiary projects. Adam blends technical reservoir and production engineering knowledge with extensive experience in financial modeling and risk management at the well, field, and company level. Adam most recently served as Reservoir Engineer for the private equity backed Forge Energy. At Forge, Adam managed a capital program with expenditures over the last two years of $260 million that resulted in drilling 60 horizontal San Andres wells. Additionally, Adam oversaw the production growth of Forge’s San Andres asset from less than 1,000 gross bopd to over 5,000 gross bopd. Prior to Forge, Adam was a Petroleum Engineering Consultant for Netherland, Sewell & Associates. A combination of technical understanding and sound business judgment is why some of the most respected companies in the industry have trusted Adam with their most valuable assets. He started his career as a Reservoir and Production Engineer at ExxonMobil.

Adam earned his B.S. degree in Mechanical Engineering from Texas Tech University.

Keith KimmeKeith-Kimme

Senior Technical Analyst

Keith serves as Senior Technical Analyst for Monadnock.  Previously, he spent over seven years at Netherland, Sewell & Associates where he was an Analyst Coordinator and the lead analyst on his team.  He has evaluated onshore and offshore fields in North and South America, Africa, Asia, Europe, and Australia and has particularly extensive experience studying horizontal plays, having joined the industry near the outset of the shale boom.  As a consultant, Keith used his analytical skills to assist small independents, major oil companies, and national oil companies with reserves and resources estimation, lawsuits, A&D transactions, exploration and development planning, and initial public offerings.

Keith earned a B.S. in Physics from the University of Texas at Austin and a M.S. in Materials Science at the University of Wisconsin - Madison.

Sharon BrunerSharon-Bruner

Office Manager

Sharon serves as Office Manager, Legal Assistant, and Organizational Genius for Monadnock. Prior to joining Monadnock, Sharon spent 14 years in the legal industry as a litigation paralegal working on a multitude of cases, including energy-related disputes.

Sharon earned her B.A. in Historical Studies from the University of Texas at Dallas.

Brandon G. Griess

Sr. Accounting & Finance Manager

Brandon oversees all finance and accounting operations at Monadnock. Brandon began his career with oil & gas as an investment associate with Prudential Capital Group’s oil & gas team where he focused on sourcing and underwriting new debt and equity investment opportunities as well as managing an existing portfolio of over $2.3 billion in investments. Additionally, Brandon served as the CFO for a start-up Delaware Basin water midstream company and has A&D experience working with mineral and non-operated assets across several basins. Prior to beginning his oil and gas career, Brandon served as an audit associate with PricewaterhouseCoopers, LLP and has also served for over 16 years as an Airborne Infantry Officer in the U.S. Army and Texas Army National Guard. Most recently Brandon was recognized in the inaugural class of 25 Most Impactful Veteran’s by Oil & Gas Investor magazine.

Brandon graduated from Texas A&M University with a Bachelor of Business Administration and Master of Science in Accounting and received an MBA from the Cox School of Business at Southern Methodist University. Brandon is a Certified Public Accountant.

John Sonsini

Land Manager

John serves as Land Manager for Monadnock. A Certified Professional Landman (CPL), John has over 10 years of experience in the oil and gas industry as a landman. John joined Monadnock in 2018 and currently manages the day to day land operations, including lease management, trades, farmout agreements, JOA’s, curative, division orders, regulatory matters and surface operations. John previously worked as an independent landman, working in the field as a consultant and Project Manager for both privately funded and publicly traded E&P companies, where he was an integral part of a wide range of projects across Texas, Oklahoma, New Mexico, North Dakota and West Virginia. Through his diverse land background, he has gained a wealth of experience and knowledge in all facets of the industry, which allows him to bring a unique perspective to Monadnock. John is a member of the AAPL, FWAPL and PBLA.

John has a B.B.A. from Midwestern State University.

Tim Schumer

Production & Facilities Engineer

Tim serves as Production and Facilities Engineer for Monadnock. Having designed, installed, and optimized hundreds of artificial lift projects with Schlumberger, Tim brings seven years of production experience to the team. At Schlumberger Artificial Lift, Tim implemented improved process and quality control to reduce non-productive time and service quality incidents in the Permian by 80%. Designing and scheduling efficient uses of capital, Tim now improves asset value by maximizing reserves while promoting a culture of safety within the field team that he manages. This is manifest in the superior run times and uptime Monadnock achieves as well as some of the most competitive lifting costs in the areas in which we do business.

Tim earned a B.S. in Chemical Engineering from the University of Notre Dame