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Our Staff

Pterra is comprised of a committed and dedicated group of professionals. Each of our principals have extensive experience in the power industry and have leading technical roles in their fields of specialization in electric power. In addition. Pterra staffs projects with capable technical personnel of proven skills and commitment.

Ric Austria

Executive Principal, Pterra founder

Mr. Austria is a founder of Pterra, LLC. He has over 35 years’ experience in electric power transmission planning, operations, voltage simulation and analysis, design and engineering, and brings this knowledge to help clients worldwide in the power industry. He is a renowned expert in the specialized fields of system reliability, transmission and distribution planning, integration of new technologies and system analysis. …

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Ramon Tapia

Managing Principal, Pterra founder

Mr. Tapia is a founding member of Pterra, LLC. He has 37 years of experience in transmission planning and operations. He has led and conducted transmission and distribution studies nationwide and overseas to assist Transmission/Distribution Owners and ISOs/DSOs to develop sound solutions for the planning and operation of their power systems. ….

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Ketut Dartawan

Managing Principal, Pterra Founder

Ketut Dartawan is Cofounder and Managing Principal of Pterra Consulting. He has 25 years of experience in electric power system, where he is engaged in research projects and a wide range of system studies in transmission, distribution, and interconnection of distributed energy resources (DER). He has helped clients to connect more than 1,000 MW of renewable energy and over 5,000 MW of nuclear, combined cycle power plants, …

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Dr. Moises Gutierrez

Principal Consultant, Pterra Founder

Dr. Gutierrez is a founder of Pterra, LLC and has more than 40 years of experience which includes interconnection studies, transmission access studies, power system expansion studies, dynamic modeling, dynamic analysis of power systems, feasibility studies, substation layout studies, switching and lighting surge analysis, transformer and induction machine model reduction, software model development, and teaching engineering and software courses. …

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Mario Infantado

Senior Consultant, Pterra Partner

Mr. Infantado is a partner of Pterra, LLC who has over 25 years of experience in electric power system studies and operations. He has been involved in transmission and distribution studies for transmission and generation interconnection projects, conducting load flow analysis, dynamic stability simulation, short circuit analysis, harmonics analysis, and thermal and voltage transfer analyses to analyze operating limits and transfer capabilities of existing power grids. …

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Thomas Gandrud

Power System Consultant

Thomas Gandrud is a Power System Consultant with Pterra Consulting. He holds a master’s degree in Electrical Engineering from the University of Minnesota and has knowledge of a wide variety of power system topics including, but not limited to, power flow methods, contingency analysis, wind turbine operation, photovoltaics, and switch-mode power electronics. …

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Cherry Mae Bautista

Power System Consultant

Ms. Bautista is a Power System Consultant who has engaged in different projects involving analytical studies mostly for the transmission and distribution planning sector. She is experienced with varied transmission studies including, but not limited to, network studies, site technical assessment, and interconnection studies for new generation, transmission systems or power system expansion …

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Anthony Austria


Mr. Austria has been with Pterra since 2007 as a student intern, junior engineer and now Consultant. His areas of expertise include power flow, transfer analysis and transient modeling, and has applied his skills to studies involving the integration of new generation, primarily solar and wind, as well as the transmission studies of large interconnected networks. His recent work involved power exchange capacities among South Asian countries of India, Bangladesh, Sri Lanka, Bhutan and Nepal, as well as between the various Indian states. He has also been active in studies of transient and temporary overvoltages and voltage flicker of solar inverters….

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Aldrin Reyes

Power System Consultant

Aldrin Reyes is a Power System Consultant with Pterra Philippines Inc. He has performed and participated in several studies for generator interconnection, generator siting, system stability, and transmission planning. …

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More of Our Team:

  • Wit Lastiani
  • Claudett Padilla
  • Carolyn Steuhl
  • Ryan Villajuan
  • Hannah Infantado
  • Andrew Austria
  • Mariz Ponce
  • Carla Sajines Padilla
  • Dana Infantado

For a full summary of our resources available for specific needs, please contact us at

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