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About Us


Combining deep technical and commercial expertise with a broad range of global experience, our leadership team guides the firm in our vision, mission, and values of delivering quality service and advice to our clients, our people, and our communities.

Executive Leadership

Jim Chisholm P.Eng.

President and CEO

Jim Chisholm is currently the President and Chief Executive Officer at Sproule. With a 13-year tenure at Sproule and over 20 years of experience in the oil & gas industry, Jim is a seasoned engineering expert and business leader. Prior to his role as CEO, he was instrumental at expanding Sproule’s footprint in the Latin American market.  Focused on driving top-line growth for the organization, Jim brings a wealth of technical expertise in reserves and resource evaluations within all major classification systems across the world and has extensive unconventional, heavy oil and enhanced oil recovery experience.

Scott Pennell P.Eng.

Chief Operating Officer

Scott is Chief Operating Officer at Sproule.  He overseas Sproule’s global business operations and drives operational innovation throughout the organization. Scott has 25 years of experience in the oil and gas industry. His worldwide experience includes conventional and unconventional oil and gas resources. He is a deeply experienced engineering professional in the areas of reserves and resource evaluations, due diligence, and deliverability studies. Scott is currently a member of the program advisory committee at SAIT Polytechnic.

Christoffer Mylde M.Sc.

Senior Vice President, Corporate Development

Chris Mylde is currently Senior Vice President of Corporate Development at Sproule in Calgary. As part of the senior leadership team at Sproule, he drives the company’s global growth strategy. Chris has over 20 years experience and speaks frequently at industry events and conferences around the world on key trends in global energy markets. Prior to joining Sproule, Chris spent 10 years in corporate finance and advisory with HSBC in London, Hong Kong and Toronto and Simmons, a boutique advisory firm focused exclusively on the energy sector. He has a B.Sc. in Economics and Economic History from the University of Warwick and an M.Sc. in European Political Economy from the London School of Economics. Chris has been pleased to serve as the Norwegian Honorary Consul for Southern Alberta since January 2019.

Mark Van de Veen QC, JD, MBA, LLM

Senior Vice President, Corporate Services and General Counsel

Mark has over 30 years of experience working in various capacities in the oil and gas industry in Calgary as well as internationally. As Senior Vice President, Corporate and Legal, and Corporate Secretary with Sproule, he provides oversight to the organization’s HR, Administrative Services and IT functions, and advises the company with respect to all legal matters.

Steven Golko P.Eng.

Senior Vice President, Reservoir Services

An accomplished leader with a track record of driving innovation, Steve now leads Sproule’s Reservoir Services team comprised of over sixty geoscience, engineering and commercial experts around the world. Steve is an experienced engineer with 15 years of experience in the areas of reserves evaluations and audits, supply studies, security commission reports, and resource assessments. An industry thinker and innovator, Steve has written several papers on property evaluation methodologies and best practices and helped develop several new offerings at Sproule.

Randy Green P.Geoph.

Senior Vice President, Asset Management

Randy is Senior Vice President of Asset Management. He has over 33 years of technical and executive management experience in the oil and gas industry, working in both public and private companies. Randy founded, built, and sold two junior oil and gas producing companies prior to taking a leadership role at Niven Fischer in 2008. He was instrumental in building the brand, expanding the services, growing the company and delivering on a value-added promise prior to Sproule’s acquisition of Niven Fischer. In his role at Sproule, Randy is responsible for growing the asset management business to meet client’s needs in a cost-effective and efficient manner.  Randy balances his passion for business with a commitment to philanthropy and volunteerism including an eight-year term as a director of YMCA Calgary.

Sheldon McDonough

Managing Director, Energy Advisory

Sheldon is currently serving as the Managing Director, Energy Advisory with Sproule. He has 22+ years of experience in energy investment banking, corporate finance, mergers and acquisitions and business development. Sheldon has broad experience with clients ranging from private companies to large multinationals and NOCs throughout Canada, United States and Asia.

Alec Kovaltchouk P. Geo.

Vice President, Geoscience

Alec Kovaltchouk is responsible for leading the Geoscience department at Sproule. Alec has been a Sproule professional since 1997 and has over 32 years of industry experience. He has experience in Argentina, Brazil, Canada, Colombia, the Czech Republic, Indonesia, Kazakhstan, Mexico, Poland, Romania, Russia (Dagestan, Siberia and the Volga-Ural region) and Ukraine. His worldwide experience includes conventional and unconventional oil and gas resources, including shale gas and shale oil, heavy oil and oil sands, and coal bed methane. Alec is fluent in English, Polish, Russian and Ukrainian.

Colleen Thompson

Vice President, Finance

Colleen Thompson is currently serving as the Vice President, Finance for Sproule where she oversees the financial operations. She has over 33 years experience in private, public and corporate finance, in a variety of sectors including oil and gas service, engineering and professional services. Colleen is a Chartered Professional Accountant with global experience in regulatory compliance, corporate finance, financial reporting, budgeting, treasury, and tax.  A strategic leader with a track record of optimizing finance teams to run efficiently and streamlined, She also has experience providing fiscal oversight, strategic planning, mergers and acquisitions.

Senior Management

Attila Szabo P.Eng.

