National Service Alliance (NSA) announces the addition of SeaCrest Services, Inc. SeaCrest Services California provides the expertise that comes with 40 years’ experience in transforming commercial properties. Their integrated facilities services (IFS) include janitorial, landscaping and staffing — a broad range of support for busy property and facility managers. The primary mission at SeaCrest Services California is to build successful long-term relationships with their clients by ensuring open communication, optimal service, trust, integrity, and understanding. Seacrest provides services to Los Angeles, Orange County, and San Diego County in California.