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Years In Business

Square Feet Per Day

Quality Driven Team


In 1967, with two small children and another on the way, George Agostini, working full-time in the family construction company, began Ocean State Janitorial Service, Inc. by purchasing some commercial cleaning equipment and various other supplies. Working on little sleep, George started to cleaning his very first account at night. Quickly proving his ability to provide a high-quality service at reasonable prices, George promptly built a portfolio of cleaning contracts. Initially focused on the challenging cleaning of retail stores, George’s reputation quickly expanded, and he and his well-supervised crews began servicing office buildings, private schools, and a variety of other buildings. By 1983, Ocean State Janitorial had grown to over 120 employees servicing 80 accounts.

In 1983, after receiving his Bachelor’s Degree in Business Management from Providence College, David began working alongside his father and assumed control of the company in 1985. David became Vice President from 1986 until 1992 when he assumed his present position as President and CEO. Since that time, David’s focus on quality, customer service, building relationships, exceeding customer expectations, training, response time, and supervision, has helped him grow the company to where it now services over 600 clients.


Seeing a lack of pride within the industry, David began the franchise division, Cleantech Services Inc. in 1995. Cleantech Services, Inc. provides our very best employees and other entrepreneurial individuals with the opportunity to partner with us to better serve our clients’ needs. Our family-owned business has helped dozens of entrepreneurial individuals establish and maintain their own successful cleaning franchise. Utilizing state of the art equipment in conjunction with our extensive training program, our franchisees are prepared and skilled at creating comprehensive cleaning programs to provide clean, healthy work environments to their clients.


Cleaning buildings at higher quality levels all the time and faster than competitors, having a sustained system of quality control and customer interaction, and treating customers like they are more important than anyone else, have been strong ingredients in becoming an outstanding service company. Underscoring all of this has been his belief that if you treat people with dignity and respect and make them feel like part of a family, they will give you their very best all the time. That is exactly what we have done and exactly what he has received in return. A strong management team, outstanding account supervisors and custodial technicians, has allowed us to obtain a reputation for superior service and remain the premier cleaning company in Rhode Island, Massachusetts, and Connecticut.


Family Owned

CleanTech Services, Inc. and Ocean State Janitorial Services have been family-owned and operated since its inception in 1967. The owners and their management team get personally involved in ensuring that your business receives the best quality cleaning and building maintenance services for the most reasonable price. Though we have grown substantially over the past 50 years, clients and team members are guaranteed the personal, family touch.

After five decades, we know what a difference that makes.


Quality Guarantee


Property management companies, building owners, company owners, and facility managers in all types of commercial, institutional, educational, and industrial markets trust Ocean State Janitorial Service, Inc. for all of their most demanding cleaning services.

With our obsession with quality and customer service coupled with management involvement, you can be assured that your facility will be impeccably maintained and will reflect the professional image you want to project to your clients and employees.


Our track record is the best testament to our dependability. Many of our clients have been with us for over 20 years with several exceeding 25 and even 30 years! Our client retention is one proof of the high quality, personalized service that we provide. Our clients know they can depend on us. We’re always available for you and your business 24-hours a day, seven days a week, that’s the Ocean State Janitorial difference.

Insurance & Bonding

General Liability

We have a general liability policy that includes $2,000,000 of general aggregate coverage and $1,000,000 per occurrence. Our $ 5,000,000 umbrella policy provides even greater peace of mind to our clients.

Workers Compensation

A $1,000,000 workers compensation policy covers our employees.


A $50,000 janitorial bond covers all employees of Ocean State Janitorial.

You’ve got enough on your plate. Let our team focus on maintaining the cleanliness and sparkling reputation of your facility.