What OSC does

OSC Inc. (also operating as Ontario Speciality Contracting) is a privately held specialty contracting firm founded in 1997 and headquartered at 140 Lee Street, Suite 200, Buffalo, NY. The company delivers four core services: Environmental Remediation, Demolition and Dismantlement, Brownfield Redevelopment, and Nuclear Decommissioning and Remediation Services, serving Fortune 100 chemical, energy, and industrial manufacturers as a preferred specialty contractor. Notable engagements include the Buffalo Color remediation and redevelopment (47 acres), a $25 million battery manufacturing site redevelopment retaining more than 70 employees, the 350,000 SF HealthNow Complex, and EPA-ordered work such as the Tonawanda Coke coal tar storage tank demolition and the Honeywell groundwater treatment facility at the former Detroit Coke and Tar properties. Headcount is in the 251–500 band, and operations extend from Northern Canada to Puerto Rico through multiple operating divisions.

OSC's underlying delivery technology is an owned, specialized heavy-equipment fleet retrofitted with its proprietary OSC Armor safety package, supported by a Behavior Science Technology (BST)-based HSE program, Safety Task Analysis Cards (STAC), weekly safety audits, and Job Hazard Analyses (JHA). The firm's safety program and equipment configuration are reinforced by National Demolition Association Environmental Excellence (2013), ABC Platinum STEP (2012), and Dow Chemical Outstanding Safety Performance (2009) recognitions. The equipment fleet is monetized both internally and externally through a wholly owned OSC Equipment Services division (oscequipment.co), which provides sales, rental, repair, parts, CNC machining, and custom fabrication, including OSC Armor retrofitting to third parties.

The business model is professional services / project-based contracting. Revenue is generated through custom, scope-driven environmental and demolition engagements priced per project via competitive bidding and preferred contractor arrangements rather than standardized or recurring pricing. The company is led by President and CEO John Yensan and founder/board member Jon M. Williams, with a CFO, a VP of Business Development, a VP of Industrial Decommissioning, a VP of Environmental Operations, a General Manager, a Project Manager, and a Corporate Director of Health, Safety, and Environment. Customers are large-enterprise chemical, energy, manufacturing, and nuclear clients; no consumer, SMB, or subscription segments are served. Marketing is conducted through oscinc.com, LinkedIn, Facebook, and industry associations such as the National Demolition Association and ABC.

Name

OSC

Legal name

OSC Inc.

Website

https://oscinc.com

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

251–500 employees

Short description

OSC Inc. is a privately held environmental remediation and demolition specialty contractor serving Fortune 100 chemical, energy, and industrial clients across North America from its Buffalo, NY headquarters, delivering cleanup, dismantlement, brownfield redevelopment, and nuclear decommissioning services using an owned heavy-equipment fleet.

Ownership category

akta.pro rank

Headquarters

HQ city

Buffalo

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Technology or R&D

Revenue model

1. Specialty Contracting Services: OSC generates revenue through environmental remediation, demolition/dismantlement, brownfield redevelopment, and nuclear decommissioning contracting services. Projects are typically large-scale, multi-phase engagements with Fortune 100 and industrial clients across North America.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

OSC is a specialty contracting firm delivering environmental remediation, demolition and dismantlement, brownfield redevelopment, and nuclear decommissioning services for Fortune 100 industrial clients. The company provides turnkey project delivery from site assessment through redevelopment using an extensive heavy equipment fleet outfitted with its proprietary OSC Armor safety package.

Product overview

OSC Inc. is a premier environmental and demolition specialty contracting firm founded in 1997, operating as a unified service provider rather than a software platform. The company offers four core services: Environmental Remediation, Demolition & Dismantlement, Brownfield Redevelopment, and Nuclear Decommissioning & Remediation Services. These services are supported by OSC Equipment Services for heavy equipment needs and complemented by the OSC Charitable Foundation for community engagement. The company's HSE Program and proprietary OSC Armor safety equipment distinguish its operational approach. OSC performs services across North America from Northern Canada to Puerto Rico.

