Our Experts

By rewarding innovative thinking and problem-solving, APEX Petroleum Engineering has experienced some of the industry's highest returns in shale gas.
  • John D. Harkride

    John D. Harkrider

    Director

  • Bill Anthony

    Bill Anthony

    Director

  • Mitch Kniffin

    Mitch Kniffin

    Director

  • Ted Randolph

    Ted Randolph

    President

  • Tom Bratton

    Tom Bratton

    Executive VP Geosciences

  • Jeff S. Jordan

    Jeff S. Jordan

    Senior VP Engineering

  • John T. Harkrider

    John T. Harkrider

    CFO

  • Justin G. Clark

    Justin G. Clark

    VP Operations

  • Kevin Shaw

    Kevin Shaw

    VP Engineering

  • Joel Byersdorfer

    Joel Byersdorfer

    VP GeoEngineering

  • Mike Soroka

    Mike Soroka

    VP Reservoir Engineering

  • Paul Heuermann

    Paul Heuermann

    Senior Business Development Manager

  • Janice Gregory-Sloan

    Janice Gregory-Sloan

    Senior Business Development Manager

  • Bill Scanlan

    Bill Scanlan

    Senior Business Development Manager

  • Jamie Elkington

    Jamie Elkington

    Business Development Manager

  • Todd Kaul

    Todd Kaul

    Business Development Manager

John Harkrider

John Harkrider

Director
jd.harkrider@apexpe.com

John Harkrider was with Integrated Petroleum Technology and Texaco prior to APEX. Throughout his career, he has been heavily involved in the stimulation of Oil & Gas wells of all varieties. Additionally, he has been instrumental in the development of real-time fracture simulators and on-site techniques. John has authored over twenty-five technical papers and articles and has taught over thirty industry schools. John holds a Bachelor of Science Degree in Petroleum Engineering from the Colorado School of Mines.

Bill Anthony

Bill Anthony

Director
b.anthony@apexpe.com

Bill Anthony has extensive experience in the petroleum industry including completions/workovers, reservoir engineering, production engineering and field operations. Bill's expertise extends to basically every basin in the United States as well as numerous international locations. Bill was instrumental in the early development of Haynesville Formation completions which carried over to the Eagle Ford Formation during its discovery. These techniques have formed the basis of all current unconventional horizontal well completions. Prior to APEX Bill was with Integrated Petroleum Technology and the Western Company of North America. Bill holds a Bachelor of Science Degree in Geology and an Associate of Science Degree in Petroleum Engineering from Louisiana Tech University.

Mitch Kniffen

Mitch Kniffin

Director
m.kniffin@apexpe.com

Mitch Kniffin has extensive experience in oilfield engineering, management and business development. He has a thorough knowledge of drilling, workover, completions, geologic and geophysical disciplines of the oil and gas industry. Mitch was instrumental in building APEX HiPoint's microseismic business primarily related to engineering interpretation. Mitch holds two patents in horizontal well completions. Prior to APEX, he was with Schlumberger. Mitch holds a Bachelor of Science degree in Chemistry from Kansas State University.

Tom Bratton

Tom Bratton

Executive VP Geosciences
t.bratton@apexpe.com

Dr. Tom Bratton is Executive Vice President of Geosciences at APEX Petroleum Engineering in Denver Colorado. He leads a team of geoscientists and engineers in building state-of-the-art earth models used in solving engineering challenges while increasing production and ultimate recovery. He has 42 years' experience in the oil industry and is a recognized expert in geophysics, geomechanics, and petrophysics.

Dr. Bratton retired as a scientific advisor to senior management after completing a 36-year career with Schlumberger. He entered the industry as a wireline logging engineer working all the basins in the western United States. During his tenure with Schlumberger, he worked every corner of the world and led Schlumberger's technical communities on a global scale. He was awarded the Performed by Schlumberger Award in Completion Engineering (2008), the Henri Doll Award for Technical Innovation in Petrophysics (2007), SEG Best Paper Award in Geophysics, honorable mention (2007), Performed by Schlumberger Award in Geomechanics (2006), Interpretation Metier Achievement Award in Drilling Engineering (2002), and SPWLA Distinguished Speaker in Geology (2000).

After retiring from Schlumberger, Dr. Bratton worked two years as a Visiting Professor and Research Associate in the Petroleum Engineering Department at Colorado School of Mines (CSM). He then reentered industry working for Sigma Cubed and building geoscience models to solve engineering problems.

Dr. Bratton has a BS degree in Physics from Nebraska Wesleyan University, an MS degree in experimental atomic physics from Kansas State University, and a Ph.D. in Geophysics from Colorado School of Mines. He is a licensed Geophysicist with the Texas Board of Professional Geoscientists. Tom is a full member of the Society of Petroleum Engineers (SPE), Society of Petrophysicists and Well Log Analysts (SPWLA), Society of Exploration Geophysicists (SEG), European Association of Geoscientists and Engineers (EAGE), and the American Rock Mechanics Association (ARMA).

