The NSW Crime Commission has swooped on the assets of a former public servant who is accused of taking more than $300,000 in corrupt kickbacks including opulent renovations to his Sydney home and "extensive modifications" to his Saab car.

Phillip Cresnar, who started working at Ausgrid as a graduate in 2006, is facing potential criminal charges after the Independent Commission Against Corruption found he pocketed corrupt payments from contractors vying for lucrative work.

The Crime Commission asked the Supreme Court to make an order under the Criminal Assets Recovery Act, restraining Mr Cresnar from disposing of certain property. Such orders are made in cases where an officer of the commission suspects a person has "engaged in a serious crime related activity".

Mr Cresnar allegedly solicited cash and gifts ranging from airfares and event tickets to a $60,000 custom kitchen for his Alexandria property, an imported marble bath and toilets costing $7800, and $25,000 in performance modifications to his Saab.