Leadership & Management Team

InterAct's senior leadership team has a wide a range of expertise and experience in the Engineering and Environmental Consulting areas.
  • Val Lerma

    Val LermaSr. Engineering Advisor

    Ms. Lerma has worked in the oil industry for over 30 years. Her experience includes drilling, reservoir, and production engineering, as well as management. She has worked for both major and independent operators, both on and offshore. She has a BS and MS in Petroleum Engineering from the University of Southern California, and an MBA from California Lutheran University. She served as the Engineering Manager, Business Development Manager, and President of Orchard Petroleum Inc., and Orchard E&P, LLC. Ms. Lerma taught the drilling engineering undergraduate and graduate course at USC for 7 years, and currently teaches various oil and gas classes for both the PTTC and EUCI. Ms. Lerma is on the Curriculum Advisory Board for the University of North Dakota's petroleum engineering department, and is a member of the local API Board. Val has authored and co-authored several SPE papers and is a licensed professional petroleum engineer in the State of California.

  • Harry Barnum

    Harry BarnumPrincipal Consultant / Regulatory Manager

    A respected and licensed California Professional Geologist, Harry Barnum has over 30 years of experience in the oil and gas industry. He has managed all aspects of oil field development, including reservoir analysis, drilling and facility optimization, waterflood and steamflood injection program design, property valuation, regulatory and safety compliance, training, mapping and field engineering. He has managed both onshore and offshore oil production facilities and has written and implemented spill response programs during his tenure. He has provided scientific and operational support to a local water purification and desalinization company that reclaims oilfield produced water and impacted groundwater. Harry has also completed environmental assessments and managed numerous remediation programs gaining regulatory site closure in CA. He currently serves on the Board of the API Coastal Chapter.

  • Diane Mandrafina

    Diane MandrafinaFinancial Controller

    Ms. Mandrafina has a Degree in Accounting and an MBA from Long Island University, with many years of experience managing multi-million dollar budgets in Finance Executive and Controller roles in public higher education as well as corporate environments.

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