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YONERGY is a leading engineering sustainability consultancy firm.

Our mission is to provide clients with a clear perception of the economic,

social, and environmental benefits of profiting sustainability.

YONERGY provides comprehensive energy efficiency engineering

solutions, coordinated as a multi-disciplined approach.


Formulating innovative solutions to complex challenges is what YONERGY does best, and what we enjoy most about our business.  Surpassing expectations is our goal, and great projects are the results. We understand the dynamics of the ever-changing technologies and economic environments. We have developed numerous strategic relationships that allow our clients to capitalize on those changing environments and close the distance between them and their ultimate vision of success. We understand that our success comes only when our clients succeed.

YONERGY’s primary goal is to bring affordable and attainable energy efficiency and sustainable designs and power to building owners in the world. We have over 20 years of broad engineering, technical and leadership experience, having managed building design, facility condition assessments, feasibility studies, LEED design and administration, and life-cycle cost analyses for countless new construction, renovation, and historic restoration projects across the world. His market experience ranges from K-12 schools, higher education, and healthcare to commercial buildings, hotels, malls, mixed-use properties, government facilities, and more.

The founder, Mr. Yonatan Tadesse is a strong advocate for energy-efficient design, and his focus has been meeting or exceeding clients’ expectations for lowering energy usage and costs. He led a team internationally such as, in the US and Pacific Region, including Japan and South Korea. His expertise includes comprehensive energy audits, over 11.8 million square feet of energy modeling and simulation, cost-benefit analysis, performing utility assessment, develop energy conservation strategies and sustainability programs. He evaluated over 750 buildings to determine their energy efficiency performance. He managed over $28 million in performance-based incentives energy programs. He supported the development of several Energy Savings Performance Contracts (ESPCs). 



YONERGY is a leader in mainstreaming new technologies to create cost-effective engineering solutions. We evaluate new technologies to determine the real economical, operational, and financial benefits they will bring to a project. Our clients are our motivators and we thrive on the challenges they offer us.




The organization of every YONERGY project reflects how each engineering discipline we offer influences all the others. Lighting design affects energy consumption. Audiovisual and sound criteria affect HVAC design. And so on. Through careful scrutiny, and by using state-of-the-art computer software, we assure accurate, complete system integration.



© 2019 by YONERGY. 

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