The registered vehicles were issued three speed camera notices between 2009 and 2012, totalling $280 and Silva presented his brother's false details to police when stopped on four occasions.
Nine infringement notices totalling $1755 were issued for registration, warrant of fitness, speeding and restraint offences, and on at least one other occasion he presented the fake licence to police.
Silva gained work at Baypark after returning to Tauranga to live and assumed his brother's identity while working for Bay Leisure and Events between October and May, 2013.
He also obtained unemployment benefits under his brother's name from August 1990 until July 2009, totalling $20,448.90. He failed to declare his wages.
While working at Baypark, Silva also stole another man's identity after finding his wallet and used it to sign up to a Vodafone cellphone contract.
No payments were made and the matter is in the hands of a debt collection agency to recover the costs from the original identification owner.
Silva also forged a written character reference to obtain a rental property in Te Puke.
After moving into a new property in Te Puke he obtained a Genesis energy power account using the other man's stolen identity, and produced an altered tenancy agreement.
Silva was convicted for driving while impaired in April 2012 and lost his own licence for a year and a day but in June 2012 he obtained another driving licence in his brother's name.
He produced it to police on November 7, 2012 when caught speeding and on January 14, 2013 after a tyre fell off his vehicle and he was ticketed for having an unrestrained child in the car.
Silva told police he had used the other identities as his credit rating was "bad".
He will be sentenced on July 1.
Bay Leisure and Events chief executive Gary Dawson said he was unaware of Silva's work history with Baypark as he would have been employed by the council's former trading organisation.
Mr Dawson said background checks were carried out on anyone applying for a job with Bay Leisure, and police vetting checks were conducted for anyone working closely around children, such as pool attendants, childcare centre workers and after school programmes.
"Fortunately identity fraud is pretty rare," he said.