Local: (845) 692-8450  

Toll Free: (866) 572-2454

general contracting and site work:

OCS maintains in-house capabilities to perform many different types of heavy construction projects.  Our Project Managers, Superintendents, and Project Engineers backed by our skilled union labor workforce can tackle the most complicated of projects.  We perform numerous types of heavy construction projects for both the public and private sector each year.  Although the projects are diverse, we bring to work every day our core values of Safety, Quality, Integrity, Commitment to Excellence, and Client Service.


OCS is a leading millwright contractor.  As experts on the safe operation of cranes and rigging; OCS brings a wealth of knowledge to your job site. OCS employs Engineers, Millwrights, and Ironworkers who are certified riggers ready to mobilize on a moment's notice to support your project.  Whether your project is in the planning stages or already in progress, you should contact OCS to ensure your project is completed in a safe and legal manner.


This division specializes in the construction of both water and wastewater treatment plants including pump stations. Our ability to self-perform key processes, combined with extensive experience in construction and start-up of treatment facilities provides a high degree of control over project costs, quality and schedule. We pride ourselves on building relationships with both the Owners and Engineers in an effort to work as a team and provide a successful project for everyone.


Aggregate Quarry Construction and Maintenance:

As far as your Aggregate, Recycle, Concrete and Sand & Gravel system needs, OCS is second to none. Whether it's a crusher rebuild or a complete turnkey system, we have extensive knowledge in the design, fabrication, erection and maintenance of crushed stone, sand and gravel plants, as well as, concrete and asphalt recycling plants.