While Equity Office Properties officials doubt they will be as acquisitive in the coming years, Johnson has returned to his old job as chief investment officer. He replaces David A. Helfand.

Johnson had spent the last four years as a managing director with Lehman Brothers Holdings Inc., where he helped raise $1.6 billion to launch the firm's real estate private equity group. He also founded Lakeshore Holdings, LLC, a private real estate equity firm, last year.

Covering new ground is old hat for Johnson, as he was involved with Equity Office Properties Trust's initial public offering.

"He was instrumental in our company's early growth, and has always exemplified the culture here," says president and chief executive officer Richard D. Kincaid in a statement. "We feel very fortunate to have him back."

Helfand oversaw the REIT's acquisition of $12 billion in property during his five-year tenure. "David has been a valued member of Equity Office's senior executive team," Kincaid adds. "Our company will continue to benefit from his contributions long after his departure. We wish him well in his new endeavors."