How We Hire (And Why It Matters)
We are quite picky about who we hire. That is not a policy statement lifted from an HR manual. It is how Mark McGlothlin describes the process: the quality of the crew is the quality of the company.
Every candidate goes through a background check and a reference check before their first day on any client site. Mark hires people local to the areas they serve, because local staff know the neighborhoods and tend to stay longer. After onboarding, the company runs regular surprise spot inspections to confirm the work is holding up on every account, not just during formal reviews.
No competitor in Frisco makes a claim this specific. Most say “quality assured” or “background checked” and leave it there. Regular, unannounced inspections are the difference between a standard that gets stated and a standard that actually holds. That is what 56 five-star reviews and 65+ long-term clients look like from the inside.
How We Work With Clients
Both Sandra and I are very much active in the cleaning of our clients’ offices and facilities. That is Mark McGlothlin’s own description of how the company operates, and it is the most accurate summary of what separates Frisco Brothers from one where the owners manage contracts from a desk.
Mark replies to all inquiries within 24 hours, usually faster. Clients reach the owner directly, not a call center or a rotating account manager. Sandra manages hiring and estimates and works on accounts herself. At a company this size, with the active client roster across Collin and Denton counties, that level of owner involvement is not common. At Frisco Brothers it is how the company has always run.
Close client contact is the norm, not something offered as a premium service. If something needs attention, Mark knows about it. If a client has a concern, it gets handled by the person who owns the company.
What You Can Verify Before You Call
Hartford bond: Frisco Brothers Janitorial Service is bonded and carries general liability insurance through Hartford Insurance. Not “bonded and insured” in the vague sense that every cleaning company claims. Named carrier, not a vague claim. A COI is available on request before service begins.
56 Google reviews at 5.0: That is the current review count, as of April 2026, with zero negative reviews on record. The reviews are on the Google Business Profile and visible to anyone who searches.
25 years in continuous operation: A quarter-century without a lapse in service. Texas state registration certificate available on request.
26+ staff, 65+ active clients: Real numbers, not marketing estimates.
Named clients: Dude Perfect, Stonebriar Church, ELC [church client], Grace Methodist Church, All 4 Frisco Gymnastics, Allstate, A1 Dental, RX Smiles, and Simpson Strong-Tie. Clients include nationally recognized organizations and local Frisco institutions.
On certifications: Frisco Brothers does not hold ISSA, CIMS, GBAC, IICRC, or OSHA certifications, and does not pursue them. Those certifications are required for hospital and surgical center work, which the company chooses not to do. The focus is commercial offices, churches, schools, daycares, and industrial facilities, where deep experience and a strong local crew matter more than credentials designed for medical-grade disinfection. That is a deliberate lane decision, not an oversight.
Frequently Asked Questions
Is Frisco Brothers Janitorial Service still family-owned?
Yes. Mark McGlothlin co-founded the company in 2001. His wife Sandra joined six years ago and is now co-owner. Their son Brian also works as a supervisor. The company is not a franchise.
How long has Frisco Brothers been in business?
Since 2001, which is 25 years of continuous operation in the Frisco area. Mark McGlothlin has been with the company every year of that run.
Is Frisco Brothers bonded and insured?
Frisco Brothers Janitorial Service is bonded and carries general liability insurance through Hartford Insurance. A COI is available on request before service begins.
Do you run background checks on your cleaning staff?
Yes. Every hire goes through a background check and reference check before joining the team. After onboarding, Mark runs unannounced spot inspections to make sure the standard holds at every account.
What cities do you serve?
The 13-city service area covers Frisco, Plano, McKinney, Allen, The Colony, Lewisville, Little Elm, Prosper, Celina, Carrollton, Coppell, Aubrey, and Savannah, primarily across Collin and Denton counties.
Ready to Talk?
The team serves 13 cities across Collin and Denton counties. If you want to verify availability for your location or get a quote for regular cleaning, request a free quote through the contact page. Mark typically replies within 24 hours.
If Frisco is your city, the commercial cleaning in Frisco page has the details on scheduling, what we clean, and how to get started.
You can also reach Mark directly at (214) 618-0816.