Dr. Bratton believes in diligence, integrity, and ingenuity. The more complex the problem, the more these qualities are required. Outside of work, Tom enjoys hiking the mountains of Colorado. He volunteers as an instructor for the Colorado Mountain Club teaching their Wilderness Trekking School.

Ted Randolph

Ted Randolph

President
t.randolph@apexpe.com

Ted is a petroleum engineer with over 25 years of experience. He has designed, implemented, and evaluated hydraulic fracture treatments in California, Colorado, Wyoming, Utah, New Mexico, Arizona, Montana, Texas, North Dakota, Oklahoma, Louisiana, Arkansas, Mississippi, Pennsylvania, Argentina, Hungary, Poland Russia, and China. Ted was involved in the very first Vaca Muerta wells in Neuquen Basin of Argentina as well as some of the first Haynesville completions. He has been involved in the design, execution, and evaluation of many of the unconventional resource stimulations in the world.

Ted worked started his career with The Western Company as a field engineer in the San Juan Basin of New Mexico/Colorado where the focus was Coal Bed Methane stimulation and cementing services. As he was promoted within Western, he was a technical sales representative and in-house engineer where the focus was broadened to include low perm, tight gas reservoirs.

After leaving The Western Company (BJ Services), Ted worked for Schlumberger as a sales engineer, district engineer, and in-house engineer. This work was focused on cementing, stimulation, and coil tubing services. Ted's primary focus was the Rocky Mountain region with some exposure to Oklahoma and Kansas reservoirs. He learned the benefit of integrating multiple service lines to determine a better answer for the client. It was during his time at Schlumberger that Ted helped develop 9.5 ppg completion cement slurries.

Ted also worked for NCS Multistage as the Frac Engineering Manager. This experience allowed him to gain unique insights into fracture stimulation treatments as bottomhole pressure/temperature gauges were deployed during stimulation treatments that used the NCS system.

Ted has held several positions with APEX Petroleum Engineering. He started as a Frac Engineer and has been promoted to Operations Manager, on to Vice President of Engineering and President. During his time at APEX, Ted has been involved in hydraulic fracturing treatment design, execution, and evaluation ranging from vertical tight gas wells to unconventional horizontal wells. This experience domestically was from California to Pennsylvania and North Dakota to Mississippi across most of the major basins. Internationally, the experience was in Argentina, Hungary, Poland, Russia and China.

He holds a Bachelor's of Science Degree in Petroleum Engineering from New Mexico Tech, Socorro, NM.

Jeff S. Jordan

Jeff S. Jordan

Senior VP Engineering - Operations
js.jordan@apexpe.com

Mr. Jeff S. Jordan is a versatile petroleum engineer with 39 years of experience and a demonstrated pattern of accomplishment. He has widespread experience in the petroleum industry including drilling, completion/workovers, hydraulic fracture stimulation, acid stimulation, reservoir engineering, facilities/production engineering and field operations. Mr. Jordan received a Bachelor of Science degree with Special Distinction in Petroleum Engineering from the University of Oklahoma in 1980. He is a registered Professional Petroleum Engineer in Louisiana, Colorado, and California.

Mr. Jordan worked for Chevron USA as a Drilling Engineer, and later as a Reservoir Engineer in the 1980s for Chevron's operations in the Rocky Mountain, Mid-Continent, and Western Regions. He then worked as a petroleum engineer for several oil & gas operating companies in California, Texas, and Colorado before becoming a petroleum engineering consultant in the late 1990s. Mr. Jordan performed drilling and completions engineering services as a consultant in Algeria (Ghadames Basin) and Venezuela (Orinoco Basin) as well as multiple basins in the USA. In 1999, he founded APEX Petroleum Engineering with 3 partners and helped build it into an internationally recognized petroleum engineering firm.

Mr. Jordan has performed drilling engineering, completion engineering, well intervention engineering, and operations engineering services for various clients in USA, Bahrain, Kuwait, Qatar, Oman, Russia, Australia, Spain, and Bolivia. Domestically he has drilled and completed wells in California, Colorado, Wyoming, Utah, New Mexico, Montana, North Dakota, Texas, Oklahoma, and Louisiana. His offshore experience includes work in the GOM (USA) and the Persian Gulf (Qatar).

Mr. Jordan has extensive experience in hydraulic fracture stimulation of shale reservoirs in both domestic and international locations. His experience includes work with deep, tight, high pressure, high temperature, and high H2S wells. He has drilled and completed extended reach horizontal wells and multi-lateral wells with multi-stage fracture stimulations in multiple US shale plays (Haynesville, Eagle Ford, Permian, Bakken, Marcellus, Monterey, Woodford, etc.).

