Mel Karmazin is Chief Executive Officer of SIRIUS XM Radio, America's satellite radio company delivering the "The Best Radio on Radio" to more than 18.5 million subscribers, including 100% commercial free music, and premier sports, news, talk, entertainment, traffic and weather. Karmazin oversees all aspects of the company's operations from its New York City corporate headquarters.

Previously, he was President and COO of Viacom from May 2000 until June 2004. Karmazin served on the Viacom board of directors and was responsible for overseeing all of Viacom's operations. Viacom Inc. is one of the world's largest entertainment and media companies and a leader in the production, promotion, and distribution of entertainment, news, sports, and music. The company's properties include CBS Television, MTV Networks, BET, Showtime Networks, Infinity, Viacom Outdoor, Paramount Pictures, Paramount Television, Paramount Parks, UPN Blockbuster, Simon & Schuster, and theatrical exhibition operations in North America and abroad.

Prior to that, he served as President and Chief Executive Officer of CBS Corporation from January 1999 – May 2000. Before becoming Chief Executive Officer, he was President and Chief Operating Officer of CBS Corporation from April 1998 to January 1999. He joined CBS in January 1997 as Chairman and Chief executive officer of CBS Radio through a merger of Westinghouse/CBS and Infinity Broadcasting. He had served as Infinity's President and Chief Executive Officer from 1981 until Infinity became a wholly owned subsidiary of Viacom in February 2001. He was named Chairman and Chief Executive Officer of CBS Station Group (Radio and Television) in May 1997. Prior to Infinity, Karmazin spent 10 years with Metromedia.

Karmazin is vice chairman of the board of trustees of The Paley Center for Media and serves on the board of Autism Speaks. He was inducted into the Broadcasting Hall of Fame, and has received the National Association of Broadcasters National Radio Award and the IRTS Gold Medal Award.

Scott Greenstein is President and Chief Content Officer of SIRIUS XM Radio, overseeing all of the satellite radio broadcaster's programming, marketing and corporate marketing activities.

Greenstein has extensive entertainment industry experience, and prior to joining the company he was a consultant to SIRIUS on the strategic agreements that were forged with the National Football League and Penske.

Previously, Greenstein was Chairman of USA Films, a motion picture production, marketing and distribution company. At USA Films, he managed all aspects of its film activities and supervised the company's home entertainment business through USA Home Entertainment which handled home video/DVD distribution for the National Football League, National Hockey League, National Basketball Association and Major League Baseball. Under Greenstein's leadership, USA Films released Steven Soderbergh's Traffic as its first in-house supervised production, which won four Academy Awards and two Golden Globe Awards.

Greenstein also served as Co-President of October Films, where he was instrumental in acquiring, marketing and releasing such critically acclaimed films such as The Apostle, and the Academy Award-winning documentary The Last Days, which was executive produced by Steven Spielberg. Prior to joining October Films, Greenstein was Senior Vice President of Motion Pictures, Music, New Media and Publishing at Miramax Films, where he executive produced Anthony Minghella's The English Patient, which won nine Academy Awards, including Best Picture and Best Director.

Greenstein also served in senior management positions at Viacom International.

He reports to Mel Karmazin, the company's Chief Executive Officer.

James E. Meyer is responsible for overseeing and directing all of the operations and sales, including its automotive OEM (original equipment manufacturer) business, retail markets, product management, strategic partners, engineering functions and geographical expansion.

He reports to Mel Karmazin, SIRIUS XM Radio's Chief Executive Officer.

Prior to joining SIRIUS in May 2004, Meyer was President of Aegis Ventures, a general management consulting company, and provided consultant support for SIRIUS.

Before Aegis, he held a number of senior management positions in consumer electronics, including the Senior Executive Vice President of Digital Media Solutions for Thomson, a worldwide leader in consumer electronics. In this job, Meyer had full responsibility for Thomson's Digital Media Solutions Business Unit, a global business serving the entertainment, broadcast and content industries, and which included such clients as Disney, Warner Brothers, Dreamworks, Microsoft, Direct TV, ABC and BBC.

He also was Thomson's Chief Operating Officer for the Americas and Senior Vice President of Product Management, and held other senior management positions at Thomson, General Electric and RCA during his 25 years in consumer electronics.

