We’re building a legacy of quality in environmental consulting and contracting

Onesky Engineering, Inc. had its beginnings in 1996. Mark W. Onesky, P.E., an environmental consultant and engineer, recognized that many clients were still searching for a quality environmental consulting and remediation services firm. Onesky Engineering, Inc. was formed to fill that need.

Initially, the company focused on environmental field services, including soil, vapor, and groundwater monitoring and sampling and also remediation system installation and O&M. As the firm grew, we added expertise in geologic interpretation, risk assessment, and real estate transaction and brownfield services to our core competencies.

Today, in addition to our proven track record at petroleum and brownfield sites throughout the mid-Atlantic region and beyond, Onesky Engineering, Inc. offers energy efficiency and alternative energy consulting services as a natural extension of our core services.

Keys to our success have included exceptional expertise, low staff turnover, and client loyalty.