ON JULY 1, KEYSTONE, MARCO, and CSi ARE GETTING A NEW NAME! Keystone Fire and Security

Keystone offers a full range of fire protection, security, communications, and life safety solutions for commercial and industrial organizations of all sizes in Pennsylvania, New Jersey and Delaware. From system design and installation to testing and maintenance, we exceed the need.

To learn more about careers at Keystone, click here.

  • Health Benefits

  • Work-Life Balance

  • Field Team Benefits

  • Paid Holidays

  • Learning & Development

  • Future Planning




Allentown, PA

Cherry Hill, NJ

Deptford, NJ

Downingtown, PA

North Wales, PA

Philadelphia, PA