Question: John W. Sidgmore, became the Chief Executive Officer of UUNET Technologies in June 1994, Sidgmore worked to revive WorldCom after disgraced CEO Bernard Ebbers, a Canadian businessman, that co-founded which telecommunications company?
Context: Bernard John "Bernie" Ebbers (born August 27, 1941) is a Canadian businessman.  He co-founded the telecommunications company WorldCom and is a former chief executive officer of that company. Siddharth N. "Bobby" Mehta was former CEO and vice chairman of HSBC North America.  Mehta served as an Advisor of TransUnion since December 31, 2012.  Mehta serves as consultant of TransUnion.  He served the chief executive officer and president of TransUnion from August 2007 to December 31, 2012, and Transunion Financing Corp. until December 31, 2012.  From May 2007 to July 2007, he served as a consultant to the board of directors at TransUnion.  He served as the chief executive officer and president of TransUnion until December 31, 2012.  He served as the chief executive officer of TransUnion LLC.  He served as chairman of the board and chief executive officer of HSBC Finance Corporation from April 2005 to February 2007.  He served as chief executive officer and president of TransUnion LLC from 2007 to 2012.  From 1998 to 2007, he held a variety of positions with HSBC Finance Corporation and HSBC North America Holdings, Inc.  Mehta served as chief executive officer of HSBC North America until February 2007.  Mehta served as consultant of TransUnion since May 2007 until July 2007.  Mehta served as group managing director of HSBC Holdings PLC of HSBC Finance Corp. since April 30, 2005, and its unit chief executive officer since March 2005.  He served as the chief executive of HS BC North America Holdings Inc., of HSBC Finance Corp., from March 2005 to February 15, 2007.  He served as an executive chairman of HSBC Financial Corporation Limited since April 2005 and served as its chief executive officer from April 2005 to February 15, 2007.  He served as the chief executive officer of HSBC Bank USA, N.A. until February 2007.  He served as the chief executive officer of HSBC North America Holdings Inc. since March 2005.  He served as chairman and chief executive officer of HSBC Financial Corp., Ltd.  He oversaw HSBC's global credit card services, its North American consumer lending and mortgage services businesses and its first mortgage operation.  He was also responsible for corporate marketing, strategic planning and corporate development for HSBC North America Holdings Inc. and had responsibility for the strategic management of credit cards throughout the HSBC Group.  Mehta served as group executive of Credit Card Services, Auto Finance and Canada of Household International Inc., since July 2002.  He worked at MasterCard’s U.S. region board since March 2000.  Mehta joined Household International Inc., in 1998.  He served as senior vice president of The Boston Consulting Group in Los Angeles and co-leader of Boston Consulting Group Financial Services Practice in the United States.  Mehta served as a director of Global Board of MasterCard Incorporated since March 17, 2005.  He served as unit chairman of HSBC Holdings PLC and served as its board member since March 2005.  He served as vice chairman and director of HSBC Financial Corporation Limited., (Formerly Household International Inc.).  He has been a director of Avant Credit Corporation since December 18, 2014.  He has been an independent director of The Allstate Corporation since February 19, 2014.  He serves as a member of the advisory board at Core2 Group, Inc.  He has been non-executive independent director at Piramal Enterprises Ltd since April 1, 2013.  He serves on the boards of Datacard, Chicago Public Education Fund, University of Chicago Laboratory Schools, The Economic Club of Chicago, The Field Museum and Myelin Repair Foundation.  He serves as a director of TransUnion Corp. and TransUnion LLC.  He served as a director of MasterCard International Inc. (also known as MasterCard Worldwide) (formerly, MasterCard Inc.), since March 17, 2005.  He served as a director of HSBC Financial Corp.  Ltd.  He has been a director of TransUnion since April 2012.  Mehta serves on the board of international advisors for the Monterey, California, Institute of International Studies and is a member of the Financial Services Roundtable.  He also serves on the board of advisors for the Myelin Repair Foundation.  Mehta holds a Bachelor of Arts in economics from the London School of Economics and Masters of Business Administration from the University of Chicago.  He stepped down as head of the North American unit after the lender raised its forecast for bad loans in the U.S.  He is of Indian descent. Khaled Bichara (Arabic: خالد بشارة‎ ‎ , ] ) (born July, 1971) currently serves as the Chairman of Dada.it, and the Co Chief Executive Officer of Accelero Capital.  Prior to joining Accelero Capital, Bichara was Chief Executive Officer of Orascom Telecom Media and Technology OTMT, Group President and Chief Operating Officer of VimpelCom Ltd. as well as Group Executive Chairman of Orascom Telecom Holding.  Bichara played a pivotal role in the 6.6 billion merger of VimpelCom with Wind Telecom S.p.A, to create the worlds sixth telecommunications carrier.  Before joining VimpelCom, Bichara was the Group Chief Executive Officer of OTH S.A.E.  He sits on the board of OTH since 2003. John W. Sidgmore (April 9, 1951 – December 11, 2003) became the Chief Executive Officer of UUNET Technologies in June 1994.  UUNET was purchased by MFS, later taken over by WorldCom, which eventually bought MCI.  