Team Members

//Team Members
Team Members 2018-10-01T13:30:49+00:00

Team Members

Cliff Herbst, P.E.
Executive Director, Mahwah, New Jersey

About Cliff

Mr. Herbst is a Professional Engineer with over 32 years experience in project management, project engineering, and general management of plant operations and maintenance, as well as, piping, mechanical and electrical systems projects. He directed the economic, reliable, and safe operation of a five unit, 500 MW, coal, oil and natural gas-fired, electric generating facility, including all administrative, engineering, operations and maintenance functions. Mr. Herbst has held supervisory positions in overhaul planning and plant maintenance, as well as, support engineering services.

He has provided project engineering services for a major E&C company, an electric and gas utility, a mechanical contractor, and engineering consultants. Mr. Herbst has a B.S. in Mechanical Engineering from Stevens Institute of Technology.

Andy Hixson
Executive Director, Denver, Colorado

About Andy

Andy Hixson is a chemical engineer with more than 12 years of experience in environmental services, including air permitting, air dispersion modeling, health risk analysis, and with compliance assistance, auditing, and training.  His experience also includes project finance and development activities such as site acquisitions, contract negotiations, permit applications, and pro forma development.

At E3, he has provided technical assistance and review on more than sixty facilities, both new construction and existing assets ranging in size from less than 10 MW to larger than 600 MW.  These projects include coal fired generation, natural gas peakers, combined cycle combustion turbines, biomass fired generation, waste to energy, landfill gas to energy, solar power, and wind turbines.  Typical tasks include evaluating potential risks associated with environmental compliance and advising clients on a project’s ability to maintain compliance within a specified budget.  Mr. Hixson has a B.S. in Chemical Engineering from the Georgia Institute of Technology.

Carol Ho, P.E.
Senior Director, Denver, Colorado

About Carol

Ms. Ho is an environmental engineer with more than 16 years of diverse experience in evaluating all aspects of environmental requirements associated with energy projects.  Ms. Ho focuses on environmental risk assessment and permitting compliance issues.  Her reviews of projects include all aspects of local, state and federal level environmental permitting and regulatory compliance.  Her work includes reviews of permit conditions and technical compliance issues at a variety of facilities, including renewable and traditional power plants, pipeline routes, and transmission projects. The investigations typically require independent research, documentation requests, and discussions with the local, state or federal agency, reviewing the applicable regulations, permit conditions, notices of violation and compliance orders.  Her experience in navigating permitting requirements provides clients with valuable guidance in interpreting common regulatory issues and maintaining compliance.  Ms. Ho has a B.S. in environmental engineering from the University of Guelph, located in Ontario, and is a registered environmental engineer in the State of Colorado.

Lori Kepner
Senior Director, Denver, Colorado

About Lori

Lori Kepner has over 18 years of senior-level experience in the energy industry, negotiating and securing profitable non-recourse financing for major domestic and international clients in the energy and natural gas infrastructure, IPP, and integrated utility sectors.  Her expertise includes identification of new market opportunities, relationship management and transactional due diligence across the traditional thermal, renewable, transmission and energy distribution industries.    

Ms. Kepner brings qualitative and transactional skills in financial and credit analysis, debt and equity cash flow modeling, loan documentation and risk analysis to E3 Consulting and its clients, linking the commercial and technical segments within the team.  She earned an M.B.A. with an emphasis in finance from the University of Denver and a B.S. in Geology from the University of Utah. 

Galyn Land
Executive Director, Denver, Colorado

About Galyn

Galyn Land is a project and construction management professional.  Since 1989, Mr. Land has performed due diligence reviews on over 400 project financings encompassing: natural gas storage projects, petroleum and chemical refineries, natural gas pipelines, air pollution control projects, solid fuel (coal, wood, and refuse) power plants, gas/oil fired power plants in both combined and simple cycle configuration, coal gasification, and biofuel facilities. He has reviewed project and construction issues related to contracts, constructability, project and construction costs, and schedules. Mr. Land has also provided construction- monitoring services on various types of facilities in North America. He has a B.S. in construction management from Colorado State University.

Joe Mendez
Executive Director, Houston, Texas

About Joe

Mr. Mendez has 31 years in the energy industry identifying and capturing value in markets and from assets. He has extensive experience in pro forma development, asset development, project management, financial restructuring, financial and turn around market analysis, power marketing, negotiations, contracts, international projects, acquisitions, and due diligence. He has a M.B.A. from the University of Texas, a J.D. from UCLA School of Law, and a B.S. in Civil Engineering from Texas A&M University.

