Donald Lindsey’s move comes after the University announced last spring it would outsource the management of its endowment and keep Lindsey on to oversee the transition.

An outside firm has not yet been selected, said University spokeswoman Maralee Csellar, though officials originally hoped to make the change by late October.

At the American Institutes for Research, Lindsey will oversee an investment portfolio of about $125 million, according to a release, which is much smaller than the University’s $1.4 billion portfolio. A spokesman declined to say what types of investments he will oversee.

Lindsey had led GW’s office since it was created 11 years ago and has more than two decades of experience managing investment portfolios. He was the University’s seventh-highest compensated administrator in 2012, earning $615,660 in total compensation, according to tax filings.