Patrick Walsh has resigned as chief executive officer of AAIPharma Services Corp. and Cambridge Major Laboratories, Inc. (CML). Susan Nestegard will take over for Mr. Walsh on an interim basis.   “Now that the initial foundation, leadership team and process initiatives have been identified, it is time for me to step down,” said Patrick Walsh. “Over the last six months, I was asked to shepherd the two organizations through the first phase of the integration process.”   Mr. Walsh joined AAIPharma ...