About Gemini Janitorial Services
Trusted Commercial Cleaning in Wilmington, DE Since 1984
Our Story
A Commitment to Clean Since 1984
Gemini Janitorial Services was founded in 1984 by Janet Killian-Welte with one goal: to provide dependable, high-quality cleaning services for businesses in Wilmington, DE and the Greater Delaware Valley. What began as a small, family-run company has grown into a trusted leader in commercial cleaning and construction clean-up.
For more than 40 years, we’ve built our reputation on integrity, attention to detail, and outstanding customer service. Today, our clients include financial institutions, medical facilities, schools, office buildings, and industrial facilities throughout Delaware.
Our Story
Our Mission and Values
At Gemini Janitorial Services, our mission is simple:
Deliver spotless facilities that create healthier, safer workplaces.
Provide flexible cleaning solutions that fit your schedule and budget.
Respond quickly to emergencies and special requests.
Build long-term partnerships based on trust and reliability.
Meet Our Founder
Janet Killian-Welte
Janet started Gemini Janitorial Services with a clear vision: to raise the standard of commercial cleaning in Wilmington, DE. With decades of hands-on experience, she built a team dedicated to professionalism, training, and customer satisfaction. Her leadership continues to guide our company’s growth and reputation as one of Delaware’s most respected janitorial service providers.
Why Choose Gemini
Why Businesses Across Wilmington Choose Gemini Janitorial
- Over 40 years of local experience
- Licensed, insured, and trusted by Delaware businesses
- Personalized cleaning plans tailored to your facility
- Outstanding customer service and attention to detail
Service Area
Proudly Serving Wilmington, DE & the Greater Delaware Valley
Gemini Janitorial Services provides professional cleaning throughout Wilmington, New Castle County, Newark, Bear, and surrounding Delaware communities.