Team Members

Due Diligence & Technical Services

Andy Hixson
Executive Director

Mr. Hixson serves as E3’s practice lead for solar projects. He is a chemical engineer who specializes in project finance and development activities such as site acquisitions, contract negotiations, permit applications, and pro forma development. His background also includes environmental services, including air permitting, air dispersion modeling, health risk analysis, compliance assistance, auditing, and training. His solar PV experience over the past four years includes the review of more than 100 individual projects totaling approximately 400 MW and three large solar portfolios totaling more than 7 GW. Mr. Hixson is an active member of industry trade groups including the Solar Energy Industries Association and the Colorado Solar and Storage Association.  Mr. Hixson has a M.S., Global Energy Management from the University of Colorado at Denver School of Business and a B.S. in Chemical Engineering from the Georgia Institute of Technology.


Carol Ho, P.E.
Senior Director

Carol Ho is an environmental engineer with diverse experience in evaluating all aspects of environmental requirements associated with energy projects, ranging from renewable energy and thermal projects to oil and gas engagements.  Ms. Ho focuses on environmental risk assessment and permitting compliance issues, including evaluation of the biological impacts and mitigation strategies associated with wind and solar farms.  Her evaluations of projects include all aspects of local, state and federal level environmental permitting, including current regulatory initiatives to streamline compliance with the Endangered Species Act, Bald and Golden Eagle Protection Act, and Migratory Bird Treaty Act.  Overall, her work typically includes independent research, documentation requests, reviewing the applicable regulations, permit conditions, Phase I Environmental Site Assessments, 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.

Galyn Land
Executive Director

Galyn Land is a project and construction management professional and head of E3’s Construction Management Practice. Mr. Land has performed due diligence reviews on over 500 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 also provides 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

Joe Mendez is E3’s Distressed Assets Practice Leader. He has extensive experience in the energy industry, allowing him to identify and capture value in markets and from assets.  His expertise lies in pro forma development, asset development, financial restructuring, financial and turnaround market analysis, power marketing, negotiations, contracts, international projects, acquisitions, and due diligence. 

Mr. Mendez has worked on numerous project restructuring as well as financings. His experience includes the range of technologies from natural gas and transmission projects to wind, solar and biomass projects. He has reviewed the key commercial agreements (including feedstock supply and power purchase agreements) and financial models to ensure that the technical and commercial assumptions were reasonably achievable.  As part of his work, Mr. Mendez typically reviews market forecast reports to ensure that their underlying operating characteristics are feasible and that cash flow forecasts are accurately depicted in the financial model. Mr. Mendez 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

Mike O’Dell advises clients on financial and technical due diligence, asset management, and project management activities. As an Independent Engineer, Mr. O’Dell identifies a project’s potential technical and operational risks as part of the due diligence process and is responsible for managing and performing reviews to support project financings.  He provides reviews on a variety of technologies, including wind and solar power projects; thermal stations; flash and binary geothermal facilities; waste energy facilities; and combustion turbine facilities. Prior to joining E3, he was a senior project manager for SAIC Energy, Environmental, and Infrastructure).  Mr. O’Dell 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.

John Purcell, P.E.
Executive Director

John Purcell is an E3 project manager and consultant who has managed a variety of domestic and international power projects, including significant experience with nuclear facilities. Mr. Purcell’s extensive EPC project management experience includes gas-fired combustion turbine, geothermal, woody biomass, hydroelectric, and natural gas liquid plants. Prior to joining E3, he spent 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. 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 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. from the University of Pittsburgh.

Albert Rettenmaier
Executive Director

Albert “Al” Rettenmaier is E3’s Oil, Gas, and Chemicals Practice Leader. He has extensive experience as an energy executive in the renewable energy, gasification, power generation, oil & gas and chemicals industries. Mr. Rettenmaier 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. Moreover, Mr. Rettenmaier’s 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.


Rajalakshmi Sundaramoorthy, Ph.D. Solar Resource Analyst

Rajalakshmi Sundaramoorthy (Raji Sundar) is a solar resource analyst and consultant for E3. Dr. Sundar brings to E3 a strong background in the renewable energy field, with more than a decade of experience in the solar industry. Prior to joining E3, Dr. Sundar was the team lead of the PV System Performance and Operations Group with the US-Photovoltaic Manufacturing Consortium in Albany, New York. The Consortium was partially funded by the U.S. Department of Energy’s Sun-Shot Initiative. Dr. Sundar did her postdoctoral studies with the National Renewable Energy Lab (NREL), analyzing and testing copper indium gallium diselenide (CIGS) thin-film photovoltaic cells. She holds a doctorate in Advanced Physics and a M.S. in Physics from the University of Texas.

Vince Tummarello
Managing Director

Mr. Tummarello has extensive experience in power generation and electric transmission systems. As a managing director with E3 and E3’s Transmission Practice Lead, 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.