We are proud of our affiliations

At Lewis Tree Service, we know that we are stronger because of our partners who provide us with training, education, best practices, knowledge, and expertise in all areas of vegetation management and utility line clearance.


Utility Arborist Association

The UAA is an organization of over 4,200 individuals with interest in and a commitment to the maintenance of trees and other vegetation for the purpose of ensuring the safe and reliable distribution of energy, including electric, oil, and gas, to business and residences


International Society of Arboriculture

Through research, technology, and education, the International Society of Arboriculture (ISA) promotes the professional practice of arboriculture and fosters a greater worldwide awareness of the benefits of trees.


Tree Care Industry Association

The TCIA develops safety and education programs, standards of tree care practice and management information for tree and landscape firms around the world. We provide continuing education, training, conferences and publications to promote the safe and appropriate practice of tree care.


Arbor Day Foundation

Founded in 1972, the centennial of the first Arbor Day observance in the 19th century, the Foundation has grown to become the largest nonprofit membership organization dedicated to planting trees, with over one million members, supporters, and valued partners.


ESOP Association

The ESOP Association is America’s largest employer-sponsored advocacy and education association focused on employee stock ownership plans. Founded in 1978, the Association seeks to enhance federal laws governing ESOPs, provide members with expert information, and fund research via the Employee Ownership Foundation (an affiliate).


National Center for Employee Ownership

The NCEO is a nonprofit membership and research organization that was founded in 1981 to provide the most objective and reliable information possible on employee ownership at the most affordable price possible.


Employee Ownership Foundation

Employee ownership improves our competitiveness, our productivity and our free enterprise system. Employee ownership should be a key economic force in America.


Rochester Area Business Ethics Foundation

The Rochester Area Business Ethics Foundation (RABEF), celebrating corporate ethics. We work with B2B companies, charities, and nonprofit organizations to promote ethical business practices by instituting The ETHIE Award, an award that honors companies who have high standards for business.


New York & New Jersey Minority Supplier Development Council

The New York & New Jersey Minority Supplier Development Council, Inc. (The Council), established in 1973, is a vital link between major corporations and minority business enterprises (MBEs). Each year, member corporations have reported billions of dollars spent with Council-certified Minority Business Enterprises. Serving the New York and New Jersey region, The Council is one of the 23 regional affiliates of the National Minority Supplier Development Council, Inc. (NMSDC).

Women Presidents’ Educational Organization

The Women Presidents’ Educational Organization (WPEO) comprises two of the 14 regional partner organizations of the Women’s Business Enterprise National Council (WBENC)—the nation’s leading advocate for women-owned businesses. WPEO was founded in 1998 by Dr. Marsha Firestone, a pioneer in opening doors for women-owned businesses.


Connecticut Tree Protective Association

CTPA is an educational association dedicated to advancing the care of Connecticut’s trees.  Currently, we have over 780 members, of whom approximately three-quarters are licensed arborists.