You shall perform for the Company the duties customarily associated with the office of [ Title ]   and such other duties as may be assigned to you from time to time by the Company’s [ Title ] or the Company’s Board of Directors (the “ Board ”) that are consistent with the duties normally performed by those performing the role of the most senior executives of similar entities.  You shall devote substantially your full business time and best efforts to the performance of your duties hereunder and the business and affairs of the Company and will not undertake or engage in any other employment, occupation or business enterprise; provided ,   however , that you may participate as a member of the board of directors or advisory board of other entities and in professional organizations and civic and charitable organizations; provided   further , that any such positions are disclosed to the Chief Executive Officer and/or the Board or the Audit Committee thereof and do not materially interfere with your duties and responsibilities to the Company.  You shall be based in the Company’s principal offices, which currently are in Waltham , Massachusetts.