Team Members

Due Diligence & Technical Services


Jeremiah Carroll
Project Manager – Solar

Mr. Carroll utilizes 12 years of renewables experience to support teams through project planning, procurement, construction, and commissioning. Jeremiah has extensive experience providing value engineering due diligence on the front end of solar projects to optimize construction sequencing and maximize procurement scopes. Highly experienced in monitoring construction quality, Mr. Carroll leverages in the field experience to maximize budget and minimize schedule impact. With years of O&M troubleshooting and technical service, he brings to the table a deep understanding of project commissioning, testing, and SCADA configuration. Mr. Carroll holds a NABCEP Installation Professional license and has supported on the long-term operation and production monitoring of hundreds of megawatts of solar assets.

Jeremiah Carroll, E3 Consulting

Matthew Dannemann, P.E.
Solar Analyst

Matthew Dannemann has five years of experience in commercial development and engineering with an emphasis on site development and civil engineering design while assisting in the preparation and permitting of land development plans for commercial clients nationwide. He joins E3 from CenterPoint Engineering, where he was the program manager of preliminary engineering for rapidly expanding commercial clients. Through Mr. Dannemann’s experience seeing hundreds of projects, he has a strong knowledge of the potential and unforeseen issues. More specifically, Mr. Dannemann has seen the various issues certain sites can encounter and how to solve them. In addition to commercial development, Mr. Dannemann has supported the development of solar projects throughout Colorado, providing site due diligence, solar site layout design, and overall civil engineering support for commercial and industry solar projects. Mr. Dannemann previously worked as an engineering intern for the Colorado E470 Highway Authority and before that as an on-site project engineer intern building the Smart Financial Centre for Linbeck Group in Houston, Texas.

Mr. Dannemann graduated with a B.S. in Civil Engineering, Cum Laude from the Auburn University in Auburn, Alabama. Mr. Dannemann is a well-rounded engineer, as he also received minors in finance and business from Auburn and is a licensed professional engineer in the state of Colorado.


Jason Han
Owner’s Engineer – Energy Storage

Jason Han joins E3 from Arizona Public Service (APS), Arizona’s largest utility, where he served as a Technology Assessment Engineer. Prior to that role, Mr. Han served as a Transmission & Distribution Engineer with APS.  In his latter role, Mr. Han led the development of APS’s company-wide technology evaluation process providing for a standardized evaluation document, technology readiness criteria and development of the technology’s value proposition. He also served as a subject matter expert on battery systems for emerging storage technology, safety standards and energy storage strategies and was involved in evaluating the integration of novel grid technologies and products – such as super
capacitors, flow batteries, zero-emission gen sets and more –  into APS. Prior to his tenure with APS, Mr. Han was involved in the construction and commissioning of Mesquite Solar 2&3, developed by Sempra Generation, which were among the first utility-scale solar projects built in the United States.

Mr. Han’s rich experience and educational background will support his work with E3 Consulting where he will provide independent engineering and technical and commercial advisory services to our clients.  Mr. Han has a B.S.E in Electrical Engineering from Arizona State University and has earned his Engineer in Training Certification.


Carol Ho, P.E.
Executive Director – Environmental

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. She is pursuing a Master in Sustainability Leadership from Arizona State University.

Carol Ho, E3 Consulting

Ajinkya Joshi
Energy Manager – Solar

Ajinkya Joshi is an energy manager with E3 Consulting. He is responsible for conducting energy resource analysis, technical equipment due diligence, energy modeling, and reviewing performance testing provision and results. Mr. Joshi also offers development support related to integrated solar and battery energy storage system (BESS) projects to support project financing. 

Before joining E3, Mr. Joshi was a senior analyst – energy storage where he worked on a variety of PV and battery storage projects. He has lead execution of web-based energy modelling platform deployed on MS Azure and has modeled technical, economic, and performance parameters for solar and BESS projects. Mr. Joshi also worked for a leading solar PV developer in India where he has extensively used PVsyst for simulation and design of utility-scale solar PV farms. In this role he analyzed energy and meteorological data using Python and MS Excel for performance evaluation of assets. He also provided engineering design and optimization, estimates of losses, and root cause analyses to maximize energy yields, among other tasks.

