Tuba Malinowski joined Principal Real Estate Investors, the realty group of Principal Global Investors, as director of institutional marketing. Ms. Malinowski will be based in Atlanta and cover the western United States. She replaces Mitch Pleis, who is moving to a portfolio management role, said Tina Marchetti, company spokeswoman. Ms. Malinowski had been a director in the marketing department of Timbervest LLC, Atlanta. Her duties will be assumed by William Boden, a principal and partner, and Carlton Walstad, client relations manager.