He received a Bachelor of Law from the University of Sydney before becoming a solicitor ion 26 July 1974.
[7] The Legal Services Tribunal found that Mochalski was involved in making false and misleading statements about the Balanced Property Trust, that he had breached his duty to disclose his interest in relation to the Balanced Property Trust and the transactions and he was struck off the roll of solicitors.
[1][8][9] He was the subject of an investigation by the Independent Commission Against Corruption regarding unrelated allegations by John Henry Neal that he had been part of a criminal conspiracy to delay the supply of water to Neal's land and had solicited a bribe of $250,000.
The ICAC found that Mochalski was not involved in any criminal conduct but that he had a conflict of interest and sought to use his position as a parliamentarian to obtain a personal benefit.
[10] Mochalski was initially facing multiple charges of fraud and conspiracy to defraud,[11] however in April 1991 he was committed to stand trial on a single charge, a common law conspiracy to cheat and defraud.