GBB membership offers the most recognized and trusted online green business certification program available for small and medium-sized businesses seeking market recognition for their commitment to sustainable business practices.

Green Business Bureau’s globally recognized and unique self-paced certification process credits member businesses for green efforts already completed, while empowering further improvement through step-by-step guides for implementing green best practices.

The Green Business Bureau program is based on the concept that good business and green business go hand-in-hand. All initiatives are money saving and deliver significant return on investment that empower member companies to grow stronger and healthier every day.

GBB Leadership

Green Business Bureau is lead by a group of passionate sustainable industry innovators with decades of experience building valuable sustainability, technology and business services companies.

Thomas Permatteo

Tom is the President of the Green Business Bureau and is responsible for the direction and operations of the company. He has been a leader in the Green business community for over ten years and is passionate about bringing practical sustainability solutions to the small business community. He is also a Co-Founder of IzzitGreen Business Rewards. Prior to embarking on his Green initiatives Tom spent over twenty five years in the Technology industry in sales and management. He is an active advisor to several technology start up companies.

Bill Zujewski

Bill is the Chief Marketing Officer of the Green Business Bureau and is responsible for building the company’s brand and promoting the value of being a certified green business and GBB community member.  He is passionate about helping small businesses get greener to make the world a safer and better place.  Bill has over 25 years of global marketing experience and has a proven track record of bringing game-changing offerings to market.  Before joining GBB, he held executive leadership positions at Tulip, PTC, Axeda, Oracle, ATG, eDocs and BroadVision.

Peter Hughes

Peter is the Chief Product Officer of the Green Business Bureau with responsibility for designing, building and maintaining GBB’s website and applications, including GBB’s industry-leading EcoAssessment and EcoPlanner tools. He has been a leader in developing technologies that help small companies realize their sustainability vision and goals for over ten years, both with GBB and previously as a founder of IzzitGreen Business Rewards. Prior to embarking on his green initiatives, Peter spent over 15 years in consulting and product development leadership roles for a range of software and technology services startups.

Sarah Long

Sarah Long is a Sustainability Analyst for the Green Business Bureau and is also their Chief Editor and Social Media Director. Sarah has a Master’s degree in Global Sustainability with a Sustainable Energy concentration from the University of South Florida. Her passion is to help companies across all industries find their unique place in the sustainability movement and identify actionable steps for them to take. Sarah works closely with Green Business Bureau members to showcase their accomplishments, the hardworking individuals behind the success and their visions for the future.

Leah Mowery

Leah Mowery is a Sustainability Analyst for Green Business Bureau who works to develop the latest green initiatives and valuable blog content for companies of all types. She is also the head of Green Business Bureau’s Member Success Team. Leah is passionate about using creativity and storytelling to relay the importance of sustainability. She has served as a Peace Corps Volunteer in Nepal and earned a Master’s in Global Sustainability with a concentration in Climate Change at the University of South Florida.

Kent Shanklin

Kent is Vice President of Business Development and Channels for the Green Business Bureau and is passionate about bringing the Green Certification message to the market. He has been involved with promoting corporate sustainability initiatives for ten years and was formerly a Sales and Management Advisor to IzzitGreen Business Rewards. Prior to entering the Green space, Kent spent several decades as a software technology sales executive.  He and his wife own a small wine brand in Napa, California, and are proud members of Green Business Bureau.

Kevin Ng

Kevin manages GBB member profiles and continually seeks to ensure every member take advantage of all the tools and benefits GBB certification can provide. Kevin firmly believes that the principal key for a company’s sustainability lies within the framework commonly known as the triple bottom line, ie. Profit, Planet, and People. Kevin has been on a social mission throughout his career, has a graduate degree in industrial/organizational psychology, and enjoys using public transportation.

Sam Harris

Sam Harris is a GBB Green Ambassador and is currently acquiring his Masters degree in Sustainable Business at the University of South Florida with an additional graduate certificate in Sustainable Tourism.  Sam believes wholeheartedly in the principle that good sustainable business practices are good for business, improve operational efficiency and create new marketing opportunities. He is excited to channel his passion to help businesses become greener and believes sustainability can more than pay for itself for any size business.


Hiring college students and jump starting their careers is part of our core mission.

Every year we hire interns from around the world to help us develop content, define new green initiatives, improve our solutions, support our members and evangelize sustainability. These Green Ambassadors are critical to our success and have an impactful role here. You can learn more about the role and responsibilities here.

If you are passionate about protecting the planet and are interested in working with us to make the business world more sustainable, eMail us at or contact us.