No, your potential employers should not consider that conviction in its decision making process.  Have a look at Massachusetts General Laws Chapter 151B (Massachusetts Fair Employment Practices Act), section 4 makes it unlawful:

For an employer, himself or through his agent, in connection with an application for employment, or the terms, conditions, or privileges of employment, or the transfer, promotion, bonding, or discharge of any person, or in any other matter relating to the employment of any person, to request any information, to make or keep a record of such information, to use any form of application or application blank which requests such information, or to exclude, limit or otherwise discriminate against any person by reason of his or her failure to furnish such information through a written application or oral inquiry or otherwise regarding: (i) an arrest, detention, or disposition regarding any violation of law in which no conviction resulted, or (ii) a first conviction for any of the following misdemeanors: drunkenness, simple assault, speeding, minor traffic violations, affray, or disturbance of the peace, or (iii) any conviction of a misdemeanor where the date of such conviction or the completion of any period of incarceration resulting therefrom, whichever date is later, occurred five or more years prior to the date of such application for employment or such request for information, unless such person has been convicted of any offense within five years immediately preceding the date of such application for employment or such request for information.

The Employment Practices Act applies to government agencies and private employers with 6 or more employees.  Hope that helps.  For more general information, visit our Massachusetts Employment Law Discussion Forum.  Good luck.