Mr. Jordan is active in the Society of Petroleum Engineers (SPE), having served as SPE Denver Section Chairperson in 2003-2004 and was the SPE Rocky Mountain Petroleum Technology Conference Chair in 2006.

John T. Harkrider

John T. Harkrider

CFO

jt.harkrider@apexpe.com

John T. Harkrider, CFO, has over 30 years of operational and financial management experience in entrepreneurial operating companies and private equity/hedge fund management. In addition to responsibilities for financial reporting and business forecasting/planning and implementation, John will oversee human resource functions and external administrative relationships.

Mr. Harkrider has been the Chief Operating Officer and Chief Compliance Officer for BlackGold Capital Management LP (an affiliate of KKR & Co.), an energy-focused credit hedge fund managing up to $2b AUM. He was responsible for firm operations, maintaining third-party service provider relationships as well as general legal and compliance functions. He was also a member of the Risk and Valuation Committees. Prior to BlackGold, he was a Managing Director and Chief Financial Officer at Kenmont Capital and Kenmont Investments, a $500 million credit hedge fund focused on the energy, power and transportation sectors. In addition to managing the business operations of the firm, he was also responsible for general legal and compliance, financial reporting, investor relations and the due diligence and monitoring of private equity funds. Mr. Harkrider had previously been the President of a subsidiary operating company of then publicly traded Consolidated Graphics, Inc. where he was responsible for stabilizing and turning around the distressed acquisition. He has been a Regional Controller for Hines Interests Limited Partnership, a fully integrated international real estate investment and management firm, and he began his career Arthur Andersen LLP in the Financial Services Division. He is a CPA and received a B.B.A. degree in Accounting from Stephen F. Austin State University.

Kevin Shaw

Kevin Shaw

VP Engineering
k.shaw@apexpe.com

Mr. Kevin Shaw is Vice President of Engineering at APEX Petroleum Engineering in Denver, CO. He leads office based engineering projects ranging from small single well fracture designs to full field studies. He has 9 years of experience in the oilfield with a primary focus in hydraulic fracture stimulation.

Mr. Shaw started his career as an Associate Technical Professional (Field Engineer) for Halliburton in the Williston Basin. After that, he worked on the operator side for Koch Exploration as an Operations/Compliance Engineer, learning about the day to day operations of managing gas fields across Colorado, Utah, and Wyoming.

Mr. Shaw joined APEX in 2013 (formerly Sigma Cubed) as an on-site Stimulation Engineer. He has monitored frac jobs across the United States from California to Pennsylvania, as well as internationally in Russia.

Mr. Shaw has a BS Degree in Chemical Engineering from Colorado School of Mines. He is a full member of the Society of Petroleum Engineers (SPE).

Justin G. Clark

Justin G. Clark

VP Operations
j.clark@apexpe.com

Justin G. Clark is Vice President of Operations at APEX Petroleum Engineering based out of Denver, CO. He leads the field engineering division and works to implement hydraulic fracture designs and improve onsite efficiency and overall well completions. He has worked in hydraulic fracturing discipline for over a decade with exposure to vertical and horizontal wells in several basins and formations throughout the United States.

Justin started his career working for Halliburton Energy Services as a Technical Professional (Field Engineer) in the Permian Basin in 2007 and joined APEX Petroleum Engineering in 2010 (becoming SIGMA³ Integrated Reservoir Solutions in 2012).

Mr. Clark holds two BS degrees in Biology & Physical Anthropology from Iowa State University and is currently accepted at the University of North Dakota in Petroleum Engineering and a full member of the Society of Petroleum Engineers (SPE).

Joel Byersdorfer

Joel Byersdorfer

VP GeoEngineering
j.byersdorfer@apexpe.com

Joel is Vice President GeoEngineering at APEX Petroleum Engineering in Denver, CO. He supervises and executes petrophysics, geomechanics, and seismically-driven workflows. Joel has 12 years of experience in the oilfield.

He began his career on a Schlumberger wireline truck in Vernal, UT. After logging wells in the Piceance and Uintah Basins, Joel transferred to Denver to interpret borehole images. As a borehole geologist, he focused on understanding the distribution of natural fractures, stratigraphy, and the stress state in the borehole. Subsequently, Joel led the geomechanics group in Denver, primarily providing drilling solutions and inputs into hydraulic fracturing models. He has worked in every unconventional basin in the United States and several areas internationally.

Joel joined APEX (formerly Sigma Cubed) in 2016 as a geoscientist, later being promoted to GeoEngineering Project Manager, and is currently Vice President GeoEngineering. During his time at APEX Joel has been responsible for a wide range of tasks including supervising reservoir characterization projects, interpreting image logs, constructing petrophysical models, calculating geomechanical properties, and generating business proposals and pricing.

