The philanthropy has launched a search for a replacement. Art by Nigel Buchanan Joel Wittenberg, chief investment officer at the W.K. Kellogg Foundation, will go into consulting after more than a decade leading investments at the philanthropy. The foundation has launched a search for his replacement. The vice president and CIO oversaw roughly $8 billion in assets at the Battle Creek, Michigan-based foundation, according to his LinkedIn profile, where he announced his retirement on Tuesday. Institutional Investor first reported the departure on Monday. “I’m excited to announce that I’ll be retiring from the W.K Kellogg Foundation after 11 years. On day one, I said this was my dream job and it’s been even more fulfilling for me. I’ve worked with a great investment team and the rest of the inspiring team working on the foundation’s important mission,” Wittenberg said in a LinkedIn post on Tuesday.