Consistent, High Quality Cleaning for Health


Green Source’s mission is to provide our clients and employees with a clean, safe, and healthy environment through comprehensive cleaning and responsive building services. We are professional janitorial company serving other professionals – our clients. We approach every detail with commitment to sustainability and creating a clean work environment for our customers and a healthy space for you, your staff and customers. This business philosophy guides our decision-making and actions and provides our customers with high quality cleaning, responsive service, and the value our clients have come to expect from Green Source.

Our Services

Medallion has proudly serviced the San Francisco Bay Area since 1978.

Our technology doesn’t lie and we don’t hide it from our clients.

Our employees are our best asset and the hours worked show it.

We love loyalty. Our longest tenured employee has been with us for over 36 years.

We kick (and clean) butt in providing sustainable toilet paper for our clients.

By switching to a hybrid fleet, Medallion has removed 187,419 pounds of CO2 emissions.

What’s Your Plan? Green Source Can Help

Contact us to develop your enhanced hygiene, cleaning and disinfection plan for clean, health safe environments.

Preparedness-cleaning frequency-cleaning and disinfection-hand hygiene-awareness-next step.

hard floor cleaning
facility cleaning

Can help you develop an enhanced hygiene and cleaning program. Contact Us Today

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Thank you for your interest in
Green Source Janitorial Services.