Stephen M. Jennings, Chairman of the Board of Aspen Technology, Inc., is a Director of the Monitor Group, a family of professional service firms which provides customized solutions designed to enhance the competitiveness of its clients. During his 16 years with the Monitor Group, Mr. Jennings has managed domestic and international projects and relationships in a wide variety of industries ranging from pharmaceuticals and financial services to consumer goods manufacturing and primary metals. He has also done considerable work in the area of corporate strategy and the enhancement of shareholder value.

Mr. Jennings received his M.A. Oxon from Oxford University, where he studied PP&E as a Marshall Scholar. He earned his undergraduate degree, summa cum laude, in Economics at Dartmouth College. In addition to serving on the Board of Directors of Aspen Technology, Inc., Mr. Jennings is a member of Monitor’s Board of Directors and is responsible for the firm’s consulting operations in the Americas. Mr. Jennings also is currently a member of the Board of Directors of LTX Corporation.

Don Casey is currently Chairman and CEO of Mazu Networks, Inc., a network security software company. Mr. Casey brings to this role over 30 years of information technology (IT) management and consulting experience, including 21 years of senior management positions at IBM. Immediately subsequent to leaving his responsibilities as Vice President of Communication Hardware and Software at IBM, Mr. Casey joined Apple Computer as Vice President of Networking and Multimedia. He later served as Vice President of the Spreadsheet division for Lotus Development Corporation, with responsibilities for more than 80% of the company’s revenues. After leaving Lotus, Mr. Casey became President and Chief Technology Officer for Wang Global, where he led the turnaround effort that remade Wang into a software and services company with $3.5 billion in annual revenues. He joined Exodus Communications as President and Chief Operating Officer following the sale of Wang Global to Getronics. Mr. Casey has also served as a business and technology consultant to EMC and Fidelity Investments. He holds a BS degree from St. Francis College in New York City.

Mark E. Fusco joined AspenTech as President and Chief Executive Officer in January 2005, bringing to that role more than 14 years of executive management experience in global IT consulting and software development. Most recently, Mr. Fusco served as President and COO of Ajilon Consulting USA, a $513 million IT consulting firm with 40 offices and over 4,000 employees. Mr. Fusco joined the Ajilon Consulting executive team in 1999 with the acquisition of Software Quality Partners (SQP), an IT consulting firm specializing in software quality assurance and testing which he co-founded in 1990 and led as President until its sale. Mr. Fusco is a graduate of Harvard College and Harvard Business School, and served as a member of AspenTech’s Board of Directors during 2004.

Gary Haroian provides consulting services and direction for public and private emerging growth companies, bringing to this role more than 25 years of experience in helping to build technology companies in the greater Boston area. Mr. Haroian began his practice in December 2002, after holding several executive positions, including Chief Executive Officer,-at Bowstreet Software, a pioneer in the web services management and portal software market. Prior to his association with Bowstreet, Mr. Haroian was Chief Financial Officer and Senior Vice President of Finance and Administration at Concord Communications, a network management software company, and led the company through a successful initial public offering in 1997. He was employed by Stratus Computer for 13 years, serving as that company’s Chief Financial Officer, President and Chief Operating Officer, and Chief Executive Officer, and helping to grow annual revenues from $5 million to $600 million. Prior to joining Concord, he worked as an audit manager for Arthur Andersen and Company. Mr. Haroian is a Certified Public Accountant and is a graduate of the University of Massachusetts Amherst, where he received bachelor’s degrees, magna cum laude, in Economics and Accounting. In addition to being a member of the Board of Directors for Aspen Technology, Inc., Mr. Haroian is currently a director and Audit Committee Chairman for Network Engines (NENG), a publicly-traded company that develops and manufactures storage and security appliances for leading hardware and software companies; Embarcadero Technology (EMBT), a publicly-traded company that provides data lifecycle management software and database tools for leading corporate enterprises; and Silverback Technology, an early stage company that provides network and security management software to small and medium-sized companies.

Joan C. McArdle is a Senior Vice President with Massachusetts Capital Resource Company (MCRC), a private investment company which makes mezzanine investments in emerging growth and middle market companies. Prior to joining MCRC in 1985, Ms. McArdle was employed by the First National Bank of Boston in a variety of capacities, leaving the firm as a Vice President in the Large Corporate/Multinational Group. In addition to her membership on the Board of Directors for Aspen Technology, Inc., she currently serves on the Board of Directors for a number of private companies, and is a member of the Board of Governors of New England Medical Center. Ms. McArdle received an AB degree in English from Smith College.

David McKenna is a partner at Advent International, a global private equity firm. His work at Advent includes retail and distribution sector transactions and for two years McKenna headed the Hong Kong office, where he focused on buyouts in Greater China and Southeast Asia. In addition, McKenna has co-led or participated in a number of Advent investments, including Boart Longyear, Keystone Automotive Operations Inc., Li & Fung (Distribution) Ltd., Inframetrics Inc., Tweeter Home Entertainment Group Inc., Moulin International Holdings Ltd. and Creative Multimedia Corp. David McKenna's private equity experience also includes three years as a senior dealmaker with Bain Capital, working on large buyouts in the industrial, retail and consumer sectors. McKenna began his career as a consultant with The Monitor Group, a leading strategy consulting firm. He graduated cum laude with an AB from Dartmouth College.

Michael Pehl is a Partner at Advent International and brings to that role over 20 years of experience in forming, managing and successfully exiting information technology companies. Prior to his association with Advent, he was President and Chief Operating Officer of Razorfish Inc., which he joined in 1999 following the merger of Razorfish and i-Cube. Mr. Pehl was Chairman and Chief Executive Officer of i-Cube from 1996 to 1999, which he successfully took public in 1998. Previous to his tenure at i-Cube, he founded and led International Consulting Solutions (ICS), an SAP implementation and business process consultancy, which he sold to Deloitte & Touche Consulting Group. He was also one of a team of four that established SAP America. In addition to serving on the Board of Directors of Aspen Technology, Inc., Mr. Pehl is a member of the Boards of Demantra Inc., MTI Technology Corp. (Nasdaq: MTIC), Open Service Inc., and Ultimus Inc.