Management
Leading a Dedicated Group of Experienced Professionals
Senior Officers
The principal officers of GLJ are active in all areas of our expertise and are available to respond to critical matters for existing and new clients.
Keith M. Braaten, P. Eng.
President and CEO
Keith M. Braaten has been a petroleum engineer in the oil and gas industry since 1979. Keith joined GLJ in 1985, advancing to his current position as President and Chief Executive Officer in 2011. His expertise includes domestic and international reservoir studies, corporate reserves evaluations, resource assessments, resource supply studies, enhanced oil recovery projects, field development plans and expert witness testimony. He has extensive petroleum related experience in Canada (including frontier areas) and in over 25 countries worldwide.
Jodi L. Anhorn, P. Eng.
Executive Vice President and Chief Operating Officer

Mr. Anhorn joined the firm in 1993 and is responsible for corporate evaluations and acquisitions & divestiture projects. Jodi has extensive experience in areas of corporate reserves evaluations, detailed field development studies, well test analysis, reservoir simulation, and served as the project lead on multi-discipline asset teams for numerous significant evaluation projects. Mr. Anhorn is an expert in the preparation of domestic and international unconventional resource assessments.
Officers
GLJ's executive officer team consists of experienced, professional engineers and geologists who have been active with the firm for a minimum of fifteen years. All have been involved in the study of oil and gas resources for a minimum of twenty years. The individuals pictured here provide leadership and guidance to our team of qualified professionals.
Corporate Evaluations Group
Independent corporate evaluation services for the needs of our clients, including corporate reporting, mergers, acquisitions, or dispositions are a key area of expertise for GLJ. Each of these officers leads a team of professionals focused on this critical service, in which GLJ is a recognized leader.
Terry L. Aarsby, P. Eng.
Vice President
Corporate Evaluations
Mr. Aarsby joined the firm in 1983 and is responsible for client corporate evaluations as well as evaluations for disposition and acquisition purposes. Mr. Aarsby has experience providing reserve and resource evaluations of North East British Columbia gas plays that include the Jean Marie, Horn River and Cordova Shale.
Caralyn P. Bennett, P. Eng.
Vice President
In Situ Oil Sands

Caralyn Bennett has over 26 years experience in the oil and gas industry. Caralyn first joined GLJ in 1990 and went on to co-found a private oil and gas company in the mid 1990’s. Since the late 1990’s, she has provided engineering and management consulting services to numerous clients, rejoining GLJ officially in 2010. Caralyn has extensive experience with enhanced oil recovery projects, in situ bitumen resource and reserve evaluations, merger and acquisitions and emerging business.
Myron J. Hladyshevsky,P. Eng.
Vice President
Corporate Evaluations
Since 1983, Mr. Hladyshevsky has been providing significant expertise with client corporate evaluations. Mr. Hladyshevsky compliments the depth of GLJ's proficiency of property and corporate acquisitions and divestments, and is especially knowledgeable regarding the evaluation of heavy oil and gas properties.
Bryan M. Joa,P. Eng.
Vice President
Corporate Evaluations
Mr. Joa has been with the firm since 1985 and is responsible for client corporate evaluations as well as evaluations for disposition and acquisition purposes. In addition to extensive experience in all aspects of Canadian property evaluations including deep basin gas and light oil and gas reservoirs, Mr. Joa has been responsible for the evaluation of oil and gas properties in China.
John E. Keith,P. Eng.
Vice President
Corporate Evaluations, Emerging Business
Mr Keith joined the firm in 1991 and has spent the past 15 years assisting emerging public and private companies in the evaluation of their oil and gas properties for banking, corporate transactions and regulatory reporting requirements. Mr. Keith’s extensive reservoir engineering experience combined with GLJ’s highly technical evaluation team provides a combination of expertise capable of efficiently handling all property evaluation needs of an emerging oil and gas business.
John H. Stilling,P. Eng.
Vice President
Corporate Evaluations
With the firm since 1982, Mr. Stilling is responsible for evaluations for corporate disposition and acquisition purposes, and for the direction of technical aspects of GLJ's information systems. Mr. Stilling is especially knowledgeable regarding the evaluation of gas and heavy oil properties.
Doug R. Sutton,P. Eng.
Vice President
Corporate Evaluations
Mr. Sutton has been with the firm since 1981 and is responsible for Canadian corporate evaluations. Mr. Sutton provides mergers and acquisitions advisory services including scoping and detailed analyses. Mr. Sutton has experience providing reserves and resource evaluations of stacked Cretaceous plays and the Montney, Viking, Cadomin, Cardium and Wilrich Formations.
James H. Willmon,P. Eng.
Vice President
Corporate Evaluations
Mr. Willmon started with the firm in 1982. He coordinates evaluations for a number of clients relating to reserves and resources disclosures, acquisitions and divestitures, and is responsible for the firm's oil sands mining evaluations. He has been an active volunteer of the SPE, and is a member of APEGGA, the Canadian Heavy Oil Association and the SPE.
International and Geosciences Groups
GLJ prepares reservoir studies and provides independent reserves evaluation and petroleum consulting services within most of the world's major oil and gas producing basins. Individuals within these groups have extensive experience in the analysis of geologically complex and technically challenging reservoirs.
Leonard L. Herchen, P. Eng.
Vice President
International Evaluations

Mr. Herchen joined the firm in 1993. He is responsible for reserve and resource evaluations, focused mainly in international and Canadian frontier areas. His group also has expertise in reservoir simulation. Mr. Herchen is skilled in providing domestic and international reservoir studies, corporate reserves evaluations, resource supply studies, and expert witness testimony. He is also responsible for the firm's commodity market analysis and price forecast.
T. Mark Jobin, P. Geol.
Vice President
Geosciences
Mr. Jobin has been with the firm since 1996, providing expertise in reservoir mapping, petrophysical analysis, 3D geological modeling, resource assessments and exploration prospect analysis. The Geosciences group of professionals has extensive experience, and conducts a wide range of studies, including unconventional resource studies, in domestic, frontier and international areas.