The NSW corruption watchdog has recommended the sacking and prosecution of the State Emergency Service (SES) Commissioner, saying he sacked a deputy to silence dissent about a number of safety issues.

The Independent Commission Against Corruption says SES Commissioner Murray Kear dismissed deputy Tara McCarthy last year after she blew the whistle on a friend of his, Deputy Commissioner Steven Pearce.

Ms McCarthy said that Mr Pearce engaged in a range of nefarious dealings, including entering into dodgy contracts, misusing SES funds to buy accessories for his car, misusing his SES credit card and forging diary notes to cover it.

The ICAC also says Mr Kear and Mr Pearce were friends before joining at the SES.

It found corrupt conduct by Mr Kear in failing to investigate allegations, simply sacking Ms McCarthy in reprisal for his friend.

The watchdog says the Police Minister should consider firing Mr Kear, who has been on leave all year, and that the Director of Public Prosecutions consider prosecuting him for breaching the whistleblower's act.