About Duncan and Sons'
In 1989, Gary Duncan founded this company out of necessity to care for his growing family. His heart for service led him to the janitorial field. Mr. Duncan recognized the value of a clean working environment and the benefit this brings to clients.
His dedication to providing excellent service by utilizing a people-centric approach has resulted in a company culture that celebrates and values the individual employee as much as the clientele. His impact on the community, company employees, and their families has been felt all over East Tennessee, Kentucky, and now Salt Lake City, Utah. We celebrate the legacy of Gary Duncan each day as we renew our commitment to each other and our clients.
Despite the challenges that the Covid era has brought forth, Duncan and Sons not only survived, but actually saw growth by adding disinfectant services. We are proud that we were able to keep our employees working for the duration of the pandemic while providing the essential services to allow businesses to stay open/reopen and operate safely.
Today, Sheri Henegar continues to build upon the foundation and established by Mr. Duncan. Commitment to serving the client’s needs as a top priority is the time proven method that has been the key to our success.
Continuing our growth, our leadership has seized an opportunity by partnering with Clean Team, an Ohio-based business dedicated to helping service companies excel.
Sheri Henegar, President
At Duncan & Sons' since 2015
As President she is involved in all aspects of the company, her desire is for all employees to find “joy in the job”. She enjoys spending time with her family and traveling.
Mark Woods, Operations Partner
At Duncan & Sons' 2016
Having risen through the ranks to his current position, Mark is one of the problem solvers in the company. When not at work he likes to build or fix things and can usually be found in his shop at home.
Anne Freeman, Administrative Partner
At Duncan & Sons' 2005
Anne finds her job to be extraordinarily fulfilling and enjoying. In her spare time, she loves traveling, trying local eateries, watching sports & living her best empty nest life with her husband
Jesse Carpenter, Customer Care Manager
At Duncan & Sons' since 2016
Jesse started with the company over 6 years ago. He is the proud father of 13 children. When not at one of his kids events he loves to motor boat in the waters of East TN, but gets to the ocean as much as possible.
Sherri Maynard, Recruiting & Hiring Manager
At Duncan & Sons' since 2017
Sherri is very passionate about helping people. She enjoys social activities, most of all with her granddaughter! Her hobbies include interior decorating and creative design.
Rebekah Rankin, Procurement
Having grown up a sale shopper, Beka very much enjoys the challenge of procurement. She spends her free time cooking, organizing, and exploring Knoxville with her outdoor-loving kids.
About Clean Team
Clean Team, Inc. was founded in 1996 in Toledo, Ohio, with a mission to provide top-tier commercial janitorial services. Under the leadership of Bob Armbruster, the company has grown significantly, expanding through strategic acquisitions while maintaining a steadfast commitment to quality and customer satisfaction.
Today, Clean Team operates from 18 offices across 12 states, serving a diverse range of industries, including healthcare, manufacturing, distribution/fulfillment, education and office environments. Clean Team’s comprehensive service offerings include full janitorial services, hard floor care, carpet care, porter services, and electrostatic disinfection.
As a proud member of the Building Service Contractors Association International (BSCAI), Clean Team is dedicated to delivering healthy and cost-effective solutions that meet the unique needs of each client.
Our Company Values
Our values drive everything we do, helping us deliver excellence to our clients and foster lasting partnerships
Innovative Solutions for Facility Management
We are committed to providing innovative solutions that elevate your business. Through highly trained personnel, superior products, and dependable service, we give you the Clean Team Advantage—smart, efficient service powered by dedicated professionals. Our tradition of hard work, integrity, and a positive approach ensures that we meet your facility management needs with consistency and care.
Hiring the Right People, Supporting the Community
We believe that great service starts with hiring the right people. That’s why we focus on recruiting talented individuals who are local to the communities we serve. By investing in local talent, we not only strengthen our team but also contribute to the economic growth of our community. Our employees are more than just workers; they are neighbors who take pride in the work they do for businesses in their own towns.
Building Lasting Partnerships through Retention
Our success is built on the strength of our people. By hiring exceptional employees and recognizing their contributions, we create a culture of excellence. Our proactive on-site management, ongoing training, and routine inspections support a customer retention-focused model that fosters accountability and long-term relationships. We are dedicated to servicing your facilities today, tomorrow, and into the future, making customer retention our priority.
Reliable Service That Earns Trust
Consistency is at the heart of why our clients choose and recommend Clean Team. Our unwavering commitment to delivering dependable janitorial service helps drive your business to new heights of success.
Benefits of Working with Duncan and Sons'
In Business Since 1989
Committing ourselves to customer satisfaction that has kept us in business.
Reliable Service
Consistent and reliable service.
Knowledgeable, Dedicated Team
Offers ongoing training programs for our valued employees.
Dedicated employees
We are appreciative of loyal employees that work hard every day to keep customers happy.
Local Business
Rooted in the Knoxville area, we're not just your janitorial services company, but your neighbors as well.
Professional Affiliations
