About Us

Our Story

CleanTech is a fully licensed and insured company, serving the Metropolitan Area since 1994, specializing in post-construction and commercial cleaning services. We are proud of an excellent reputation as a dependable and knowledgeable company, willing to adapt to the particular needs of our clients. We care about what your image says to your customers, and our service reflects that dedication. Our high retention and referral rates, tell us that our clients agree. 

We stand committed to excellence in service by combining properly trained personnel and effective management. We believe in quality work, reasonable rates and fast, courteous service. CleanTech is a member of the Building Service Contractor Association International (BSCAI), a program to help our company maintain its high quality standards. We are also very proud to be a part of the National Minority Supplier Council. 

Our People

Nilthon Alvarado


Born in the small province of Trujillo, Peru, Nilthon immigrated to the United States at the age of 17. Without any formal post-secondary education, he became passionate about reading, particularly entrepreneurial books, which deeply inspired him to start his own business. Finally in 1994, Nilthon embarked on a pioneering journey as he founded CleanTech Building Maintenance Inc.

CleanTech is one of the leading construction clean-up companies in the DC metropolitan area. Known for Nilthon’s principles: building loyal relationships by helping companies showcase clean, finished projects – with a passion for service, quality and attention to detail.

After a courageous battle with lung cancer, Nilthon passed away June 6th, 2013, yet his legacy is vibrantly felt throughout the company among employees and clients alike.

Carmen Alvarado

CEO & President

Also a Peruvian native, Carmen moved to the United States in 1980. She began her professional career working for the World Bank in Washington, D.C. Alongside her husband Nilthon, they founded CleanTech in 1994. What started as a small business quickly grew into a multifaceted corporation where Carmen was able to apply an administrative and organizational outlook as Vice President of the company.

Together as a team, Nilthon and Carmen participated in many national small-business conferences, including Building Service Contractors Association International (BSCAI), in order to propel their company. In 2013, Carmen became CEO and President of CleanTech, following her husband’s footsteps. She is driven by his dedication for service and his compassion for employees. Carmen continues his legacy by exemplifying his work through top-quality service and performance.                                     

Company Values

Professional Quality

Our qualified staff has over 50 years of combined experience in janitorial services and has performed thousands of construction clean-up jobs.

Fair Price

We price our services fairly to the satisfaction of all stakeholders, specifically our customers and employees.


We provide our services 24 hours a day,  7 days a week, 365 days a year and are at your availability for all inquiries or questions you may have.


We are fully insured and bonded, with coverage for liability, workers’ compensation, automotive and umbrella.

Training & Education

Competence, management expertise and technical training programs acquired from BSCAI are innovative and intensive to motivate our employees to give our customers consistent and committed service.


We carefully recruit our people for trustworthiness, reliability, and attention to detail. Through their effective management and frequent inspections, quality assurance is successfully controlled.


It is through effective communication and timely responses to your requests that we will ensure we are meeting all of your building service needs.

Safety Regulations

We follow safety procedures as required by the Occupational Safety and Health Administration (OSHA), as well s “right-to-know” laws with respect to the handling of cleaning chemicals.

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