Management Team

Meet the Lightning Systems management team. Diverse skills and years of experience from a range of industries ensure that we’re the best at what we do, delivering best value for our customers, investors and employees.

Tim Reeser
CEO and Co-Founder

Tim Reeser is CEO and Co-Founder of Lightning Systems.  Lightning designs and manufacturers zero emission all-electric powertrains for medium- and heavy-duty vehicles, including delivery trucks, shuttle buses, passenger vans, chassis-cab models, and transit buses. Lightning Systems investors include BP Ventures, DHI, Aravaipa, and others, and OEM partners include Ford, GM, and Isuzu.   

Tim has a BS in Mechanical Engineering from CSU, and has been involved with alternative transportation technology since 1990, when he helped design the first dedicated CNG truck for General Motors while at Colorado State University.

Prior to co-founding Lightning Systems, Tim served as Vice President of Colorado State University Ventures, where he spun out clean-tech companies and built the framework to support accelerated growth of spin-outs and spin-ins at CSU. Prior to working at CSU, Tim founded, ran and successfully exited multiple software and IT infrastructure companies.  Tim is an award winning speaker and technical author and speaks regularly at industry conferences and events.

Robert Fenwick-Smith
Chairman of the Board

Robert Fenwick-Smith serves as the chairman of the board of directors for Lightning Systems. As the Senior Managing Director of Aravaipa Ventures, he is one of Lightning Systems’ key investors.

Robert founded Aravaipa in early 2008 with 20 years of global experience managing, acquiring, founding, building, merging, and selling companies. He currently serves as Chairman of AXIT AG (Germany), a leading Cloud Supply Chain Management company, where he led a turnaround to current high profitability.

He holds a BA in Economics from HEC Lausanne (Switzerland) and an MBA from Harvard Business School. Robert is frequently invited to speak and serve on Cleantech and Impact Investing panels. He serves on the Executive Committee of the Board of the Colorado Cleantech Industry Association and has built a LEED Platinum home in Boulder, CO.

Rob Mulcair
Chief Financial Officer

Leading the Accounting, HR, Purchasing, and IT Departments at Lightning Systems, Rob Mulcair serves as CFO. He manages the day-to-day accounting and business activities through financial reporting and forecasting, budgeting, and cash and asset management. In addition, Rob carries out HR functions including employee relations and staff development.

Rob holds a degree in Accounting with a minor in Computer Science from William Patterson University along with an M.B.A. in Managerial Finance and Management Information Systems from Indiana University’s Kelley School of Business.

Having joined the company in March 2014, Rob is absolutely essential to the financial and business side of Lightning Systems. With the majority of his career being within technology companies, Rob thrives in a technical environment with strong engineering and design principles.

Bill Kelley
Chief Technical Officer

Bill Kelley recently joined Lightning Systems as Chief Technology Officer, defining our product and engineering strategy as we expand our product line to include electric vehicles, analytics solutions and more. For the past four years, he has served as an expert consultant to the company on technical matters.

Prior to his time as a consultant, Bill was the corporate vice president of advanced engineering for Borg Warner. His positions included overseeing the operation of Borg Warner’s Powertrain Technical Center in Auburn Hills, Mich. and managing the company’s internal investment fund for research and development. He also was directly responsible for design, development and implementation of advanced powertrain products for fuel economy improvement and emissions reductions across the globe.

David Brosky
Vice-President, Sales

Based in the Detroit region, Dave Brosky is Vice-President of Sales for Lightning Systems, responsible for leading the sales effort in North America. He builds strong relationships and secures new business opportunities with customers and partners including Original Equipment Manufacturers (OEMs), dealers/distributors, upfitters/installers and service partners.

He has 25 years of experience in sales, marketing and program management for leading automotive and commercial vehicle parts and equipment suppliers, including Dana Corporation and Robert Bosch. He joined Lightning Systems in March 2014.

For the last 10 years of his career, he has lead the business development and sales efforts for innovative, disruptive technologies resulting in either successful spin-offs or self-sustaining business entities.


Keith Lehmeier
Director of New Product Development

Keith Lehmeier is responsible for managing engineering programs for new products being developed by Lightning Systems. Keith’s first role in New Product Development was as the engineering lead and project manager for the development of Lightning System’s first all-electric platform, the Lightning Electric Ford Transit and has since directed all other new product development for the company.

Prior to his current role, Keith served Lightning as a Project Engineer for hydraulic hybrid trial programs in the US, UK, and India. Keith joined Lightning as a controls and system engineer in 2015, responsible for helping develop and implement the company’s hydraulic hybrid system.

Before to joining Lightning Systems, Keith worked within Woodward’s aircraft division in a position that combined product development with test engineering. Keith obtained a BS in Mechanical Engineering from Colorado State University during which time he worked as an intern working on a thermal battery technology that could be used to increase overall power plant efficiency.

Mark McGrew
Director of Sales, North America

Mark McGrew recently joined the Lightning team and is responsible for leading sales and business development efforts for all Lightning Systems’ products in North America. His primary responsibilities will include identifying and securing business opportunities with commercial and government fleets throughout North America.

McGrew joins Lightning Systems with an 18-year background in national account sales, marketing, sales management and customer service, with vehicle manufacturers serving refuse, food and beverage delivery, package delivery and government fleets. Most recently, McGrew was the vice president of sales for Parker Hybrid Drive Systems Division where he sold more than $10 million dollars in hybrid transmissions into the Class 8 refuse market. Prior to Parker, Mark was director of sales for Navistar International Corporation, where he was responsible for sales of International’s all-electric step vans.

Originally from the Midwest, McGrew holds a bachelor’s degree in marketing from University of Kentucky and resides with his wife and two children, in the Greater Boston area. He enjoys playing golf, watching and cheering for Kentucky in basketball and football, and he founded and serves as the president of the University of Kentucky Alumni in Boston.

Bonnie Trowbridge
Director of Marketing, Communications and Government Relations

Bonnie Trowbridge has been with Lightning Systems since the beginning of the company, providing branding and marketing for all stages, from a 100 MPG sports car concept through zero emission fleet solutions leader. In addition to directing the global Lightning Systems brands, she manages all marketing efforts, handles media relations, government relations, and is responsible for managing grants and incentives for both customers and the company.

Prior to joining Lightning, she raised over $20 million for environmental and human services non-profits/NGOs through public awareness, major gifts, and grants, and has over 25 years of marketing and communications experience in a variety of fields including human services, environmental advocacy, and transportation.. She has a Bachelor’s degree in Art from Colorado State University and takes a variety of continuing education courses every year in topics ranging from social media marketing to human psychology. Bonnie enjoys traveling with her family and competing with her dog in various dog sports.

Tyler Yadon
Director of Engineering

Tyler Yadon serves Lightning Systems as Director of Engineering and is responsible for leading the industrialization of both Lightning Electric and Lightning Hybrid product lines. Tyler also oversees the Data Analytics team, which closely monitors and reports on the real time performance of fielded systems.

Tyler joined the team in 2012 and has previously served Lightning as Controls Engineer and Director of Customer Operations. Tyler has managed customer deployments of LS technology both in the US and internationally and is experienced in project management, client support, software development, automotive integration/engineering, and electrical and mechanical engineering.

Tyler holds a B.S. in Mechanical Engineering from the University of Colorado. He served as Project Manager on the CU Formula SAE Racing Team, earning top marks for business proposal and marketing at the SAE International competition, and winning “Best Mechanical Design Project” at CU’s Engineering Design Expo.