Family of Companies:
Milestone Project Services, LLC
SIS SILverstone, LLC
Salmon & Associates
Our varied and extensive experience indicates that successful projects come down to personnel. We incorporate their individual skills in a process that’s geared toward excellence. The intentional pairing of people and process is the reason why clients know that they can trust their projects in the hands of Keystone.
3D Laser Scanning
Controls & Automation
Design & Drafting
Engineering: Civil/Structural, Electrical, Mechanical, Process
Operations & Commissioning Support
Developing career opportunities for our employees while consistently and safely exceeding our clients’ expectations for quality and responsiveness.
To be our clients’ preferred provider of engineering and design services.