Established in 1999, we are a premiere Commercial Construction Management firm based in Portsmouth, NH. We serve the building needs of clients across New England, (NH, Maine, & Mass) in the Institutional, Corporate and Healthcare markets. Our highly trained team provides a full range of design/build, preconstruction, construction management and general contracting services. Our professional staff has built a reputation for exceptional knowledge of the regional construction market working in both the public and private sectors. Whether restoration/renovation, new construction, or tenant-interior work, our strategic advantage comes from solid working relationships with the regional subcontractors coupled with our teams combined industry experience in New England. Originally established as a part of A.J. Martini our overall experience is rooted in Martini's 59 year record of outstanding performance. Martini Northern, LLC became a single entity business in 2010.