Quality Building Services

Quality Protection Services


Cleaning Specialists

QBS is owned and operated in the New York Metro area by its founder Mirjana Mirjanic who has created one of the largest certified women-owned companies in New York. We have chosen quality over quantity, allowing us to focus our efforts, thus increasing our expertise in a small geographic region and select vertical markets. This specialization has provided us with the know-how to optimize productivity and efficiency in our cleaning services. In addition, QBS has a narrowly-focused geography which permits centralized storage and distribution of supplies and equipment to deliver the very best customer value. This geographic focus, which includes our 24/7/365 Manhattan-based command center also means our cleaning teams are minutes from any and all issues encountered regardless of time of day. QBS is led by a local, multi-layered management team to reinforce our unmatched committment to client satisfaction, productivity, and efficiency.

Disinfecting office
Disinfecting office
Janitorial uniforms
Cleaning stone

4 Step Approach

QBS prides itself on its unique 4-Step Approach to develop a customized solution for your janitorial needs.

4 Steps:

Identify – Recognize areas of improvement within existing services, products, spaces and personnel.

Plan – Create a tailored, customer-focused plan/process ensuring standards are met when addressing areas of improvement.

Implement Processes – Our 120 day cycle consists of training existing personnel, Identify areas in need of correction, re-evaluate processes and personnel, re-assess, implement and maintain. 

Maintain Standards – Consistent implementation of Quality Control methods that include routine multi-level supervision and inspections.

Areas of Service

  • Commercial Office Cleaning
  • Lobbies
  • Plazas
  • Kitchens, Cafeterias, Pantries Sidewalks
  • Gyms
  • Lavatories
  • Glass Partitions
  • Loading Docks
  • High-Touch Areas (light switches, handrails, elevator buttons, door knobs, countertops, sinks, keyboards, etc.)
  • Disinfection and Sanitization
  • Pest Control
  • Dedicated Porter/Matron
  • Carpet and Floor Care
  • Construction Clean-up
  • Exterior Pressure Washing and/or Steam Cleaning
  • Special Event Clean-Up
  • Graffiti Removal & Cleaning
  • High-Dusting
  • Upholstery / Fabric Cleaning
  • Rubbish and Recycling Removal
  • Composting
  • And more


QBS successfully implemented a comprehensive green initiative at every level of our corporation. Our Green Cleaning program was designed to meet current industry standards established by the U.S. Green Building Council’s LEED program for existing buildings.

Green Seal Products

Our green initiative includes the use of sustainable products and equipment, Green Seal certified cleaning chemicals (products), Energy Star rated equipment and biodegradable plastic trash liners.

Leed Accreditation Assistance

QBS can help you earn points toward certification under the U.S. Green Building Council’s LEED‐EB rating system.