Somerville is looking to hire a new disability coordinator by the end of the year, according to Mayor Joseph Curtatone. The new position will be responsible for overseeing improvements and alterations to municipal buildings to bring them into compliance with the Americans with Disabilities Act. The city will write an action plan to address such issues in the spring, Curtatone said in a prepared statement. “This ADA coordinator will help to implement and upgrade several important programs and policies, including an evaluation and transition plan for city programs and services, and renewed recruitment for the city’s Disabilities Commission as part of a larger recruitment process for all boards and commissions.”