Our Services

Commercial cleaning, janitorial & facility services

Tailored cleaning programs for commercial buildings, industrial campuses, healthcare, retail and residential properties, with disinfection built in and deeper treatments available on demand.

Featured project

Brooklyn Navy Yard

NISS provides commercial cleaning and facility work at the Brooklyn Navy Yard — one of the nation's most active industrial campuses, home to hundreds of manufacturers, studios and maritime tenants.

Commercial janitorial programs across office, studio and industrial tenant spaces
Common-area, corridor, stairwell and restroom cleaning on a recurring schedule
Floor care and pressure washing for high-traffic industrial environments
Post-construction and tenant turnover cleaning
Coordinated scheduling around active manufacturing and maritime operations

Brooklyn Navy Yard waterfront industrial campus

Commercial Janitorial & Facility Cleaning

Our core service: recurring, fully managed janitorial programs that keep commercial buildings, campuses and industrial facilities consistently clean, presentable and inspection-ready.

Daily, nightly and weekend porter service
Floor care — sweeping, mopping, stripping, waxing and burnishing
Carpet cleaning and air duct cleaning
Pressure washing for exteriors, docks and walkways
Restroom sanitation and consumable restocking
Trash removal, recycling and common-area upkeep

Facility Management Support

With more than 60 years of combined facility and logistics expertise, we manage the cleaning side of your operation so your team can stay focused on production, tenants and patients.

Dedicated site supervision and trained crews
Custom scopes of work and measurable cleaning specifications
Quality control inspections and audits
Post-construction and tenant turnover cleaning
Special event and seasonal deep-clean projects

High-Touch Surface Disinfection

Built into our cleaning routines: detailed high-touch point disinfection that targets the critical contact areas where germs are most likely to spread.

Door handles & light switches
Desks, workstations & office equipment
Counters, reception areas & shared spaces
Conference rooms, elevators and restrooms

Airborne Disinfecting Treatment (Add-On)

When a deeper reset is needed, our EPA List N-approved fogging treatment covers whole buildings from ceilings to floors, including air returns and vents, eliminating 99.9% of pathogens.

Hospital-grade, environmentally safe solutions
Long-term antimicrobial protection available
Safe for all surfaces, including electronics and fabrics
Ideal after illness outbreaks, move-outs or renovations

Pressure washing a concrete loading dock — Pressure washing

Technician cleaning a ceiling air vent — Air duct cleaning

Clean commercial restroom — Restroom sanitation

Supervisor inspecting a cleaned corridor — Quality inspections

Specialized environments

Comprehensive cleaning solutions for every business need

Industrial & Maritime Facility Cleaning

Robust cleaning for industrial and waterfront settings, including the Brooklyn Navy Yard, focused on operational efficiency and strict compliance with safety standards.

Spotless healthcare facility corridor after professional sanitation

Healthcare Facility Sanitation Services

Sanitation for healthcare environments following rigorous hygiene standards to ensure patient safety and regulatory compliance.

Industrial warehouse interior with polished floors after deep cleaning

Warehouse & Industrial Floor Care

Sweeping, scrubbing, pressure washing and dock cleaning that keep high-traffic industrial floors safe and presentable.

Technician servicing a corporate office lobby

Office & Retail Janitorial

Day-porter and nightly cleaning for offices, retail and shared spaces, with high-touch disinfection and airborne treatment available as an add-on.

Corporate offices & commercial buildings
Industrial, manufacturing & maritime facilities
Healthcare & medical facilities
Retail stores & shopping centers
Residential homes & apartments
Salons, spas and barbershops

Ready for a cleaner facility?

Schedule a walkthrough and we will build a cleaning program around your building, occupancy and compliance requirements.