Senior Management

David Hackworth joined Gas Field Services as the Chief Operating Officer in 2025.  He brings a diverse set of experiences in the Oil and Gas space as well as in industry.  He served as a Vice President at CNX Resources (formerly CONSOL Energy) including time in Internal Audit, Diversified Business, FP&A, Joint Ventures and Corporate Strategy. 

David also served as a CFO at a manufacturing company and got his start working in finance and as an industrial engineer, supply chain manager and production planner.  David is a native of Pittsburgh, PA where he resides with his wife and three children.  He is a graduate of the University of Pittsburgh (BA Economics, MS Industrial Engineering) and The College of William and Mary (MBA).

Stephanie Shrader is an unwavering administrative professional whose education and background drive her to provide quality service and support to our customers every day.  Following successful roles in the pharmaceutical, hospitality, and food service industries, Stephanie joined Gas Field Services in 2006 and has been instrumental in both forming the foundation and further development of the company. 

Stephanie’s confident and cheerful disposition makes her a natural as the primary administrative point of contact for our customers who trust her critical roles in invoicing, supplying timely and accurate reports, and data transfer.  While working at the Rosedale headquarters, Stephanie also provides support on strategic initiatives, human resources, and other business and office management functions.  Should you have any administrative questions, please contact Stephanie.

Denise Ezzell is an experienced accounting professional with more than 30 years of expertise in accounting, bookkeeping, payroll, human resources, and financial administration. Her diverse background spans the private, public, and government sectors, where she has held key roles involving payroll processing, tax administration, accounts payable and receivable, invoicing, and the preparation of financial reports and statements.

At Gas Field Services, Denise oversees general accounting and bookkeeping operations while serving as an integral member of the administrative team at the company’s Rosedale headquarters. In addition to managing financial functions, she is responsible for maintaining customer reports, tracking systems, onboarding, payroll processing, and Human Resources operations. Her extensive knowledge, organizational skills, and commitment to accuracy make her an asset to the organization.  Please contact Denise if you have any accounting, payroll, or Human Resources questions.

Millicent Carter joined the administrative team of Gas Field Services in 2018.  A results-driven professional with over eight years of experience in the oil and gas industry and more than 13 years as a successful business owner. She has a proven track record of leadership, team motivation, and driving operational efficiency in fast-paced environments. Proficient in computer systems and business operations, with the ability to streamline processes and manage multiple priorities effectively.

Passionate about leadership, continuous growth, and creating value through both strategic thinking and hands-on execution. As part of the Gas Field Services Administrative team, Millicent serves as an invoice/billing specialist.  She is eager to assist the customer and can be reached by clicking the button below.

Monte McReynolds has over 20 years of experience in completion, production, cementing, and special services in the oil and gas industry.  Eleven of those years have been in various leadership positions. He has contributed immensely to GFS for eight years, proving himself to be a dependable and valued team member.

Monte is a trucking manager and is currently tasked with day to day oversight, management, and safe operations of a large segment of our water hauling in the northern district.  His experience and background are a welcome addition to the business unit, helping it grow while maintaining the quality of service that exceeds the expectations of our customers.

Larry Cavallo is a technically trained professional who has over thirty years of experience in leadership roles within the exploration and production industry.  Those roles include geology, operations and reservoir engineering, business planning, drilling, completion, and production of shallow conventional, coalbed methane, and horizontal Marcellus and Utica wells across the Appalachian, Michigan, and Black Warrior Basins. 

Larry is using his experience and considerable Appalachian contacts in a business development and third-party consulting role for Gas Field Services.  He serves as Gas Field’s initial point of contact for new customers, on acquisitions, the expansion of its service lines, and as a consultant available for hire in any of his areas of expertise.   Please contact Larry at the following email address if you desire to learn more about the services provided by Gas Field Services, have related assets for sale, or have a need for exploration and production consulting services.

Jared Murray joined Gas Field Services in 2020, bringing 14 years of hands-on experience in completions, cementing, engineering, and special services to his role within the business unit. His technical background in the oil and gas industry has given him a firsthand understanding of what it takes to deliver quality results in demanding environments.

In his current role, Jared oversees business operations, fleet and fuel management, information technology, procurement, and contract management. His ability to bridge the gap between field expertise and business operations makes him an asset as the team continues to grow. Jared is committed to building efficient, scalable processes while upholding the standard of service that our customers have come to rely on.

Bernie Dearth is a dedicated professional with more than 35 years of experience in coal trucking, transportation, oil and gas, environmental services, and water hauling. His background includes serving as an owner/operator of family‑owned trucking companies and as a general manager for multiple oil and gas service companies, where he specialized in hiring, strategic planning, and daily operational management.

Bernie has built a strong network across the coal, oil and gas, and transportation industries, giving him a deep understanding of the markets and customers he serves. Since joining Gas Field Services in 2017, he has played a key role in expanding trucking operations throughout Ohio, Pennsylvania, and West Virginia. Today, Bernie oversees all company hiring efforts and remains a trusted resource for employees and customers. If you are interested in working with us please reach out to Bernie!

Ryan Majic serves as the HSE Manager for Northern Division Operations and Trucking at Gas Field Services. Since joining GFS in 2019, he has brought more than 20 years of professional safety experience, with extensive expertise in safety, compliance, construction, drilling, completions, production, and water transfer operations.

In his role, Ryan oversees safety and compliance initiatives, educates employees on company policies and regulatory requirements, and supports customer compliance efforts. He also plays a key role in developing and implementing safety programs, conducting field audits and inspections, facilitating training, and leading incident investigations. Ryan’s dedication to safety, regulatory excellence, and ethical leadership continues to strengthen and promote a proactive safety culture throughout Gas Field Services.

Scott Sias is a seasoned trucking and operations professional with 38 years of experience in the Appalachian oil and gas transportation industry. Throughout his career, Scott has successfully managed a wide range of trucking operations, including water hauling, sand transportation, heavy-haul rig moves, and hotshot services. He has also played a key role in the startup and growth of multiple rapidly expanding companies with multi-terminal operations.

At Gas Field Services, Scott works closely with the management team, drivers, and customers to support safe, efficient, and dependable trucking operations. Drawing on his extensive industry knowledge and leadership experience, he focuses on driver retention, operational excellence, business growth, and maintaining strong customer relationships to ensure the highest level of service for clients throughout the region.