Medidata Solutions CFO Bruce Dalziel to Present at the 2010 MIT Sloan CFO Summit

FOR IMMEDIATE RELEASE

Dalziel to Provide Insights Based on Medidata’s Successful
Public Financings at the Nation’s Premier One-Day Summit for Financial Leaders

NEW YORK, N.Y. – November 5, 2010 – Medidata Solutions (NASDAQ: MDSO), a leading global provider of SaaS-based clinical development solutions, today announced that Chief Financial Officer Bruce Dalziel will join more than 500 CFOs, senior financial executives and MIT Sloan School of Management faculty as a featured panelist at the 2010 MIT Sloan CFO Summit.

Now in its eighth year, the Summit will take place on Thursday, November 18 at the Boston Marriott Newton from 7:30 a.m. to 6:00 p.m. ET. This year’s theme of “Back to Growth” focuses on providing practical insights and strategic counsel from successful CFOs about how to grow in today’s changing business environment. One of more than 30 presenters from a wide range of industries, Dalziel will share insights on Medidata's successful IPO and secondary efforts during the “Money, Money, Money!” session taking place at 11:00 a.m. ET.

“We successfully completed Medidata’s IPO and secondary offering in 2009, during one of the most challenging economic environments and in an increasingly competitive market,” said Dalziel. “We look forward to exchanging ideas with other leading financial executives on best practice capital strategies at various stages of company growth.”

For more information on Dalziel and other Medidata Solutions executives, please visit
http://www.mdsol.com/about/team_management.htm.

About the MIT Sloan CFO Summit
The MIT Sloan CFO Summit is the nation’s premier CFO event. Each year, the event offers a day of cutting-edge programming that addresses the changing role of the CFO. The event is rich with opportunities for practical education and peer networking in a time-efficient format. The summit is part of the CXO Series produced by the MIT Sloan School of Management, one of the world’s leading academic sources of innovation in management theory and practice. The annual events are organized 100% by alumni volunteers. By promoting the MIT philosophy of “mens et manus,” or “mind and hand,” they are able to bring together the academic research from MIT Sloan with today’s corporate financial leaders to foster debate and provide informative discourse. For more information and registration details, please visit www.mitcfo.com.

About Medidata Solutions Worldwide
Medidata Solutions (www.mdsol.com) is a leading global provider of SaaS-based clinical development solutions that enhance the efficiency of customers’ clinical trials. For over 10 years, Medidata has consistently brought next-generation innovation to the life science industry to lower the total cost of clinical development through informed trial planning and management, optimized clinical processes and platform interoperability. Medidata’s advanced solutions address key functions throughout the clinical development process including protocol development (Medidata Designer®), trial planning and management (Medidata Grants Manager®, Medidata CRO Contractor®), user and learning management (iMedidata™), randomization and trial supply management (Medidata Balance™), monitoring (Medidata Rave Monitor, Medidata Rave Targeted SDV), Serious Adverse Events capture (Medidata Rave Safety Gateway) and clinical data capture, management and reporting (Medidata Rave®). Our diverse customer base spans biopharmaceutical companies, medical device and diagnostic companies, academic and government institutions, CROs and other research organizations, and includes more than 20 of the top 25 global pharmaceutical companies as well as organizations of all sizes developing life-enhancing medical treatments and diagnostics.

Media Contact:
Susan McCarron
Lois Paul & Partners
781.782.5767
Susan_McCarron@lpp.com