40 Sustainability All-Stars

September 2011, Green Fleet Magazine - Cover Story

by Lauren Fletcher - Also by this author

Tepas spearheaded all internal driven programs revolving around EMKAY’s green initiatives since 2008. EMKAY was the first and still is the only fleet management company to be certified carbon neutral. He coordinated formal assessment in accordance with the World Business Council for Sustainable Development and World Resources Institute's Greenhouse Gas Protocol. EMKAY’s greenhouse gas emissions assessment quantifies the total greenhouse gases produced directly and indirectly from a business or organization's activities. The program quantifies all six Kyoto greenhouse gases where applicable and is measured in units of carbon dioxide equivalence, including six Kyoto gases: carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, sulphur hexafluoride, and perfluorocarbons.

In addition to EMKAY’s internal program, Tepas has also created a program to assist their customers with similar eco-driven fleet initiatives called goGREEN. EMKAY’s goGREEN helps support fleets with carbon tracking, training, certification, and carbon offsetting. EMKAY’s goGREEN fleet program is unique in that it is easy and flexible program built to accommodate multiple types of fleet driven green initiatives.

Lastly, EMKAY joined as a Smartway partner in 2008 to better provide fleets with yet another way to assess their fleet’s green initiatives.

Thomas is an influential figure in vehicle electrification, whose career has included leadership roles at major automotive manufacturers and EV pioneers.  He is a co-Founder and the CEO of ALTe, whose electric powertrain system will be installed in existing commercial and government fleet vehicles in 2012. ALTe’s powertrain can increase fuel economy up to 200% and significantly lower fleet emissions. Thomas brings 29 years of engineering, program and operations experience from GM, Toyota, Ford, and Tier 1 suppliers including GKN, Collins & Aikman, and Magna Steyr. Previous to ALTe, he led Tesla Motors’ Michigan Tech Center for three years.


Since assuming responsibility for AT&T's Fleet organization in 2007, Webber has demonstrated outstanding dedication to sustainable practices by spearheading AT&T's commitment to alternative fuels — one of the largest in our country’s history. Additional environmentally-focused programs have been implemented under Webber’s leadership, including the diversion of over 4,500 tires from landfills, the collection of more than 355,000 gallons of used oil, and the launch of a corporate-wide anti-idling initiative. Extending his efforts, Webber is committed to sustainable fleet industry advancement, evidenced by his involvement with the Department of Energy and participation in a range of events and activities.


Weir’s involvement with sustainability efforts dates back to early 1990’s when the City of New York enacted Local Law 6 of 1991. Weir and his staff began buying 30% of the City’s light-duty vehicles and its bus fleets as alternative-fueled. During this time, the City purchased and retrofitted compressed natural gas vehicles and also flex-fuel ethanol vehicles. The City agencies also began fueling its diesel fleets with bio-diesel products (B5 and B-20). With the introduction of the hybrids in 2001, the City largely turned to these more fuel efficient vehicles.

With the signing of Local Law 38 of 2005, Mayor Bloomberg mandated Mayoral agencies to buy the cleanest vehicles in the class (sedan, pickup, van, etc.) for 95% of their light and medium duty vehicles procurements. The Mayor also enacted Local Law 39 and 77 which required that all diesel on and off road vehicles be brought up to the current federal emission standards by June 2012.

Under his guidance and direction, NYC is widely recognized as a leader in green fleet technology. Last year, the City was honored as the 9th greenest fleet in the US by Government Fleet News and was 11th in the prior year. Weir was also co-recipient, with the NYC Parks and Recreation, of NAFA’s first annual Green Fleet award. He  has also been a presenter at two Green Fleet Conferences and at the 2009 Alt Wheels Conference.


As Director of Market Development for NGVAmerica, the natural gas vehicle (NGV) industry’s national trade association, and as Director of Market Analysis, Education & Communications of the Clean Vehicle Education Foundation, Yborra assesses NGV market opportunities and barriers and then develops programs to address them. This includes preparing market and technology analyses; advising government and industry RDD&D program task forces; presenting educational seminars and webinars; publishing articles and guest columns in niche fleet sector magazines; and managing NGV industry participation in national fleet-oriented trade events. He also organizes the annual National NGV Conference-Summit and other forums where natural gas engine, vehicle and fuel station equipment providers and their customers share ideas and strategies to build a more sustainable and robust NGV market. In this pivotal role as a recognized leading NGV market expert, Yborra is a frequent speaker at national conferences, symposia and other educational events, and he is sought out by national fleet executives, fuel retailers and natural gas industry stakeholders concerning NGV program development and implementation best practices.


Prior to working on NGV issues, Yborra was president of Energystics, Inc., an energy technologies consulting practice he founded in 1996 to help government and private industry commercialize new and emerging natural gas-fired cooling, distributed generation and industrial technologies. Clients included the US Department of Energy, a variety of HVAC and industrial process equipment manufacturers and leading national accounts in the restaurant, retail and commercial building management sectors. From 1986-1996, he held various communications and marketing positions at the Washington, DC-based American Gas Association.


Zilberfarb’s extensive and diverse involvement with the sustainable fuel industry spans more than 20 years. He has dedicated himself to promoting sustainable energy. He has served as the executive director of National Clean Cities Inc.; a national account manager of alternative-fuel vehicles with Ford Motor Company; a natural gas vehicle program director for Washington Gas; a consultant for the National Biodiesel Board on OEM outreach and education; and as the director of marketing for the Natural Gas Vehicle Coalition.

Zilberfarb currently consults with the Propane Education & Research Council (PERC) to provide commercialization and outreach support for new propane-powered engine technology. His innovative ideas for sustainable fuels have resulted in specific programs and activities that have reduced conventional fuel consumption. These include the PERC Third Thursday monthly webinar series, Training Tuesday webinars, and Free For All Friday webinars, among others. Just as a sampling of his accomplishments, Greg has designed propane mower product studies, created and implemented the highly successful Propane Engine Fuel Summit, hosted dozens of alternative fuel road show events, produced online customer usage videos, organized countless exhibits across the nation to educate fleet managers on their fuel choices, and spoken at hundreds of engagements to promote alternative fuels. Zilberfarb is currently president of The Sales NetWork, a provider of marketing solutions to the alternative fuel industry. 





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