Meyer serves on the boards of Gemstar-TV Guide, Mikohn Gaming Corporation, Escient Solutions and Equant.

Dara Altman is Executive Vice President and Chief Administrative Officer of SIRIUS XM Radio.

She reports to Mel Karmazin, SIRIUS XM's Chief Executive Officer.

From January 2006 until the SIRIUS XM merger, Ms. Altman was the Executive Vice President of Business and Legal Affairs for XM Satellite Radio where she ran the Legal and Business Affairs Departments as well as Public Policy, Business Development, Human Resources and Facilities.

Prior to joining XM, Ms. Altman was the Executive Vice President of Business Affairs for Discovery Communications, Inc. At Discovery, Ms. Altman oversaw and directed all business negotiations for Discovery's global televisions assets, including Discovery Channel, TLC and Animal Planet. In addition, she was responsible for the talent relations department, the production management department and Discovery's international television syndication businesses. Ms. Altman was also a member of the Board of Directors of the Discovery Times television network, which was a joint venture between Discovery Communications and The New York Times.

During her 20-year career, Ms. Altman has also held several other key legal and management positions at entertainment media companies, including HBO.

Ms. Altman began her career as an associate at the New York law firm of Willkie Farr & Gallagher, specializing in securities matters. She received her J.D. from Columbia University School of Law and her B.A. from Amherst College.

Patrick Donnelly has been the Executive Vice President and General Counsel for SIRIUS since May 1998, managing all of the Company's legal and governmental affairs.

From August 1999 to April 2001, Donnelly also served as the acting Chief Financial Officer at SIRIUS, a position in which he completed six financings for the company yielding $800 million in gross proceeds.

Donnelly has broad experience in corporate finance activity and management, having worked for 10 years as an in-house counsel and as a practicing attorney.

Prior to joining SIRIUS, Donnelly was Vice President and Deputy General Counsel of ITT Corporation, the diversified hotel, gaming and entertainment company that was acquired by Starwood Hotels & Resorts Worldwide, Inc. Donnelly was instrumental in ITT's defense of Hilton Hotel's hostile takeover, including ITT's sale of Madison Square Garden and the company's ultimate sale to Starwood. He also managed day-to-day activities of the legal staff and served as a liaison to the legal departments of ITT's subsidiary enterprises.

Donnelly began his career as an associate at the New York law firm of Simpson Thacher & Bartlett, specializing in merger and acquisitions and securities matters.

Donnelly received a J.D. magna cum laude from Cornell Law School. At Cornell, he served as an editor of the Cornell Law Review and received the Order of the Coif. He also received the American Jurisprudence Award in Debtor and Creditor Law.

Previously, he was awarded his A.B. magna cum laude from Lafayette College in 1984 and won the Wall Street Journal Prize.

David J. Frear joined SIRIUS in June 2003 as the Company's Executive Vice President and Chief Financial Officer, bringing considerable knowledge of public company financial operations to SIRIUS as the Company grows its business.

Frear reports directly to the SIRIUS XM Radio CEO, Mel Karmazin.

Prior to joining SIRIUS, Frear was Executive Vice President and CFO for SAVVIS Communications, a global managed network services provider with operations in 44 countries. He was recruited by SAVVIS to develop the SAVVIS business plan, build its staff and take the new global data communications company public in a $400 million offering in February 2000. His responsibilities included accounting, treasury, tax, investor relations, insurance, planning and cost control.

Frear also served as Senior Vice President and Chief Financial Officer for Orion Network Systems in Rockville, Maryland, coming to this international satellite services company following the restructuring of Millicom, where he also served as CFO.

Joining Orion prior to the start of commercial operations, Frear assisted Orion in raising over $850 million to fund the construction of the Company's global satellite system. He also played an important role in Orion's $1.5 billion purchase by Loral Space and Communications.

In addition to serving as Chief Financial Officer for Millicom, Frear also held management positions at Bear, Stearns & Company, Credit Suisse, Transway International and Deloitte & Touche.

He received an MBA from the University of Michigan, Graduate School of Business Administration in Ann Arbor, Michigan.