Differentiator

Problem solved

Functional benefit

Products and services

• Environmental Remediation Full-service environmental remediation contractor providing safe and cost-effective solutions for complex contaminated sites, including remedial construction services ranging from excavation and demolition to in-situ stabilization and complex groundwater treatment systems.
• Demolition & Dismantlement Full-service commercial and industrial demolition contractor offering innovative, safe, and cost-effective solutions for complex and challenging projects, featuring the proprietary OSC Armor heavy-duty safety equipment package.
• Brownfield Redevelopment Acquisition, cleanup, and redevelopment of environmentally contaminated properties into facilities that benefit local economies and communities, leveraging extensive demolition and environmental remediation experience.
• Nuclear Decommissioning & Remediation Services Specialized nuclear services including structural dismantlement and decommissioning, soils and sediment remediation, impacted surface remediation, and waste management, supported by a network of radiological testing and oversight partners.
• OSC Equipment Services Full-service heavy equipment sales, rental, repair, parts, and custom fabrication shop offering CNC machining, burning tables, equipment diagnostics, and OSC Armor safety equipment retrofitting to external customers and internal operations.

Quantifiable outcome

• Transformed Buffalo Color brownfield site (47 acres) into WNY Heritage Discovery Center, Medaille Sports Complex, and commercial/retail space
• +3 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• Radiological Testing and Waste Management NetworkcoreOthersOSC maintains a network of partners with the ability to provide radiological testing, oversight, and waste management services for nuclear decommissioning projects. This partnership enables the company to offer comprehensive nuclear services beyond its core demolition and remediation capabilities.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Republic Services: Republic Services is a major publicly traded waste management and environmental services company with industrial customer offerings. While primarily solid waste, its environmental solutions division overlaps with portions of OSC's remediation work and shapes competitive pricing dynamics.
• Clean Harbors: Clean Harbors is the largest publicly traded environmental and industrial services company in North America, offering hazardous waste management, environmental remediation, and industrial cleaning that directly overlaps with OSC's core remediation and dismantlement services. OSC is a regional specialty competitor against Clean Harbors' national footprint.
• ASRC Industrial Services: ASRC Industrial provides environmental remediation, demolition, and construction services to federal, energy, and industrial clients — overlapping significantly with OSC's nuclear decommissioning and industrial remediation offerings.
• Veolia Environmental Services North America: Veolia operates one of the largest hazardous waste and environmental services platforms in North America, overlapping with OSC's industrial remediation and brownfield work, particularly at Fortune 100 industrial sites.
• AECOM Technical Services: AECOM is a global engineering, environmental, and construction services firm with a large remediation and demolition practice serving the same Fortune 500 industrial and government clients as OSC. It competes both directly and as the engineering prime that subcontracts execution work.
• Heritage Environmental Services: Heritage is a large privately held environmental services provider offering hazardous waste management, remediation, and industrial services across North America. It competes with OSC in the environmental remediation and industrial services segments.

Direct peers

• North American Dismantling Corp. NADC is a specialty industrial demolition and dismantlement contractor serving power, refining, chemical, and manufacturing clients. It is a direct comparable to OSC's core demolition and dismantlement line, with similar customer mix and project types.
• Sevenson Environmental Services: Sevenson is a privately held specialty contractor focused on environmental remediation, radiological cleanup, and site restoration for government and industrial clients — a closely comparable business to OSC's nuclear and environmental remediation practice. Both firms compete for federal and industrial remediation work.
• Environmental Restoration (ER): Environmental Restoration is a privately held emergency response and environmental remediation contractor serving industrial and commercial clients. It is a direct, though smaller-scale, comparable to OSC's environmental remediation and emergency response capabilities.
• Brandenburg Industrial Service Co. Brandenburg is one of the largest privately held demolition and environmental remediation contractors in North America, with a multi-service offering in industrial demolition, asbestos abatement, and site cleanup. OSC and Brandenburg compete for many of the same Fortune 500 demolition and remediation mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/oscinc
• LinkedInlinkedin.com/company/osc-inc-
• Xx.com/theoscgroup

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OSC