About Us
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Who We Are
Future Thinking.
As global energy consultants, GLJ’s expertise has evolved over the past 50 years to meet the world’s need for responsible, sustainable energy. Our team of engineers, geoscientists and business professionals are international leaders in both emerging and traditional energy services. We are future-thinking and have a proven track record of helping our clients find the right sustainable solution to thrive in our new world of energy.
GLJ helps businesses navigate the changing landscape and gives them confidence when taking the next step with tailored sustainable strategies. Regardless of the phase of your project, or your business sector, our talented team is here for you!
Senior Officers
Jodi L. Anhorn 
M. Sc., P. Eng.
President & CEO
Jodi joined the firm in 1993 and is responsible for corporate evaluations, acquisitions and divestiture projects. His extensive experience includes reserves and resource evaluation, detailed field development studies and rate transient analysis. Jodi is an expert in the preparation of domestic and international unconventional resource assessments and the appropriate securities disclosure rules. He served as the project lead on multi-discipline asset teams where he provided buy-side technical and economic analysis.
Caralyn P. Bennett
P. Eng.
CSO & Executive Vice President
Ms. Bennett is Executive Vice President and Chief Strategy Officer of GLJ, where she specializes in reserves and resource governance, emerging technology, energy diversification, business collaboration and strategy. Ms. Bennett serves as a committee member of the Petroleum Advisory Committee to the Alberta Securities Commission, the Industrial Curricular Advisory Board, 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. She sits on the Board of publicly traded transformational clean-tech innovator Acceleware Ltd, is Co-Chair of the Canadian Society of Unconventional Resources and is the President of the Canadian Heavy Oil Association. Ms. Bennett has a Professional Engineer designation with an Honours B.A.Sc. in Geological Engineering from the University of Waterloo.
Chad P. Lemke
P. Eng.
COO & Executive Vice President
Chad 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. Chad has extensive experience evaluating unconventional and shale resources around the world, including the Duvernay (Alberta, Canada), Utica (Northeast U.S.) and Vaca Muerta (Argentina).
Officers
Tim R. Freeborn
P. Eng.
CFO & Vice President, Mineable Oil Sands and Shales
Tim has been with the firm since 1999 and is responsible for corporate evaluations, as well as disposition and acquisition projects. He 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. Tim is responsible for the evaluation of all of the operating integrated mineable oil sands projects in Alberta for various clients. Tim is also excited to be leading GLJ’s Biomass and Biofuels group, and hopes his expertise in bitumen extraction and upgrading can be applied to support the growing Biomass & Biofuel industry.
Leonard L. Herchen
P. Eng.
Vice President, Technical Advisory
Leonard joined GLJ in 1993 and is principally responsible for international and Canadian frontier evaluations and reservoir studies. Since that time, he has evaluated reserves and resources in more than 40 countries. Leonard 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. Leonard is also responsible for the firm’s commodity market analyses and price forecasting.
Todd J. Ikeda
P. Eng.
Vice President, Corporate Evaluations
Todd joined the firm in 1994 and is responsible for client corporate evaluations as well as evaluations for acquisition and dispositional purposes. He has extensive 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
Patrick joined GLJ in 2003 and is responsible for international and Canadian frontier reserves, resources and economic evaluations. His experience also includes secondary and tertiary enhanced oil recovery schemes. Since joining GLJ’s international evaluations group, he has provided reserves and resources evaluations for oil and gas basins in more than 15 countries across the globe. Patrick 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, New Ventures & Technical Services
Greg joined GLJ full-time in 2019 and brings more than 24 years of experience in upstream and midstream oil and gas. After coming on board as a consultant in 2016, Greg 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 steam-assisted gravity drainage (SAGD). At GLJ, Greg brings a focus on strategy, development planning, acquisitions and divestitures and operational excellence.
Colleen Sherry
MSC, MBA, MSL
Vice President, Sustainability & Emissions Management
Colleen Sherry is the current and inaugural Vice President, Sustainability & Emissions Management, at GLJ. Colleen supports GLJ’s expanding strategic advisory capacity in decarbonization, energy transition, ESG reporting, responsible production certification, and emerging technologies. Colleen is a sustainability, geotechnical and business strategy specialist with more than 25 years of operational and leadership experience, largely in the energy and natural resource extraction sectors. Her expertise has supported client sustainability strategy assessment and development in numerous jurisdictions worldwide.
Graham P. Simpson
Ph.D., P. Geo.
Vice President, Geosciences
Graham joined GLJ in 2012 and is responsible for the Geosciences department which works on a diverse range of international and domestic energy projects. His technical expertise includes evaluations of stratigraphically and structurally complex fields. In addition, Graham 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.
Indigenous Commitment Statement
Partners
We give you access to expertise from more of the world’s leading firms.
We’re proud to work with partners like Aucerna, Xi Technologies, Interface Fluidics, the University of Waterloo and Universidad de Colombia. We leverage our own strengths and expertise alongside theirs in order to best benefit our unmatched client base.
Together we can build stakeholder trust and reinforce Canada’s position as a global energy powerhouse.
Community Involvement
Our commitment to our community runs deep.
Our team has always been active in our community through both individual and corporate giving and volunteering efforts. Annually, GLJ donates to over 50 local charitable organizations, including medical groups, social aid agencies, amateur sports organizations and professional groups.
Professional Organizations
At an organizational level, our contribution includes advocating for professional groups within the energy industry.
GLJ Toolbox
We leverage industry software to meet your needs.
Contact Us
If you are interested in hearing more about who we are, what we do and how we can help – we’d love to chat more.