Since 1996, MSS has made thousands of facilities more efficient, comfortable, secure and reliable for owners, operators and o ... ccupiers across the Carolinas and throughout North America. We offer 7 SERVICE LINES: 1. HVAC Service 2. Mechanical Design and Construction 3. Fire Alarm & Life Safety 4. Security Systems 5. Building Automation & Controls 6. Network & Systems Integration 7. Energy Management & Analytics For 5 MARKET SECTORS: 1. Commercial Office 2. Healthcare 3. Industrial & Manufacturing 4. Data Centers & Critical Environments 5. Hospitality From 8 OFFICE LOCATIONS throughout the Carolinas serving NC, SC as well as customers and projects across North America. And for a company that specializes in indoor environments, we are just as passionate about preserving the outdoor environment. read more