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Executive Team

Jon Guerster

Chief Executive Officer

As CEO of Groom Energy Solutions, Jon is responsible for strategy and overall operations. Prior to co-founding Groom Energy, Jon was a general partner at Charles River Ventures (CRV), a leading venture capital firm with $2 billion under management. At CRV, Jon was an active lead investor, board member or advisor for high profile software and service companies such as BeFree (acquired by ValueClick), eDocs (acquired by Siebel Systems), Vignette (VIGN), Virtusa (VRTU) and Xign Corporation (acquired by JP Morgan Chase).

As CEO of Groom Energy Solutions, Jon is responsible for strategy and overall operations. Prior to co-founding Groom Energy, Jon was a general partner at Charles River Ventures (CRV), a leading venture capital firm with $2 billion under management. At CRV, Jon was an active lead investor, board member or advisor for high profile software and service companies such as BeFree (acquired by ValueClick), eDocs (acquired by Siebel Systems), Vignette (VIGN), Virtusa (VRTU) and Xign Corporation (acquired by JP Morgan Chase).

Before CRV, Jon held senior management positions at Open Market, a start-up ecommerce software company that went public in 1996. Prior to joining the early Open Market team, Jon served in a variety of senior product marketing and sales management roles with both Hewlett Packard and J.P. Morgan.

Jon earned his MBA from the Kellogg Graduate School of Management at Northwestern University and a Bachelor of Science in Electrical Engineering and Computer Science from Duke University, where he graduated with distinction. He is a co-founder and Board Member of Digital Lumens, an LED lighting company he co-founded in 2007. Jon is also a past member and committee chair of Duke’s Pratt School of Engineering Board of Visitors as well as the Board of Visitors at The Museum of Sciences Boston.

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Bob Kirby

Executive Vice President

Bob brings over twenty years of energy engineering related experiences to his role at Groom Energy Solutions, co-leading our operations and business development related activities.

Bob brings over twenty years of energy engineering related experiences to his role at Groom Energy Solutions, co-leading our operations and business development related activities.

Prior to co-founding Groom Energy, Bob held multiple positions within Orion Energy Services, a Midwest-based manufacturer of energy efficient commercial lighting and other technologies. Bob began his tenure at Orion as engineering manager. From there he quickly moved from engineering to national account sales where he doubled revenues with a large customer base and was promoted to vice president of sales for the Northeast.

Earlier in his career, Bob spent eight years with Tecumseh Products Company, a Wisconsin-based manufacturing company. There, Bob held multiple roles including engineering manager, group plant engineer, maintenance manager and manufacturing manager, in which he focused on the efficiencies related to process, facilities and energy.

Bob attended University of Wisconsin Fox Valley and completed degree programs in Electromechanical Technology, Industrial and Facilities Engineering, Energy Management and Procurement.

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Fritz Troller

Executive Vice President

Fritz brings over 25 years of senior management experience in both the industrial and electrical distribution markets. In his role at Groom Energy Solutions, Fritz co-leads operations and business development related activities.

Fritz brings over 25 years of senior management experience in both the industrial and electrical distribution markets. In his role at Groom Energy Solutions, Fritz co-leads operations and business development related activities.

Prior to Groom Energy, Fritz was President of Poplar Consulting Group, Inc., providing strategic consulting services to manufacturers, distributors and private equity firms in the supply chain markets. Earlier in his career Fritz was a senior executive with WW Grainger. During his 10-year tenure with Grainger, he held several senior management positions in Integrated Supply, National Accounts, as well as the Industrial Supply Division. As Vice President of Grainger Integrated Supply, he co-founded and built the $240 M division into the industry’s leading Management Services outsourcing entity.

Fritz has a Bachelor of Arts from Miami University (of Ohio), in Marketing with an emphasis in Finance. He has authored several articles for industry publications and has been a noted speaker at many industry conferences including National Association of Purchasing Management, Council of Logistics Management, and the International Parking Institute.

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Nick Balster

Vice President of Industrial Applications

Nick leads Groom Energy’s business with industrial market companies, delivering energy savings projects and services to companies with both discrete and process manufacturing businesses.

Nick leads Groom Energy’s business with industrial market companies, delivering energy savings projects and services to companies with both discrete and process manufacturing businesses.

Prior to joining GES, Nick served as Corporate Energy Manager at Precision Castparts Corporation (PCC), a $6B Fortune 500 manufacturer of complex metal components and products. There Nick’s responsibilities included leading energy conservation and efficiency projects for PCC’s US and worldwide manufacturing facilities. His previous roles included Business Unit manager at PCC Wyman-Gordon Ltd and Operations Manager at PCC’s IPD Reed-Rico Operation.

Nick earned his Bachelor of Science in Materials Science and Engineering from University of Wisconsin-Madison and an MBA from Babson College.

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Steve MacWilliams

Vice President of Sales & Business Development

Steve brings almost 25 years of sales management and business development experience in the Refrigeration, HVAC and software industries to Groom Energy. Steve focuses on developing Groom Energy’s business opportunities in the supermarket, retail and industrial markets.

Steve brings almost 25 years of sales management and business development experience in the Refrigeration, HVAC and software industries to Groom Energy. Steve focuses on developing Groom Energy’s business opportunities in the supermarket, retail and industrial markets.

Prior to Groom Energy, Steve served as Vice President of Sales & Business Development at Source Refrigeration & HVAC, having joined Source at an early stage and being responsible for their significant growth over a 14 year period. During his tenure, Steve also hired and managed the national team of sales engineers providing refrigeration, HVAC and commissioning services to the supermarket and big box retail industry. Prior to Source, Steve served as National Accounts Director at WW Grainger’s Custom Solutions group. Earlier in his career Steve also had management roles at a variety of software and service businesses.

Steve attended the University of Phoenix with a focus in International Business and Marketing. He is an active member of FMI and ASHRAE. He is also a co-founder and Board Member of TrackerPlex, an asset tracking software company.

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Sorena Pansovoy

Vice President of Finance & Operations

Sorena brings over 30 years of senior financial and operations management experience in a variety of industries, including manufacturing, software and service businesses. In her role at Groom Energy Solutions Sorena leads finance and a number of field operations functions.

Sorena brings over 30 years of senior financial and operations management experience in a variety of industries, including manufacturing, software and service businesses. In her role at Groom Energy Solutions Sorena leads finance and a number of field operations functions.

Prior to Groom Energy, Sorena specialized in process-oriented consulting, leading significant organizational change transitions for mid-sized companies. Earlier in her career she held senior finance roles in several different start-up companies. Sorena began her career in accounting as a senior auditor with KPMG, during which time she also completed her CPA.
Sorena earned both an MBA and Master of Science in Accounting at Northeastern University, following her undergraduate education at Tulane University, where she earned a Bachelor of Arts in Political Science.

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