Board of Directors

Cedric Lucas is a Managing Director in the Asset Management Division (AMD) of Goldman Sachs  focused on private equity infrastructure investing in the Americas. He is a member of the AMD Infrastructure Investment Committee and the AMD Sustainability Council.

Prior to joining Goldman Sachs, Cedric led energy infrastructure investing in the U.S. and Mexico at Kohlberg Kravis Roberts & Co., and headed midstream investing at Macquarie Infrastructure and Real Assets. Before that, he focused on energy investment banking and infrastructure finance and engineering.

Cedric earned a master’s degree in Business Administration with high distinction, Baker Scholar, from Harvard Business School, a master’s degree in Civil and Environmental Engineering from Stanford University, and a master’s degree in Engineering from École Centrale Paris. Cedric is also a registered Professional Engineer in California.

In addition to his role as a director of Synagro, he also serves as a member of Synagro Technologies’ Growth, Compensation, Human Resources and Talent and Audit Committees.

Nick Semeniuk is a Managing Director within Goldman Sachs Asset Management.

He focuses on infrastructure investing in the energy transition and has been involved with evaluating and managing investments in the circular economy, waste, environmental, distribution and energy sectors throughout his career. Nick also serves on the board of directors of Synthica Energy, an energy transition platform in the renewable natural gas sector.

Nick earned a bachelor’s degree in Economics from The Wharton School and a bachelor’s degree in Mechanical Engineering from the University of Pennsylvania.

In addition to his role as a director of Synagro, he also serves as a member of Synagro Technologies’ Growth and Compensation, Human Resources and Talent Committees.

Mark Weidman is a former President and Chief Executive Officer of Wheelabrator Technologies, Inc., a $900M/year energy-from-waste business. He led the expansion of the company into the European and Chinese markets, and during his tenure, the company achieved industry-leading safety and operational performance. He has worked in the environmental services sector for more than forty years, specializing in wastewater treatment, biosolids management, waste-to-energy and organic waste management.

Mark is the founder of Birch Tree Environmental Group, LLC a consulting firm he started in 2015 to provide advisory services to companies engaged in the environmental services sector.  He is also a founding partner in Loaded Question Brewing Company, LLC. and serves on the board of directors of BioGreen 360. He has held positions as operating partner, True North Venture Partners; chief executive officer, Harvest Power, Inc.; partner and chief operating officer with Asian Atlantic Industries; president of Bio Gro Systems and president of the processing division at Synagro. Mark is also a registered Professional Engineer in New Hampshire.

Mark earned a bachelor’s degree in Water Resources Engineering Technology from Pennsylvania State University.

In addition to his role as a director of Synagro, he also serves as the chair of Synagro Technologies’ Growth Committee and as a member of Synagro Technologies’ Sustainability and Risk Committee.

Myrtle Jones is the Senior Vice President of Tax at Halliburton Company, in charge of the oil field service company’s global tax strategy and management. Prior to joining Halliburton, Ms. Jones served in finance leadership positions in the oil and gas industry and deathcare services including as vice president Tax and GlobalSantaFe Corporation and senior managing director of Tax and Internal Audit at Service Corporation International.

Myrtle earned a bachelor’s degree in Accounting from Mississippi State University and is a Certified Public Accountant.

Myrtle is also a member of the boards of the Houston Zoo, Stages Repertory Theatre and Dress for Success Houston, is an advisory member to board of the Bloomberg Tax Forum and is a former chair of the boards Genesys Works and the Greater Houston Women’s Chamber of Commerce.

In addition to her role as a director of Synagro, she also serves as the chair of Synagro Technologies’ Audit Committee.

Eric Gernath is a former Chief Executive Officer of SUEZ North America. He has significant leadership experience in the water, waste and utilities sectors worldwide. Joining the SUEZ group in 1991, he managed and transformed businesses across five international markets. From 2007 to 2015, Eric was CEO of SUEZ’ operations in Australia and New Zealand. He also served as chairman of the board of SITA-ResourceCo, a leading manufacturer of alternative fuels.

Prior to this, Eric held positions in France, China, Taiwan and the U.S. In 2004, he became chief executive officer of Teris, LLC, an American hazardous waste treatment company. He also spent five years in senior roles at Nalco, a water treatment company in the U.S., and five years in China as general manager of Degrémont.

Eric is a graduate of the Australian Institute of Company Directors.

In addition to his role as a director of Synagro, he also serves as the chair of Synagro Technologies’ Compensation, Human Resources and Talent Committee and as a member of Synagro Technologies’ Growth and Sustainability and Risk Committees.