Our Experts
Oil and gas measurement uses physics, chemistry and thermodynamics, mechanical and chemical engineering, instrumentation and automation/control, modeling, and mathematics. It is inherently complex.
At the Letton Hall Group, we have all the right skill sets. We work collaboratively to resolve problems so you get the right expertise every time. That’s our strength. Together we’re measurably better.

Eric Toskey, M.S.
Chief Executive Officer |

Slavko Tosic
Chief Operating Officer
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Eric Kelner, P.E., M.S.
Chief Information Officer
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Winsor (Chip) Letton, Ph.D.
Director
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James Hall, Ph.D.
Director |
Amin Amin, M. Eng.
Chief Technology Officer |
Klaus Zanker,
Principal Advisor
Gas and Liquid Measurement
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Donald Day,
Principal Advisor Measurement Systems
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Thomas Hurstell, P.E.
Principal Advisor Measurement and Allocation
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Bob Webb, P.E.,
Principal Advisor
Measurement and Allocation
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Jefferson Creek, PhD,
Principal Advisor
Reservoir Fluids/Flow Assurance
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Christine Ehlig-Economides, PhD
Principal Advisor, Petroleum Reservoir and Production Engineering
Principal Advisor in Petroleum Reservoir and Production Engineering |

Peter Edlund
Principal Advisor, Midstream and Marketing |

Antonio Montes, PhD,
Senior Advisor
Flow Process Modeling
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Terry Blauser,
Senior Advisor
Instrumentation, Control, and Measurement
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Dennis Tierney,
Senior Advisor
Gas Measurement
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Douglas Hinkle,
Senior Advisor
Learning and Development
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Zeeshan Shaikh, M.S.
Engineer
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