Our Team

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GLJ possesses a diverse experienced technical team with an exceptional track-record of delivering reliable results and high quality performance for a broad list of Canadian and international clients. Our clients range from emerging producers to large integrated multi-national E&P’s, financial institutions, legal firms, investment bankers, government agencies, as well as mid-stream and transmission companies.

GLJ’s professional team of engineers and geoscientists are committed to providing unparalleled customer service using our flexible proprietary software, in conjunction with industry leading software, to customize results to suit client needs.

Senior Officers

Jodi L. Anhorn
P. Eng.
President and Chief Executive Officer

Mr. Anhorn joined the firm in 1993 and is responsible for corporate evaluations and acquisitions and divestiture projects. His extensive experience includes reserves and resource evaluation, detailed field development studies, and rate transient analysis. He has served as the project lead on multi-discipline asset teams providing buy-side technical and economic analysis. Mr. Anhorn is an expert in the preparation of domestic and international unconventional resource assessments and the appropriate securities disclosure rules.

Caralyn P. Bennett
P. Eng.
Executive Vice President and Chief Strategy Officer

Ms. Bennett first joined GLJ in 1990 and later went on to cofound a private oil and gas company. Returning to GLJ in 2010, Ms. Bennett has been promoted progressively to her current role as Executive Vice President and Chief Strategy Officer. Highlights of her expertise include reserves and resource governance, mergers and acquisitions, emerging technology and business strategy. Her firm belief in the value of collaboration, continuous improvement and innovation extends to her work as an active committee member of the Petroleum Advisory Committee to the Alberta Securities Commission, the Industrial Curricular Advisor Committee, Department of Civil and Environmental Engineering for the University of Waterloo and the Membership and Recognition Committee of the Society of Petroleum Engineers, Calgary Chapter. Ms. Bennett resides as the President of the Canadian Heavy Oil Association and sits on the board of the Canadian Society of Unconventional Resources. She is a passionate advocate for excellence and progressing energy industry initiatives to responsibly meet the needs of society through both incremental improvement and disruptive step-change. In 2019, Ms. Bennett received the Society of Petroleum Engineering Calgary Section award for Outstanding Role Model for Women in our Industry.

Chad P. Lemke
P. Eng.
Executive Vice President and Chief Operating Officer

Mr. Lemke joined GLJ in 2004 and is responsible for client corporate evaluations, as well as evaluations for disposition and acquisition purposes. His expertise includes domestic and international reservoir studies, corporate reserve evaluations, resource assessments and expert witness testimony. Mr. Lemke has extensive experience evaluating unconventional and shale resources around the world, including the Duvernay, Utica, and Vaca Muerta.


Tim R. Freeborn
P. Eng.
Vice President & Chief Financial Officer
​Mineable Oil Sands and Shales

Mr. Freeborn has been with the firm since 1999 and is responsible for corporate evaluations as well as disposition and acquisition projects. Mr. Freeborn has been involved in a variety of reservoir engineering and economic evaluations in the Western Canadian Sedimentary Basin including coal bed methane (CBM), heavy oil and enhanced oil recovery projects. Mr. Freeborn is responsible for the evaluation of all of the operating integrated mineable oil sands projects in Alberta for various clients.

Leonard L. Herchen
P. Eng.
Vice President
​International Evaluations

Mr. Herchen joined GLJ in 1993 and is principally responsible for international and Canadian frontier evaluations and reservoir studies. Since that time, Mr. Herchen has evaluated reserves and resources in over 40 countries. He is a skilled provider of reserves and resource opinions, corporate evaluations, economic models, reservoir advisory services and resource supply studies and has developed and delivered training programs for reservoir evaluation teams. He has offered expert witness testimony on pipeline tolls, economic damages and land valuation.  Mr. Herchen is also responsible for the firm’s commodity market analyses and price forecasting and previously served on the Board of Directors of Verdazo Analytics, a data visualization and analytics firm.

Todd J. Ikeda
P. Eng.
Vice President
​Corporate Evaluations

Mr. Ikeda joined the firm in 1994 and is responsible for client corporate evaluations as well as evaluations for acquisition and dispositional purposes. Mr. Ikeda has experience providing conventional and unconventional reserves and resource evaluations for international and domestic oil and gas plays.

Patrick A. Olenick
P. Eng.
Vice President
International Evaluations

Mr. Olenick joined GLJ in 2003 and is responsible for international and Canadian frontier reserves, resources, and economic evaluations. Mr. Olenick's experience also includes secondary and tertiary enhanced oil recovery schemes. Since joining GLJ’s international evaluations group, Mr. Olenick has provided reserves and resources evaluations for oil and gas basins in over 15 countries across the globe. Mr. Olenick is well versed in probabilistic and risk analysis, with significant experience in the evaluation of exploration prospects and associated portfolios.

Greg Owen
P. Eng.
Vice President
Business Development

Mr. Owen joined GLJ full-time in 2019, bringing over 24 years of experience in upstream and midstream oil and gas. After coming on board as a consultant in 2016, Mr. Owen is now responsible for new product business development, both nationally and internationally. His extensive experience includes work in operations, projects and development in offshore, and SAGD. At GLJ, Mr. Owen brings a focus on strategy, development planning, A&D, and operational excellence.

Graham P. Simpson
Ph.D., P. Geo.
Vice President

Dr. Simpson joined GLJ in 2012 and is responsible for the Geosciences department which works on a diverse range of international and domestic energy projects.  Dr. Simpson’s technical expertise is on evaluations of stratigraphically and structurally complex fields. In addition, Dr. Simpson develops and presents courses on a variety of subjects for GLJ, universities and clients. These subjects include: geology and the energy industry for non-geologists, geology in reserves analysis, core interpretation workshops, integrating geology and engineering in reserves analysis and advanced geological training.