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National Service Alliance (NSA) recently announced the addition of many member companies.

NSA, headquartered in Mooresville, North Carolina, is a Group Purchasing Organization and membership opportunity for building service contractors.

"We have been a highly trusted and principled presence within the cleaning industry for more than 20 years," says Michael Conrad, president of NSA. "By negotiating cost-effective contracts and building esteemed relationships with our distributor and manufacturer partners, NSA offers unlimited growth potential for contract cleaning businesses."

The NSA membership program also provides innovative programs and cutting-edge solutions most important to cleaning industry contractors wishing to influence and increase their bottom line.

The following have become member companies of NSA:
Preferred Maintenance
Commercial Maintenance Services, Inc.
Sanlapper Cleaning & Services 
Executive Building Maintenance
Professional Building Maintenance
Verde Clean
Performance Plus 
Populist Cleaning Co.