About Sewall

James W. Sewall Company (Sewall) is a full-service consulting firm based in Old Town, Maine. The 140-year-old company offers a wide range of professional services, including civil and transportation engineering, surveying, construction management/administration and inspection, alternative site evaluation and permitting, land use planning, geospatial solutions (aerial & satellite imaging, mapping, application development, and asset management), and natural resources consulting. The Engineering Division includes professional engineers, professional land surveyors, GIS analysts, and technicians with expertise in virtually every discipline of civil engineering, including highway and intersection design, traffic and transportation engineering, site design, structural design, and environmental permitting.  

Sewall was established in 1880 by a civil engineering alumnus of Bowdoin College and a citizen of Old Town. In its early days, the small firm established a market niche in surveying and forestry appraisals for private and public sector clients, while also performing large civil engineering design projects throughout the eastern US. Since that time, Sewall has expanded to include over 50 employees and six offices in four states. Sewall is owned by Treadwell Franklin Infrastructure Capital (TFIC), a company that undertakes project origination and development, financial structuring and project finance for the commercial infrastructure of the United States. 

Sewall’s professionals assist public and private sector clients throughout the United States, Canada, and overseas with projects that range in size and scope from local municipal peer review services to large, multi-year highway design and site development projects.

Our company proudly supports The Nature Conservancy https://www.nature.org/en-us/ and the Olympia Snowe Women’s Leadership Institute https://www.snoweleadershipinstitute.org/