Criminal charges will be recommended against the Sydney police officers who spearheaded a cyber bullying campaign against Greens MP Jenny Leong.

Fairfax Media understands the Police Integrity Commission (PIC) is finalising a brief of evidence for the NSW Director of Public Prosecution which will advocate criminal prosecutions against two serving officers.

The recommendations are the result of a six-month PIC inquiry, Operation Colchester, which has also found that several other police employees engaged in "questionable contact" when they targeted the state member for Newtown with a stream of racist and sexist slurs.

The PIC probe was prompted by a Fairfax Media investigation which revealed how officers from Sydney City Local Area Command, Kings Cross, Bankstown, Cabramatta – and even within senior management – had all contributed to the hate campaign while shielding their identities under the cloak of social media pseudonyms.