Mr. Joshi has a master’s degree in Energy Systems Engineering from the Indian Institute of Technology Bombay and a bachelor’s degree in Electrical Engineering from the University of Mumbai. He is a lifelong learner who has taken several courses leading to certificates that have advanced his knowledge of the energy industry.


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.

Galyn Land, E3 Consulting


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.

John Purcell, E3 Consulting

Albert Rettenmaier
Executive Director – Hydrogen, Oil, Gas & Chemicals

Albert “Al” Rettenmaier is E3’s Hydrogen, Oil, Gas, and Chemicals Practice Leader. Mr. Rettenmaier has 35 years of Engineering, Construction, and Procurement (EPC) experience for capital-intensive projects. He has an in-depth understanding of how to develop and successfully implement large capital projects internationally and domestically. His expertise in front-end project development is key to getting projects through final investment decisions and to financial close. He is currently working on projects in Green Hydrogen, Green Ammonia, Biofuels, Carbon Capture & Sequestration, Compressed Air Energy Storage, Biodegradable Plastics, Low Carbon Concrete, Oil & Gas Midstream, Solar, and Wind Repowering. Al has a B.S. in Chemical Engineering from the University of Kansas.

Al Rettenmaier, E3 Consulting

Daniel Tarico
Project Manager – Solar

Mr. Tarico is a project manager supporting E3’s solar and energy storage practices. Dan brings 15 years of design, construction, and operations experience in utility solar power and the C&I solar market. His insights into renewable infrastructure projects are guided by his knowledge of Finance, Engineering, and Construction, his long tenure in the space, and the breadth of his experience and education. Before entering the solar industry, Mr. Tarico had held varied roles in technology development/industrial R&D and has nearly 25 years of total experience managing, working in, and continually improving construction projects of many types.

Complimentary to his power project experience, Mr. Tarico has unique expertise in the design, manufacturing and construction of solar trackers for utility solar power. He has worked as a designer, product manager, and program manager, specifically with utility solar trackers. In addition to helping evaluate equipment suitability for planned projects, he provides expert services for tracker design, value engineering, and failure analysis/corrective action plans.

Mr. Tarico holds an M.B.A. – Finance and International Management, M.S. – Materials Science, and B.S. in Metallurgical Engineering from the University of Arizona. He also holds qualifications as an A (Engineering Works) and B (Commercial) general contracting licensee.

Daniel Tarico, E3 Consulting

Terry Terezakis
Executive Director

Terry Terezakis is an E3 Executive Director who focuses on thermal power generation projects. He is an innovative problem solver and recognized subject matter expert in gas turbines yet has experience across the full range of thermal plant performance and operations. Applications include heavy-duty (frame) and aero-derivative gas turbines, diesels, combined cycle (steam turbine & gas turbine), and large thermal power plants (nuclear and fossil fueled). During his more than 30-year career, Mr. Terezakis has worked for GE, AES, Pratt & Whitney Power Systems, McHale & Associates, and Curtiss Wright Nuclear, among others.

Mr. Terezakis broad experience includes engineering and root cause based improvements in generating capacity, thermal efficiency, emissions performance, reliability, risk management, and cost reduction for OEM’s, aftermarket suppliers, and operators of new and existing electrical power generating stations. More recently, Mr. Terezakis has applied early anomaly detection programs to prevent operational failures and identify sources of efficiency loss in operating powerplants.

He has a B.S., Energy Engineering Technology, from The Rochester Institute of Technology, as well as an A.S. in Energy Systems Technology from SUNY College of Tech at Delhi. Moreover, he is a graduate of the GE Field Engineering Program and has participated in numerous industry training programs. He is also active in professional societies and development, having provided industry guidance for ASME Power Test Codes (PTC – 22 & 51) Committee for gas turbine testing and served on the Customer Advisory Board for Emerson Process.  Outside activities include serving as an Outside Director for Envirokinetics, a California-based design build firm specializing in process control equipment for gas turbine emissions and the petrochemical industries.


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.

Vince Tummarello, E3 Consulting