Senior Vice President, North America

Attila is Senior Vice President of the Canada and U.S region. He has over 35 years of industry experience supporting acquisition, disposition and investment opportunities, technical due diligence, and financial and annual reporting requirements for various projects in Canada and internationally in Pakistan, India, China, Kuwait and the United States. He has also provided support to legal teams for litigation, and has provided expert witness testimony. In his current role, Attila is focused on developing and maintaining client relationships and on building market strategies to expand Sproule’s footprint in North America.

Danilo Bandiziol

Vice President, Europe, Middle East, and Africa

Danilo is an experienced oil & gas professional, having over 30 years of international career with large integrated oil and gas organizations and service companies. From field engineering to reservoir management, he has held various technical and managerial positions across the E&P industry’s development and production spectrum. Danilo has extensive experience in reserves and resources assessment (PRMS, SEC, AIM) and has a strong track record in leading integrated subsurface studies and volumetric estimations. In his current role, Danilo is focused on helping clients find best-fit solutions for their technical and commercial challenges. Danilo is currently member of the SPEE and member of the SPE Oil and Gas Reserves Committee (OGRC)

Jorge Milanese

Regional Director, Latin America

Jorge Milanese is Sproule’s Regional Director of Latin America responsible for developing and executing Sproule’s client engagement strategy in the region.  Jorge is an experienced oil and gas professional with expertise in domestic and international business development, acquisitions and divestitures, corporate development and upstream assets management. He had a leading role in a wide range of conventional and unconventional energy projects in North and South America. His areas of expertise include upstream investment opportunity identification, both in conventional and unconventional reservoirs, financial and technical evaluation, strategy development and contract negotiation and administration of operated and non-operated joint ventures.

Richard Holst P.Eng.

Manager, Reservoir Characterization

Richard has over 26 years experience in integrated reservoir and gathering system simulation studies, including shallow gas, tight gas, shale gas, gas storage, coalbed methane, liquid-rich gas, black oil and fully compositional. He has supervised and conducted studies in both conventional and unconventional oil and gas. Richard has experience in Canada, the United States, the United Kingdom, Colombia, Gabon, Iran and Libya, and at Sproule he concentrates on performing oil and gas reservoir and pipeline simulation.

Richard Hares P.Eng.

Principal, Carbon Management

Richard is currently the Principal, Carbon Management for Sproule where he manages the Carbon Management practice area and helps clients chart the pathways to a net zero future. He has had experience in mapping the geological storage potential in Western Canada, providing insight into carbon dioxide storage resources required to support future low-carbon intensity products, and developed global benchmarking tools for CCUS through industry research projects with the University of Calgary. Richard has 12+ years of experience in resource evaluation and development as a petroleum and geological storage engineer, having worked in both Canada and the United Kingdom. Richard has an MSc. in Sustainable Energy Development.

Gary Finnis P.Eng.

Senior Manager, Engineering

As Senior Manager of Engineering Gary leads a cross-functional team responsible for reserves and resources evaluations and audits around the world. He is a project leader, supervisor and responsible member for various reserves evaluation and audit projects across North America. Gary has over 20 years of industry experience and supports companies in reporting on oil and gas assets to standards such as NI 51-101, the SEC, and SPE-PRMS.

Doug McNichol P.Eng.

Senior Manager, Engineering

Doug is a Senior Engineering Manager at Sproule, having joined the firm in 2013.  He brings over 40 years of industry experience including 25 years in management and executive roles in junior and senior E&P companies.  Doug is a project leader, supervisor and responsible member for various reserves evaluation and audit projects across North America.

Meghan Klein P.Eng.

Senior Manager, Engineering

Meghan Klein is a Senior Engineering Manager leading a dynamic team involved in reservoir characterization, reserves evaluations and audits. She conducts technical and responsible member reviews and is a project leader for various reserves evaluation and audit projects, due diligence projects and strategic advisory projects in Canada, the United States (Williston Basin), North Sea (United Kingdom), Africa (Cote d’Ivoire, Nigeria), Thailand, China, Indonesia, Australia, and Iraq. Meghan supports global E&P companies reporting on oil and gas assets in standards such as NI 51-101, SEC, PRMS and SKK Migas for listings on the Canadian and US exchanges, AIM (London Stock Exchange), and Hong Kong Stock Exchange.

Alan Burzlaff P.E.

Senior Manager, Engineering

As Senior Manager, Engineering, Alan is responsible for managing Sproule’s Bakersfield office and is a key member of the team spearheading Sproule’s business development initiatives in the U.S. market.  Alan’s 40-years of oil and gas industry experience includes reserve and contingent resource evaluations, reservoir simulation, thermal recovery, waterflood evaluation, steam flood evaluation, gas storage and compressed air energy storage, acquisitions, divestitures, U.S. Security and Exchange Commission reports, reserve audits, and international property evaluations. Alan also provides expert witness reports and testimony. Prior to joining Sproule, Alan held various technical and management positions with MHA Petroleum Consultants, SERCO, Inc., SI International, Intera Information Technologies, Jerry R. Bergeson & Associates, and Tenneco Oil E&P.

Robert Warholm P.Eng.

Senior Manager, Quality and Assurance

Rob is Sproule’s Senior Manager of Quality and Assurance within the Engineering Services Group. He has over 31 years of industry experience conducting petroleum and natural gas evaluations including acquisitions, dispositions, technical due diligence, and financial and annual reporting for numerous projects globally. He has also provided support to legal teams for litigation and has worked on large regional studies regarding the assessment of carbon dioxide EOR potential. Rob supports companies in reporting on oil and gas assets within the NI 51-101, SEC, and SPE-PRMS standards.