He holds a combined BA in Geology & Physics from Whitman College and an MS in Earth Science from Dartmouth College.

Mike Soroka

Mike Soroka

VP Reservoir Engineering
m.soroka@apexpe.com

Mr. Soroka is a highly experienced reservoir engineer with a career focus on reservoir simulation and field surveillance. He received his Bachelor of Science Degree in Mechanical Engineering from Colorado State University in 2008 and his Masters in Petroleum Engineering from the University of Adelaide in 2009. He has worked globally in a variety of environments including with research labs, operators, and service companies.

In these positions, Mr. Soroka has specialized in advanced field studies and project development. Projects have included extensive hydraulic fracture modeling, CO2 storage, CO2 EOR, hydrocarbon injection, N2 injection, LoSal, WAG schemes, and geomechanical coupling. He has experience across numerous software platforms such as FIELDPRO, ECLIPSE, FrontSIM, CMG, TOUGH2, and VIP. Along with extensive simulation experience, he has also been involved in numerous classical reservoir engineering campaigns such as PVT, SCAL, and PTA design, acquisition, and analysis.

Mr. Soroka is Vice President of Reservoir Engineering for APEX Petroleum Engineering. He leads the reservoir team in simulation-driven reservoir and fracture studies, design optimization, well spacing, and production forecasting.

Paul Heuermann

Paul Heuermann

Senior Business Development Manager
p.heuermann@apexpe.com

Paul is a Senior Technical Marketing and Sales Professional with over 40 years' experience equally split between the technical side of applying technology to finding oil and gas and the commercial side of representing technology to oil and gas companies. He is highly experienced in both domestic and international operations management with an extensive network of professional contacts. He has specific experience in strategic product marketing, revenue program development, service delivery, and key account business development.

Before joining APEX Petroleum Engineering, Paul spent 25 years with Halliburton Landmark in a variety of technical and business roles. His most recent assignment was Global Director of Business Development for seismic processing and depth imaging technologies. Prior to Haliburton he was VP of Sales and Marketing for Advance Geophysical Corporation, a very successful geophysical software startup company in Denver CO. Before Advance he served as a geophysicist with Marathon Oil Petroleum Technology Center and Phillips Petroleum Company. He received his Bachelor of Science degree in geophysics from Kansas State University in 1979.

Janice Gregory-Sloan

Janice Gregory-Sloan

Senior Business Development Manager

j.gregorysloan@apexpe.com

Janice has over 30 years of diverse experience in the Oil and Gas industry, following her graduation from the University of New Orleans with an M.S. in Geology. Her experience ranges from working as a petroleum geologist finding oil and gas, working in oilfield services to promote the use of technology to find oil and gas and now selling integrated geoscience and engineering services to companies to support their asset development. During her career, Janice worked for Amoco Production Company, WesternGeco, Schlumberger SIS, Schlumberger Data and Consulting Services, Schlumberger Well Services, Schlumberger Wireline and APEX Petroleum Engineering. In her last role at Schlumberger, she was the Sales Manager for Microseismic and Borehole Seismic for North America. She is currently in a business development role at APEX Petroleum Engineering.

Bill Scanlan

Bill Scanlan

Senior Business Development Manager

b.scanlan@apexpe.com

Bill has worked within the Oil and Gas service industry for over thirty years post-graduation from the University of Kansas with a Civil Engineering degree. Over his career he has worked for Schlumberger, Reeves Wireline, NuTech Energy Alliance, RockPile Energy Services, Keane Group and APEX with a background in Field Operations, Sales, Engineering and R&D. In his role as Senior Business Development Manager, Bill acts as a liaison for Engineering within APEX to our clients. Bill has been published multiple times in technical papers and has two inventions patented under his name.

Todd Kaul

Todd Kaul

Business Development Manager

t.kaul@apexpe.com

Todd has over 36 years of experience in the oil & gas industry. Including 10 years as a pumping services engineer & 26 years in various positions of increasing responsibility with proppant companies. During this time he held positions ranging from Field Engineer to Director of Western Hemisphere Sales/ Marketing & Operations. He has completions & logistics experience in basins throughout the U.S. as well as Canada, Latin America and South America. A co-author of multiple SPE papers, Todd earned his B.S. degree in Geological Engineering from S.D. School of Mines & Technology and has advanced studies in Mechanical & Industrial Engineering.

Jamie Elkington

Jamie Elkington

Business Development Manager

j.elkington@apexpe.com

Jamie has over 15 years' experience in oil and gas operations. She has a petroleum engineering degree from Texas Tech University, with a background in production and completion operations. Jamie is based in Houston, Texas. She manages customer interface, ensuring all client needs are understood and appropriately addressed. She works closely with the entire management team to support comprehensive communication.

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