The head of infrastructure and private equity at UniSuper has left the fund less than six months after he started full-time.

Brett Lazarides left within the last fortnight, according to David St John, chief investment officer of the $21 billion industry fund, with the aim of resuming work as an infrastructure consultant, and for family reasons.

Lazarides was appointed by UniSuper as a consultant in February before taking the internal position, which was announced as a newly-defined role, in June.

His responsibilities will be assumed by infrastructure manager Gautam Rajamani while St John determines whether the role will be reviewed or a replacement for Lazarides would be sought. He aimed to decide a course of action before Christmas.

St John said that at this stage it was unlikely that Lazarides would work for the fund as a consultant.

At September 30, UniSuper’s infrastructure portfolio held $1.4 billion, while domestic private equity holdings were $400 million, and international private equity holdings at $600 million.

Meanwhile, the fund is looking for a senior analyst to perform investment research and risk management duties, St John said.