This is an exerpt from the Bylaws to give an overview of the Officer position of President. For the complete document, please refer to blog post Forming the Organization: EIN, Articles of Incorporation, Bylaws, 501(c)(3) & Other Foundation Documents
The president shall be the chief executive officer of the corporation and shall, subject to the control of the board of directors, supervise and control the affairs of the corporation and the activities of the officers. He or she shall perform all duties incident to his or her office and such other duties as may be required by law, by the articles of incorporation of this corporation, or by these bylaws, or which may be prescribed from time to time by the board of directors. Unless another person is specifically appointed as chairperson of the board of directors, he or she shall preside at all meetings of the board of directors. … he or she shall, in the name of the corporation, execute such deeds, mortgages, bonds, contracts, checks, or other instruments which may from time to time be authorized by the board of directors.