David John Frenkil 


David John Frenkil founded Centennial with the purpose of making it easier for businesses to operate in emerging markets, with a focus on more affordable, reliable and environmentally sustainable electricity supply.   

As an Infrastructure Project Finance Attorney in Los Angeles at Chadbourne & Parke and in Washington, DC at Sullivan & Worcester, he focused on distributed solar portfolios for utility-scale, as well as commercial and industrial-scale projects.  His experience includes drafting and negotiating project documentation (PPAs, EPC Agreements, O&M Agreements, Site Leases) and Purchase & Sale Agreements, Equity Contribution Agreements and Loan Agreements for over 50 transactions representing $700 million in investment value and more than 230 MW in 17 jurisdictions.

He holds a Juris Doctor from the George Washington University Law School and B.A., Magna Cum Laude, from the George Washington University.  

He can be emailed directly at



Erica Mbanda manages Centennial’s business development activities in Rwanda and throughout the region.  She brings extensive experience to Centennial in project and relationship management, procurement and acquisition of businesses.  

Prior to joining Centennial, Ms. Mbanda worked as the Executive Assistant of Special Projects to the CEO of a major holding company in Rwanda with a portfolio of leading cross-sectoral businesses.  In this role, her focus was within the construction and hospitality sectors.  

Ms. Mbanda holds an undergraduate degree in Psychology/Sociology and a Master’s in Counseling from the University of Colorado at Colorado Springs.  

She can be emailed directly at

Jean Pierre Murenzi


Jean Pierre Murenzi brings technical expertise to Centennial's sales team.  Trained in electrical and computer engineering at Carnegie Mellon University, Mr. Murenzi offers a thorough knowledge of energy markets in East Africa, and experience in finding solutions to the region's electricity challenges.  

Prior to joining Centennial, Mr. Murenzi worked with leading solar companies focused on rural electrification in Tanzania and Rwanda.  His work has been published by the Institute of Electrical and Electronics Engineers (IEEE).  

He holds a Master's of Science in Electrical and Computer Engineering, Cum Laude, from Carnegie Mellon University and a B.A., Cum Laude, from Southwestern University in Texas.  



Ildephonse Timothy Niringiyimana manages Centennial's project construction, asset management, and customer site visits.  

His prior experience includes hospitality, construction and logistics throughout Sub-Saharan Africa.  

Mr. Niringiyimana has worked with Centennial since the company first entered the market in Rwanda.  He has studied in the Rwanda and Uganda.




Rosine Mukabalisa is an Administrative Assistant with Centennial. She is currently studying for level F5 of the Association of Chartered  Certified Accountants (ACCA).  

Her previous experience includes working at the Statistics Departments of Kicukiro District and Nyarugenge District, and freelance translation from Kinyarwanda to English.  

She received a Bachelor of Commerce from Bharathiar University in Coimbatore, India.



United States



Nathaniel Greeson serves as Counsel for Centennial, with a focus on project documentation and investment.  He has served in various legal and counsel capacities across Federal and international organizations, including the U.S. Environmental Protection Agency, the U.S. Department of Homeland Security, and the UN Food and Agriculture Organization. 

Mr. Greeson holds a Juris Doctor from Vanderbilt University School of Law and a B.A. from Belmont University.

Shane Trexler


Shane Trexler brings a depth of experience in engineering and design for sustainable facilities.  He has advised private companies and governments on the implementation of energy conservation plans and has designed, developed and integrated renewable energy technologies for these customers.  His portfolio includes integrated solar, wind, and battery storage systems as well as supplemental grid-tied solar generation for large commercial buildings.

He holds a Bachelors of Science in Mechanical Engineering from Rensselaer Polytechnic Institute, an MBA from George Mason University, and he is also a LEED Accredited Professional.