Mike O’Dell, P.E.
Executive Director, Denver, Colorado

About Mike

Mr. O’Dell has more than 20 years experience in the power industry. As an independent engineer, Mike identifies project’s potential technical and operational risks as part of the due diligence process.  He has provided technical reviews on a variety of technologies, including solar power thermal stations; flash and binary geothermal facilities; coal-fired generation stations, waste energy facilities; and combustion turbine facilities. He advises clients on financial and technical due diligence, asset management, and project management activities. Prior to joining E3, he was a senior project manager for SAIC Energy, Environmental, and Infrastructure, LLC (formerly R.W. Beck), where he was responsible for managing and performing independent engineering reviews to support project financings.  Mike has both a B.S. and a M.S. degree in mechanical engineering from the University of Missouri at Rolla and is a registered professional engineer.

Paul Paxson
Executive Director, Denver, Colorado

About Paul

Mr. Paxson comes to E3 with 34 years of operational and consulting experience in the energy generation industry. Having worked on over 160 generating projects, he has a proven background across a variety of technologies including PV solar, CSP, wind, combustion turbines, steam turbines, biomass, reciprocating engines, biofuels and landfill gas applications. Mr. Paxson also has deep consulting experience related to plant life-cycle matters including O&M costs, major maintenance and life extension costs. Prior to joining E3, Mr. Paxson was employed as an independent engineer and management consultant. He also worked for more than a decade with the Kinder Morgan Power Company as an asset and power plant programs manager. Mr. Paxson is a nine-year veteran of the U.S. Naval Nuclear Power Program, where he served at the Naval Reactors Facility in the Idaho desert as an instructor and also onboard the USS Michigan where he completed six deterrent patrols. In addition, he has completed substantial coursework in mechanical engineering, business, and economics.

John Purcell, P.E.
Executive Director

About John

John Purcell has managed domestic and international power projects for architects, engineers, constructors, and owners for more than 35 years. His 20 years of nuclear experience includes six years on the senior site PWR management team where he managed projects and programs consisting of integrated engineering, design subcontractors, construction contractors, owner QA, and owner start-up teams. Mr. Purcell’s extensive EPC project management experience includes gas-fired combustion turbine, geothermal, woody biomass, hydroelectric, and natural gas liquid plants. His project team was awarded ‘Project of the Year’ for the Machala Power Project, a 130 MW natural gas simple cycle plant located in Ecuador, South America, which also achieved early operation. At present, Mr. Purcell serves as the on the Independent Monitoring team monitoring the Donald C. Cook Nuclear Plant’s multi-year Life Cycle Management Program. He is a licensed professional engineer with a B.S. in Mechanical Engineering from Lowell Technological Institute and a M.B.A., University of Pittsburgh.

Albert Rettenmaier
Executive Director, Denver, Colorado

About Albert

Albert “Al” Rettenmaier has 30 years of experience as an energy executive in the renewable energy, gasification, power generation, oil & gas and chemicals industries. He has managed engineering and construction for capital-intensive projects and has an in-depth understanding of how to develop and successfully implement large capital projects. His expertise in front-end project development is key to getting projects through final investment decision and to financial close.

His experience in R&D, projects, operations, and startup companies enables him to assist clients on matters of technology, project contracting strategy and execution, due diligence, creditor advisory, and other services pertaining to project financing. He has a B.S. in chemical engineering from the University of Kansas.

Vince Tummarello
Managing Director, Mahwah, New Jersey

About Vince

Mr. Tummarello has more than 38 years of experience in power generation and electric transmission systems. As a managing director with E3, Mr. Tummarello oversees the management of E3’s New York-based office. In addition, he has both participated in and led a number of E3 projects involving technical, commercial, and regulatory aspects of power plant due diligence investigations, bio-mass project advisory services, and advisory services on operating power plants and district heating/cooling systems.

He has significant experience in operations and maintenance, power plant engineering, fuel procurement, power marketing and environmental compliance. Prior to joining E3 Consulting, he served as the Division Vice President for Orange and Rockland Utilities, Inc., Mr. Tummarello was responsible for the electric generation business unit, including all plant operations and maintenance activities, and the associated engineering, construction, fuel purchasing, power marketing and environmental compliance activities. As a consultant, he has performed a large number of O&M reviews for clients, and has provided detailed feasibility studies for on-site generation applications for municipal, commercial and industrial energy consumers. Mr. Tummarello has a M.B.A. from New York University and a B.S., in Mechanical Engineering from Rensselaer Polytechnic Institute.