Board of Directors

S. Shariq Yosufzai

S. Shariq Yosufzai

Non-Executive Chairman

S. Shariq Yosufzai was most recently the Vice President, Global Diversity for the Chevron Corporation ("Chevron")(CVX), a multinational energy corporation, from 2013 to March 2018. He held a number of positions at Chevron and its various affiliates, including Vice President (from 2010 to 2013); President of Chevron Global Marketing, a business unit within Chevron (from 2004 to 2010); Co-President of Chevron Products Company, North America, Chevron's North America Refining & Marketing operations (from 2003 to 2004); and President of Chevron Texaco Global Lubricants (from 2001 to 2003). Prior to that, he worked at Caltex Corporation, a joint venture between Chevron and Texaco, Inc., as the Corporate Vice President, Caltex Corporation & President, Caltex Lubricants & New Business Development (from 2000 to 2001) and held a number of other senior level management positions at Caltex Corporation from 1998 to 2000. From 1991 to 1998, he worked at Texaco Inc., a subsidiary of Chevron, and served as the President of Texaco Lubricants Company from 1994 to 1998. As part of a joint enterprise between Texaco, Inc. and Saudi Aramco, Mr. Yosufzai was employed at Star Enterprise from 1988 to 1991 where he held a number of positions and prior to that began his career at Texaco, Inc., from 1975 to 1983. His past board memberships include Chairman of the Board of Directors of Caltex Lubricants Lanka Ltd.; Member of the Board of Directors of Caltex Australia Limited; and Member of the Management Committee of Star Enterprise. Mr. Yosufzai currently serves as Chair of the AIChE Foundation (The American Institute of Chemical Engineers) since November 2017, Chair of the Board of Directors of the California Chamber of Commerce and is an Executive Committee Member of the San Francisco Opera's Board of Directors. He previously served as Chair of the Board of the Association of Former Students of Texas A&M. Mr. Yosufzai also serves as Executive Sponsor of Chevron's University Partnership Program for the University of California, Berkeley, and Texas A&M University, and on the Advisory Board of Texas A&M's Dwight Look College of Engineering and on the Chancellor's Century Council of the Texas A&M University System. Named a Distinguished Graduate of the Chemical Engineering Department of Texas A&M University in 1998, in 1999 he became the first person to be honored by the school as both an Outstanding International Alumnus and a Distinguished Alumnus. In 2011, he served as Chair of the Board of the California Chamber of Commerce and was named an Outstanding Alumnus of the Dwight Look College of Engineering at Texas A&M. He attended Extensive Education schools at both Columbia University, Graduate School of Business at Arden House and McIntire School of Commerce, University of Virginia and received his B.S. in Chemical Engineering from Texas A&M University.

Vincent L. DiVito

Vincent L. DiVito

Director

Vincent L. DiVito has served as a member of our board of directors since May 2015. Since April 2010, Mr. DiVito has served as the owner and chief executive officer of Vincent L. DiVito, Inc., a financial and management consulting firm. From January 2008 to April 2010, Mr. DiVito served as president of Lonza America, Inc., a global life sciences chemical business headquartered in Allendale, New Jersey, and also served as chief financial officer and treasurer of Lonza America, Inc. from September 2000 to April 2010. Lonza America, Inc. is part of Lonza Group, whose stock is traded on the Swiss Stock Exchange. From 1990 to September 2000, Mr. DiVito was employed by Algroup Wheaton, a global pharmaceutical and cosmetics packaging company, first as its director of business development and later as its vice president and chief financial officer. Mr. DiVito is a certified public accountant and certified management accountant and is a National Association of Corporate Directors Board Leadership Fellow. He has served on the board of directors and chairman of the audit committee of Entertainment Gaming Asia Inc., a Nasdaq listed company gaming company, since October 2005 and also served as a member of the board of directors of Riviera Holdings Corporation, formerly an AMEX listed gaming and resort company, from July 2002 until the consummation of a change in control of the corporation in March 2011

