NEW YORK--(BUSINESS WIRE)--Medidata Solutions (NASDAQ: MDSO) announced today that Bruce Dalziel notified the company that he will resign his position as chief financial officer effective some time during the fourth quarter of 2011, while remaining an employee of the company through the first half of 2012, to assist in the transition of his duties and with other corporate priorities. Mr. Dalziel will continue in his current position as CFO until the effective date of the new CFO appointment, which is expected to occur on or before November 1, 2011. Cory Douglas, who is currently serving as the company’s corporate controller and chief accounting officer, will succeed Mr. Dalziel as CFO. Mr. Dalziel’s decision is being made for personal reasons and to pursue other interests and opportunities, and not as a result of any disagreements with the company.