Eli Bloshtein was named interim chief investment officer of Cook Children's Health Care System, spokeswoman Kim Brown said in an email.
Mr. Bloshtein, an existing employee of the Fort Worth-based system, replaced former CIO Patrick O'Connor, who left in late July.
Information on Mr. Bloshtein's prior title could not immediately be learned.
Apurva Mehta, the system's deputy CIO, also left in July, Ms. Brown wrote. She declined to provide additional information, including the reasons for Messrs. O' Connor and Mehta's departures.
Executive search firm David Barrett Partners is assisting with searches for their replacements. The system oversees about $2 billion in foundation assets.
Information on Messrs. O'Connor and Mehta's plans could not immediately be learned.
