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Management & Directors


The core team of executives responsible for day-to-day management of our business has worked together continuously since 1995. In addition, our board of directors is comprised of the following persons:

Nathan J. Mazurek, Chairman & CEO

Nathan J. Mazurek has served as our chairman and chief executive officer since our inception in December 2009. Since 1995, he has served as the chairman, chief executive officer and vice president of sales and marketing of Pioneer Transformers Ltd., our primary operating subsidiary. Mr. Mazurek began his career in the electrical equipment and components industry in 1988 when he acquired American Circuit Breaker Corp. and served as its president for over two decades. Between 2001 and 2005, Mr. Mazurek acquired and integrated several businesses from MagneTek, Inc., Aerovox, Inc. and Ningbo Shine Electrical Co. Ltd. (China) to form one of the largest manufacturers of AC film capacitors. He served as president of the combined company, Aerovox, Inc., until 2007. Since 1999, Mr. Mazurek has served as a director of Empire Resources, Inc., a distributor of semi-finished aluminum products. He received his BA from Yeshiva College in 1983 and his JD from Georgetown University Law Center in 1986.

Thomas Klink, CFO & Director

Mr. Klink, President of Pioneer’s Jefferson Electric Segment and an experienced financial executive, has been promoted to Chief Financial Officer of Pioneer Power Solutions, Inc., effective January 11, 2016.Most recently, Mr. Klink was President of Jefferson Electric, rising to that position after serving in several positions of increasing responsibility, including chief executive officer, chief financial officer, vice president, treasurer, secretary and chairman of the board of directors. Previously, from 1994 to 1996, Mr. Klink served as a division controller at MagneTek, Inc., a company traded on the NASDAQ, reporting to the corporate controller. His responsibilities with MagneTek included monthly financial reporting, cash flow forecasting, divisional profit and loss forecasts, quarterly financial closing and annual audit activities. In addition to these duties, during his career, he has been responsible for negotiating bank agreements with various lenders, conducting annual audits, overseeing insurance and benefits purchasing, and negotiating material contracts.

Yossi Cohn, Director

Yossi Cohn has served as our director since our inception on December 2, 2009. Mr. Cohn founded YY Capital Partners, LLC, an investment firm, in 2007 and has served as its co-managing partner since its inception. He has served as a member of L3G Partners, LLC since June, 2009. He served as a director of investor relations at IDT Corporation, a NYSE listed telecommunications company, from September 2005 through May 2007. Prior to joining IDT, Mr. Cohn was a director of research at SAGEN Asset Management, an asset manager of funds of hedge funds, from January 2005 through May 2005. Mr. Cohn started his career as an analyst in the funds-of-funds investment group of Millburn Ridgefield Corporation, where he worked from March 2004 through January 2005.

David J. Landes, Director

David J. Landes has served as our director since our inception on December 2, 2009. Mr. Landes has served as President of Provident Sunnyside, LLC, and as President of CYMA Investments LLC, for over the past five years and as President of 516 Churchill Associates, LLC since 2005. Previously, Mr. Landes practiced corporate and securities law at Shearman and Sterling in New York City. Mr. Landes received his BA from Columbia University and his JD from the University of Chicago.

Ian Ross, Director

Mr. Ross has served as a director and chairperson of our audit committee since March 24, 2011. In 2000, Mr. Ross was co-founder and has since served as President of Omniverter Inc., a company specializing in electrical power quality solutions for industrial producers and electrical utilities in the U.S. and Canada. He has also served as the President of KIR Resources Inc. and KIR Technologies Inc. since 1999, companies engaged in management consulting and import/export activities in the electrical equipment industry, respectively. Mr. Ross previously held positions in Canada as Vice President Technology with Schneider Canada, a specialist in energy management, and Vice President of the Distribution Products Business at Federal Pioneer Ltd., now part of Schneider Canada. Previously, Mr. Ross held a number of successive board level positions in UK engineering companies, culminating in five years as Managing Director, Federal Electric, Ltd., before moving to Canada in 1986 at the request of Federal Pioneer Ltd. He received an MA in Mechanical Sciences (Electrical and Mechanical Engineering) from Cambridge University and subsequently qualified as an accountant ACMA.

David Tesler, Director

David Tesler has served as our director since our inception on December 2, 2009. Mr. Tesler has served as chief executive officer of LeaseProbe, LLC, a provider of lease abstracting services, since he founded the company in 2004. In 2008, LeaseProbe, LLC acquired Real Diligence, LLC, a provider of financial due diligence services. The combined company does business as Real Diligence and operates as an integrated outsourced provider of legal and commercial due diligence services for the commercial real estate industry. Prior to 2004, Mr. Tesler practiced law at Skadden Arps Slate Meager & Flom LLP and at Jenkens & Gilchrist, Parker Chapin LLP.  Mr. Tesler received his BA from Yeshiva College, a Master’s degree in Medieval History from Bernard Revel Graduate School and a JD from Benjamin A. Cardozo School of Law.

Jonathan Tulkoff, Director

Jonathan Tulkoff has served as our director since our inception on December 2, 2009. Mr. Tulkoff has served as president of Uniwire International, Ltd. a steel trading and marketing company, since 1995.