GXT Green Management Team

Manas “Bob” Chatterjee, President

A dynamic leader and accomplished executive, Bob Chatterjee has over twenty years of business leadership experience in business management, strategy, marketing and sales across a diverse range of corporate, start-up and turn around environments.

Bob is intellectually aggressive and has an exceptional track record of identifying core issues and setting strategic direction based upon competencies and market opportunities. A builder of world-class teams, he has exceptional skills in developing, empowering, and motivating individuals and teams to meet and exceed goals.

Prior to GXT Green, Bob has held senior management and executive positions for a notable list of public and private companies such as President & CEO of a Financial Services company, Managing Partner of a Business & Executive coaching firm, Senior Vice President of Sales, Marketing and Operations of a Global Information Technology company and Senior Vice President of Marketing and Sales of a International electronics manufacturing company.
Bob has a Bachelor's degree in Commerce, with majors in Accounting, Economics, and Marketing, graduating with honors from Delhi University.


Michael C. Vanin, Chief Operating Officer and Senior Vice President of Sales

Michael Vanin is an innovative business executive and agent of change with exceptional experience in developing and executing strategic plans, and building successful sales organizations. He brings over 20 years of outstanding accomplishments in the technology, education and financial services sectors to GXT Green.

Michael has held senior positions at EMC, the Greenvale School, Mercury Wealth Management and Prudential Securities where he was awarded highest honors for consistently overachieving corporate and client expectations. While managing major market complexes, he developed innovative and effective strategies that lead to sales acceleration, record revenue and profitability improvement. He has held advisory positions for regional complexes with combined revenue of over $90 million where he developed and successfully executed effective strategies that resulted in an organic 50% profit improvement.

Michael has consulted with major corporations and non-profit organizations as well committing significant time serving as a chair and board member on many Boston based enterprises including the Boys and Girls club, Charles River School, Dana Hall School, and St. Andrew’s Church of Wellesley.

Michael is a graduate of University of Albany, did his graduate work at Columbia University and continuing education at Babson Center for Executive Education, Harvard University and Wharton School of Business. He is a member of the Carbon Market Business Network, New England Senior Executive Network, and Green and Sustainability Innovators.

Rengan Kannabiran, Senior Vice-President and Head of Research and Development

Rengan is an expert in Polymers, Adhesives, and Coatings for Industrial Packaging.

He has a distinguished career of 25+ years at Tyco Plastics and Adhesives, Sealed Air, Polaroid, Corning, Inc. and GenCorp. He holds 16 US patents, has published numerous industry papers, and is credited with development of a dozen new products in the packaging and plastics industries.

Rengan received his PhD in Materials Engineering from the University of Pittsburgh.

Arun Koul, Vice President of Technology

Arun Koul has held leadership positions in technology and services companies and has helped in growing several startups from inception stages. He has proven experience of leading application and software development teams in the delivery of large systems as well as innovative, custom solutions. Arun has built large development and delivery organizations from the ground up. He has held top management positions with responsibilities in the areas of Program Management, Client Services, Software Development and Marketing, leading teams and large scale operations.

Arun has a Masters degree with specialization in Information Systems from the M.S. University in India and has undertaken several professional development courses in Computer Science at the University of Massachusetts.