He later became WorldCom's Chief Operations Officer.  Sidgmore worked to revive WorldCom after disgraced CEO Bernard Ebbers left.  Sidgmore was instrumental in beginning to turn around the failed company, revealing to federal investigators an $11 billion accounting fraud, left over from Ebbers' management of the company. Darren Entwistle (born 1962) is a Canadian businessman, president and chief executive officer of TELUS, a Canadian telecommunications company. Mike Long is an American business man, former CEO of several public companies, and currently a founding partner of Sulgrave Partners LLC.  He served as the President and Chief Executive Officer of Continuum, an Austin, Texas IT consulting company, from 1991 to 1997, having started with Continuum as a Director in 1983.  In 1997, Long was named CEO of Healtheon Corporation (now WebMD), succeeding former CEO David Schnell.  Long oversaw Healtheon's initial public offering, traveling between Europe and the United States to woo investors.  Long was able to secure the required investment funds, and saw Healtheon's stock price rise from $8 to a high of $120.  In 2002, Long was recruited to fix the financial struggles of Move, Inc., a company plagued by more than $4 billion in lawsuits and hemorrhaging tens of millions of dollars a quarter.  As Chief Executive Officer, Long was able to revive Homestore, Inc., by changing the business model, rebranding the company as Move, Inc. and returning it to profitability.  Touching on his experience of bringing about the initial public offerings of web-based businesses, Long would say that investors needed to be presented "with an entirely new face every few months," and that "the only way to run one of these Silicon Valley companies was to forget everything you'd learned outside of Silicon Valley." Bradley Wayne Hughes (born September 28, 1933) is the founder and chairman of Public Storage, the largest self-storage company in America doing business as a REIT or real estate investment trust.  As of 2014, Hughes is worth $2.2 billion.  Known all his life by his middle name, B. Wayne Hughes was the company's President and Co-Chief Executive Officer from 1980 until November 1991 when he became Chairman of the Board and sole Chief Executive Officer.  He retired as Chief Executive Officer in November 2002 and remains Chairman of the Board.  He was Chairman of the Board and Chief Executive Officer from 1990 until March 1998 of Public Storage Properties XI, Inc., which was renamed PS Business Parks, Inc. ("PSB"), an affiliated REIT.  From 1989-90 until the respective dates of merger, he was Chairman of the Board and Chief Executive Officer of 18 affiliated REITs that were merged into the Company between September 1994 and May 1998 (collectively, the "Merged Public Storage REITs").  has been active in the real estate investment field for over 30 years. Glen F. Post III (born October 4, 1952) is the chief executive officer and president of CenturyLink, an S&P 500 integrated communications service provider based out of Monroe, Louisiana.  He earned a bachelor's degree in accounting in 1974 at Louisiana Tech University and an MBA in 1976 at Louisiana Tech.  Post joined CenturyTel in 1976.  He was named vice president in 1982 and was promoted to senior vice president and treasurer in 1984.  He was appointed to the CenturyTel board of directors in 1985, and the following year he was promoted to senior vice president and chief financial officer.  In 1988 Post was named executive vice president and chief operating officer.  He became the president and chief operating officer of CenturyTel in 1990.  In 1992 Post was named vice chairman of the board, president, and chief executive officer.  In 2002 he was appointed chairman of the board and chief executive officer.  Since 2009 Post has served as chief executive officer and president of CenturyLink.  His honors include: Louisiana Tech College of Administration and Business Distinguished Alumni in 1991, Louisiana Tech University Tower Medallion Award in 1997 and DeGree Enterprises Lifetime Achievement Award in Business 2003. Jonathan Ornstein is Chairman and Chief Executive Officer of Mesa Air Group, Inc., and was appointed effective May 1, 1998.  From April 1996 to his joining the company as Chief Executive Officer, Ornstein served as President and Chief Executive Officer and Chairman of Virgin Express, a European airline.  From 1995 to April 1996, Ornstein served as Chief Executive Officer of Virgin Express Holdings, Inc.  Ornstein joined Continental Express as President and Chief Executive Officer in July 1994 and, in November 1994, was named Senior Vice President, Airport Services at Continental Airlines.  Ornstein was previously employed by the company from 1988 to 1994, as Executive Vice President and as President of the company’s WestAir Holding, Inc., subsidiary. Mike Lunsford is the chief executive officer of SK Planet, Inc., the U.S. arm of SK Planet, Ltd., a Korean-based company.  He is the former executive vice president and interim chief executive officer of RealNetworks, the former chief executive officer of Rhapsody, a joint venture between RealNetworks and Viacom, and the former president and interim chief executive officer of Earthlink.  Before joining EarthLink, Lunsford worked as a consultant at Andersen Consulting (now Accenture) in Chicago and Scott, Madden & Associates, a management consulting firm in Raleigh, North Carolina.  He received an undergraduate degree and a Masters of Business Administration (MBA) from the University of North Carolina.
Answer: WorldCom