Senior Leadership Team
The Senior Leadership team provides strategic guidance for nrg.
With decades of combined experience in energy and business, some senior leadership team members have been key participants in the renewable energy industry since its inception. Others bring diverse experience in sales, marketing, manufacturing, and human resources from other sectors.
As President of NRG, Evan Vogel is responsible for overseeing the company’s operations, providing strategic direction, and leading the executive management team. With more than 30 years of experience in power, energy, and renewables, he previously held positions at Ampt, Petra Solar, and Power-One. Before NRG, he was the Vice President of Marketing, Communications and CIB Engineering for Schneider Electric’s Solar and Energy Storage Business. While at Schneider Electric, Evan led the company’s transition from hardware focus to include a unique, cloud-connected SaaS platform that drove double-digit growth. He holds a B.S.E.E. degree from New York University and an MBA from Adelphi University.
Vice President, Global Sales
Greg Erdmann has over 33 years of technology sales and marketing experience in expanding international market share, sales revenues, and profits for both established and start-up companies. He has spent over 20 years in the renewable energy industry. Greg came to NRG from Southwest Windpower, where he served as Vice President for Commercial Sales and Global Marketing. He also spent two years directing the sales of radar systems at Vestas Technology R&D. He has a long track record of delivering strong financial results and maintaining key relationships with NRG's customers and technical partners. Greg holds a bachelor's degree in economics and art history from the University of Vermont.
Vice President, Operations
As Vice President for Operations, Thomas Hirschfeld oversees NRG Systems' manufacturing operations, integrated supply chain processes, and quality program. Thomas has over twenty years of global operations experience in a range of sectors, including industrial manufacturing, retail cannabis, and renewable energy. He previously held positions at Unimacts, High Fidelity, Inc., and Northern Power Systems.
Vice President, Finance
Ann Greenamyre joined NRG in 1995 as one of the company’s first accounting employees. During her tenure, Ann has been instrumental in defining and structuring the accounting and finance departments. She also implemented new processes and controls to effectively transition NRG from a private to a public company in 2017. Ann currently oversees the Finance and IT departments and leads all financial reporting, budgeting, and forecasting. Prior to joining NRG, she spent five years in the credit union industry in an administrative role. Ann holds a bachelor’s degree in business administration from Castleton University.
Vice President, Engineering
Michael Purdue brings more than 25 years of software, analytics, and technical leadership expertise to NRG, and spent nearly 18 of those years developing enterprise clinical and financial solutions serving millions of patients worldwide. He came to NRG in 2015 from GE Healthcare, where he was responsible for the technical leadership of the company's flagship enterprise clinical information system. As Vice President of Engineering at NRG, Mike is keen to lead his team in leveraging the power of data and software services, coupled with proven hardware technology, to offer complete digital solutions and technical support to the renewable energy industry. He holds bachelor's degrees in computer science, computer information systems, and business management, with a focus on economics and finance, from Norwich University.
Vice President, Marketing
As Vice President of Marketing, Leon Hailstones drives NRG’s marketing strategy and new product development. He has over a decade’s worth of international channel development, product management, and marketing experience in solar and microgrid technologies. Since joining NRG, Leon has been part of the company’s sales team, where he led the sales strategy for Bat Deterrent Systems, and the product management team, where he played a key role in driving the development of NRG Cloud. He previously served as a product manager with the global Schneider Electric Solar Business where he managed a range of power electronics, communications, and software products. Leon holds an MBA from Simon Fraser University in Vancouver, Canada.
Director of Human Resources
As NRG’s Director of Human Resources, Patti leads the company’s HR strategy and ensures its programs and initiatives are effective, efficient, and aligned with NRG’s mission and business objectives. Bringing over 30 years of HR experience with her to NRG, Patti previously held senior level positions at Leader Evaporator Co and Weidmann Electrical Technology. Patti holds SPHR and GPHR certifications from the Human Resources Certification Institute and a SHRM-SCP from the Society for Human Resources.