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Peter Lorenz

Chief Executive Officer

Peter Lorenz is Chief Executive Officer of Unirac Inc. As CEO, Lorenz oversees all aspects of Unirac’s operations including sales, marketing, engineering, supply chain and finance.

Lorenz brings over ten years of experience in energy and solar power and twenty years of diversified experience in business building, sales and marketing, operational performance improvements and M&A.

Prior to assuming his current role, Lorenz was with Quanta Services, a leading specialty contractor in North America, where as president of Renewable Energy Services he developed the company’s solar strategy allowing Quanta to become the leading solar EPC company during his tenure. Prior to joining Quanta Services, Lorenz worked for the global management consulting firm McKinsey & Company in Houston where his work focused energy firm growth, performance transformations and renewable energy. He was also instrumental in building McKinsey’s global solar competence. Lorenz began his career in finance for Royal Dutch Shell in London.

Lorenz has published and co-authored several articles on electric power and solar energy and been a featured speaker on several industry conferences.

Lorenz has a BA in European Business Administration from Middlesex University and FH Reutlingen and an M.B.A. from Harvard University.


Mark Zwolak

Chief Financial Officer

Mark Zwolak is the Chief Financial Officer of Unirac Inc. As CFO, Mark Zwolak is responsible for the Unirac’s financial coordination with its parent company, Hilti Group.

Currently, Mark assists and advises Unirac with strategic financial objectives and risk management, strategic planning as well as coordinating and optimizing work streams.

Mark has over 15 years of financial management experience with increasing levels of responsibility. Most recently, Mark was a Director of Finance at Hilti North American headquarters in Tulsa, Oklahoma. Prior roles were with CIBA Vision, a Novartis company and AT&T, f/k/a Bellsouth. Mark has extensive international experience and has had two previous expatriate assignments living and working in SE Asia as well as Latin America.

Mark has a Bachelor of Science degree from the University of Georgia and an M.B.A. from Kennesaw State University. Mark also holds a Certified Finance Manager designation from the Institute of Management Accountants and is a Six Sigma Black Belt.


Michael Kennedy

Vice President of Sales and Marketing

Michael recently joined Unirac’s executive leadership team as vice president of sales and marketing, and oversees all sales and marketing activities for residential & commercial roof systems and ground mount & tracker systems. Prior to joining Unirac, Michael spent 17+ years with the parent company Hilti in various roles.

Michael has extensive experience in strategic business development initiatives, product management, leadership development and sales management.

He joined Hilti in 1996 as an account manager and has held numerous roles following a successful sales career including Fire Protection Specialist, Regional Sales Manager, Product Manager and Director of the Chemicals Business Unit. His most recent position was East Division Manager for Hilti North America for the past six years.

Michael holds a bachelor’s degree in Business Marketing from Towson University. He completed graduate work at Hood College MD and participated in leadership courses at IMD Switzerland.


Darren Womacks

Vice President of Operations

Darren Womacks serves as Vice President of Operations for Unirac.

He is responsible for overseeing all aspects of operations, supply chain, product management and product development.

Darren has held multiple positions at Unirac since 2008. Prior to becoming the vice president of residential and commercial group, Darren led the manufacturing and operations as the Senior Director of Operations and as the Director of Manufacturing. Prior to joining Unirac, he was in manufacturing management for General Mills. Darren also served as a Navy Nuclear Submarine engineer for 7 years.

Darren is a graduate of the United States Naval Academy with a Bachelor of Science in mechanical engineering. He also holds an M.B.A. from the University of New Mexico.