Seidenberg started his career as a cable splicer helper at
New York Telephone, eventually becoming head of
NYNEX in 1994. He took a senior position in
Bell Atlantic after that company merged with NYNEX. When Bell Atlantic became Verizon, Seidenberg was sole CEO of the company. in 1996 Seidenberg became a Trustee of
NewYork–Presbyterian Hospital where, as of 2018, he serves as Vice Chair. In 2006, Seidenberg donated $15 million to Pace University. Pace's School of Computer Science and Information Systems was officially renamed the Ivan G. Seidenberg School of Computer Science and Information Systems. In 2007, President George W. Bush named Seidenberg to the National Security Telecommunications Advisory Committee, which advises the president on communications issues related to national security, emergency preparedness and the protection of critical infrastructure. Seidenberg is a member of the President's Export Council, which advises the President on how to promote U.S. exports, jobs and growth, and the National Security Telecommunications Advisory Committee, which provides counsel on communications issues related to national security. From 2009 to 2011, he chaired the
Business Roundtable. Seidenberg is also a member of the New York Academy of Sciences’ President's Council and serves on the board of trustees of the New York-Presbyterian Hospital, The New York Hall of Science, Pace University, the Paley Center for Media, and on the Board of Directors of
BlackRock Inc. In 2012, Seidenberg joined
Perella Weinberg Partners as an advisory partner. In 2015, Seidenberg joined the Board of Directors of
Afiniti, a US based
unicorn big data business. Seidenberg continues his involvement in wireless communication technology businesses as a member of
Ingenu's board of directors. As of 2015, Seidenberg is also a part-owner of the New York Mets baseball franchise. == Compensation ==