Sushil Kapoor

Sushil Kapoor

Director

Sushil ("Sam") Kapoor was the Chief Global Operations Officer of Equinix, Inc., a multinational company that specializes in internet connection and related services, since January 2008 until March 2018. As the Chief Operations executive at Equinix, Inc. since early 2001, Mr. Kapoor played a major role in steering the company from near bankruptcy to its current industry leading position. During this period Equinix, Inc. grew from 7 data centers in 6 markets in one country with annual revenue of less than $20 million to more than 180 data centers in 44 metros across 25 major countries spread over 4 continents with annual revenues exceeding $5 Billion. During the same period, the stock price grew from a split adjusted low of around $5 to its current price of more than $400. Mr. Kapoor served as Vice President of Operations of Equinix, Inc., from March 2001 to December 2006 and also served as its Senior Vice President of IBX Operations from December 2006 to January 2008. Prior to joining Equinix, Mr. Kapoor served as Vice President of hosting operations at UUNET Technologies, Inc., the Internet division of MCI (formerly known as WorldCom) from November 1999 to February 2001. He was responsible for the build-out and day-to-day operations of six hosting centers. From May 1995 to November 1999, he served as Vice President, Global Network Technology for Compuserve Network Services, an Internet access provider. Mr. Kapoor served as Senior Director of Telecommunications for over 10 years at Lexis-Nexis in Miamisburg. Mr. Kapoor holds an M.B.A. (Operations Research) from Miami University of Ohio and an M.S. in Electrical Engineering from the University of Cincinnati.

Eric Prouty

Eric Prouty

Director

Eric Prouty is an experienced sustainability-focused analyst and successful business development consultant. In addition to his valuable public company board experience, including as a director of Hudson Technologies (Nasdaq:HDSN), Mr. Prouty has significant experience as an equity research analyst covering the sustainability sector, including at Canaccord Genuity, Adams Harkness and Robertson Stephens.

Mark Slade

Mark Slade

Director

Mark Slade has served as a member of our board of directors since June 2015. Mr. Slade was the chief executive officer and founder of Marex Financial Ltd, one of Europe's leading independent commodity brokers, from January 2006 to January 2011. Marex was a member of the London Metal Exchange, Intercontinental Exchange, The London International Financial Futures and Options Exchange and Eurex Exchange, with offices in London, Geneva and New York. Since leaving Marex Financial, Mr. Slade has held a number of advisory and executive roles. From December 2011 to December 2012, he was an advisor on international business development to the Hong Kong Mercantile Exchange. From January 2013 to July 2013, Mr. Slade was chief executive officer of London Capital Group. Since January 2015, Mr. Slade has served as an advisor on strategy and business development to Tower Trading Group Ltd. In addition to his corporate roles, Mr. Slade also held a number of board and committee appointments within the commodity futures industry, including being a board member of the London Metal Exchange (1999 - 2006) and the Futures and Options Association (2005-2008).

Mark Stevenson

Mark Stevenson

Director

Mark Stevenson has been involved in the lead smelting and battery industry for the past 38 years. His career has covered all facets of primary and secondary lead research and production and battery development working in numerous roles over these years. He is currently the Technical Director for Global Lead Technologies and holds numerous positions throughout the world including Chairman of the Asian Battery and Secondary Lead conferences.

Beginning his career as a metallurgist with Simsmetal, Mark has provided technical support, market development, project implementation and developed product strategies throughout Australia, Europe and Asia through companies including Ecobat Technologies, Nyrstar, Zinifex and Pasminco.

Mark has also been a Director of Smart Storage (Ecoult), responsible for the development and commercialisation of the UltraBattery, a CSIRO developed lead-acid battery/supercapacitor hybrid, and PAM Chairman of the Advanced Lead Acid Battery Consortium, an international R&D consortium dedicated to enhancing the capabilities of the lead-acid battery. He currently holds the position of Chairman and Organiser of the Asian Battery and International Secondary Lead Conferences.