We are a respected consulting firm in Vermont and New Hampshire, specializing in the evaluation, design, permitting, and construction administration of water, wastewater, stormwater, and highway improvement projects.

Click on the sector you are interested in to see some of the services we offer and continue scrolling to read more about what we do.

  • Drinking Water Storage and Distribution

  • Wastewater Collection and Treatment

  • Stormwater and Sewer Separation

  • Master Planning and System Evaluations

  • Accessible Design

  • Infrastructure Improvements

  • Stormwater Improvements

  • Water and Wastewater Improvements

  • Permitting Assistance

  • Roadway and Parking Design

  • Sustainable Design Solutions

  • Site Design

  • Municipal Sewer and Drinking Water Connections

  • Onsite Water & Wastewater

  • Subdivision and Boundary

  • Easements and Flood Certifications


From municipalities in need of a new water source, to communities looking to improve poor water quality, and water systems suffering from aging water lines, OCE specializes in source development, treatment, and distribution of drinking water.

  • Source Development

  • Drinking Water Treatment

  • Water Storage

  • Distribution and Transmission Piplines

  • Pumping Facilities

  • Water Master Planning


OCE can provide a full range of wastewater engineering services, including state-mandated system evaluations and the planning, design, permitting and construction-related services for sewer/stormwater system separations and wastewater treatment systems on the municipal, commercial, and residential levels.

  • Wastewater System Evaluations

  • Wastewater Collection

  • Wastewater Treatment

  • Combined Sewer Separation

  • Pumping Facilities

  • Residential Wastewater Design


Developing land in Vermont can be a challenge, given the different layers of permitting that are often involved. We will work with you to identify early in the process potential permitting hurdles and other implications that may derail a project. Once we’ve identified the constraints and opportunities presented by a project, our surveyors perform a detailed survey of the project site. Our firm of civil and environmental engineers then collaborates with you to implement your vision for the property within the confines of the regulations.

  • Site Investigation

  • Survey

  • Site Design

  • Permitting

  • Transportation Infrastructure


Having contributed to the Vermont Stormwater Management Manual, our staff is intimately familiar with the practices and benefits of stormwater treatment, collection, and retention design. On an annual basis, we also work with clients across Vermont to assist with on-going stormwater compliance inspections, permits renewals, and recertification.

  • Compliance

  • Stormwater Treatment Systems

  • Collection & Retention Systems

  • Culvert Design


Our staff completes phase 1 and 2 environmental site assessments (ESA) and performs underground storage closure assessments. The findings of an ESA or underground storage closure assessment may require site remediation. If you own a contaminated property, we are available to assist in documenting the extent of contamination, completing the design and permitting necessary to remediate the site, and carrying out the ongoing compliance monitoring.

  • Phase 1 & 2 Environmental Site Assessments

  • Underground Storage Closure Assessments

  • Site Remediation

  • Compliance Monitoring