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South Denver It’s About Lives

A Building Service Company

Six decades of consistent cleaning and building maintenance service

Environment Control has been in the building maintenance industry for six decades. While benefiting from the collective wisdom and buying power of a national janitorial service organization, we are locally owned, operated, and committed to the communities we serve and maintain.

From commercial offices to specialized healthcare facilities, we’ve got you covered.

Our Commitment to You

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We’re dedicated to providing reliable service to our clients

  • Dependable service through qualified leadership
  • Time-tested systems that enable consistency
  • Care and concern of local ownership
  • National expertise and buying power
  • Competitive pricing
  • Thoroughly screen employees
  • Optimum insurance protection
  • Supervised and inspected work
  • Tailored programs to meet specific needs
  • Green cleaning supplies
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Our Guarantee:


We record and review all aspects of our quality control system with both management and cleaners to confirm consistent service excellence.


Our Guarantee:

Inspection Reports and Quality Control Reports

We regularly verify the quality of our work after the cleaning is complete. This reporting is shared with you and archived for our records. We also ask our customers to rate the quality of our service each quarter. This rating provides objective feedback regarding your individual satisfaction.


Our Guarantee:

Personal Visits and Customer Requests

We take the initiative to visit each building during office hours to discuss your needs. We electronically track our customer communication and requests to ensure timely completion.

Our Clients


Proudly serving the following industries:

  • Business Offices & Financial Institutions
  • Churches & Religious Organizations
  • Cleanroom & Research Facilities
  • Educational & Learning Institution Facilities
  • Food Processing
  • Government Facilities
  • Healthcare Facilities
  • Industrial, Manufacturing, & Distribution Centers
  • Surgical Centers
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Your Denver Team

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Dean Hanson


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Dean Hanson


Dean started Environment Control of South Denver in August of 2000, with a dream of building a premier service organization. His vision for the company was to provide excellent service for customers and be a fantastic place to work for employees. Each EC company is locally owned and operated so each owner has a big influence on the company structure, systems and success.

Dean earned a Bachelor's Degree from Montana State University and a Master’s Degree from Eastern Washington University. He served 12 Years US Army Reserves where he was honorably discharged. He is currently a Board Member for Southeast Christian School and commits other time and resources to serving in the community in various ways.

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Sean Yoder

General Manager


Sean Yoder

General Manager

Sean has over 15 years of facilities/custodial management experience. Within those 15 years, Sean has been the Project Director over CU Anschutz Medical Campus in Aurora and downtown Denver. Sean worked as operations manager for multiple large accounts from Dish Network home campus, to Starz Encore call center in Colorado Springs. Sean was also brought in to be a consultant for setting up the facilities/custodial for Amazon’s 1.5 million square-foot fulfillment center in east Denver when it was being constructed and opened. Sean has also owned and operated his own business as well as being in the customer service industry for 30+ years.

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Cassandra Caputo

Operations Manager

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Cassandra Caputo

Operations Manager

Casandra has over 4 years of Facilities Management experience, working with Project Management for the University of Colorado Anschutz and Downtown Denver campus, Regis University, Front Range Community College, and Denver Public Schools. Casandra managed union contracts with local union SEIU. Casandra has over 15 years of customer service experience. Cassandra has years of experience working on cars and has a diverse background in floor work of many kinds. This well-rounded experience has established her as our go-to person whenever we are solving mechanical problems or considering new machines.

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Ray Rosales

Director of Value Management

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Ray Rosales

Director of Value Management

Ray oversees all of our hiring and human resource components. He has over 35 years of Facilities/Custodial Management Experience. His experience includes operational management of a custodial contract at Denver International Airport covering 1.5 million square feet. Ray has also operationally managed contracts with the National Renewable Energy Laboratory in Golden (25 buildings, 1.2 million square feet), the General Services Administration Building 56 at the Denver Federal Center (400,000 square feet). AT&T 931 14th Street (550,000) and many other large commercial and government facilities. Ray has worked with union and non-union contracts as well as produced numbers of documents to negotiate the training, safety, and documentation of various contract specifics.

Join our team of committed professionals, and enjoy a rewarding work environment.

Are you looking to join a company that cares about you? We know that our success depends on employee satisfaction and are committed to creating a work environment that satisfies, encourages, and motivates.

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Our Vision

It's about lives

We value every member of our team and consider each person to be part of our family. We prove our care for people in the way we have treated our customers and employees for six decades.

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Team Benefits

Our Employees deserve the best

  • Part-time and full-time job opportunities
  • Top of the line cleaning equipment
  • Green cleaning supplies
  • Flexible schedules
  • Medical benefits

Looking for an employment opportunity?

We are looking for motivated, talented, and caring people to join our team in South Denver.

View Job Openings

Contact Us

How can we help you_


12741 East Caley Ave. Unit 146 Centennial, CO 80111


(303) 799-0303


(303) 799-0304

Start a Quote

Let’s talk about your building maintenance needs