Arianna Huffington, editor-in-chief and co-founder of The Huffington Post and soon-to-be president and editor-in-chief of Huffington Post Media Group following HuffPost’s merger with Aol, added another title: member of the board of directors of The Center for Public Integrity.

The investigative news organization also added investment banker Frederic Seegal to its board. Seegal is currently with Peter J. Solomon, and he has held top posts with Wasserstein Perella, Salomon Bros., and Lehman Bros.

CPI executive director William E. Buzenberg said:

Arianna is a major asset to our board. She understands the importance of nonpartisan investigative journalism, and she has proven instincts on how the Internet news marketplace is evolving. I welcome her counsel as we continue to innovate at the center in the years ahead.

Fred is an extremely knowledgeable media insider. He accurately understands today’s competitive media landscape and where there are significant opportunities for the Center for Public Integrity. I am thrilled to have him join our board of directors.

Huffington added:

I’m very pleased to be joining the board of CPI, which is doing so much to advance the cause of investigative journalism. In these tumultuous times for the Fourth Estate, it’s vital that we have places that ensure that the most important stories of our time aren’t just covered after things go bad — as happened with the war in Iraq and the economic crisis — but are uncovered before disaster strikes. We need fewer autopsies of what went wrong and more biopsies of what is about to go wrong.

And Seegal said:

I have had the good fortune to work with most of America’s leading media companies during my career. I am proud to be affiliated with the center as it expands and reshapes our country’s great tradition of investigative journalism.