Kiro also convinced women he met on online dating sites such as Tinder, or businessmen introduced to him by associates, to invest in companies soon to list on the stock exchange.
Police say the funds given to him, totalling $330,000, were never invested.Kiro also obtained $20,000 by deception.
The 35-year-old has now been remanded in custody ahead of his sentencing in April.
According to court documents, Kiro used a forged Fonterra employment contract to obtain a tenancy for an apartment on Gore St, in Auckland's central business district.
It is understood that Kiro lived in the apartment for a short time in 2014.
Kiro, according to court documents, also falsified an offer of employment from AMP Capital as head of investment operations and a contract with AMP Capital in his own name with a $146,000 salary.
As well as this, he also falsified a letter of employment for BT Financial Group.
The FMA could not comment until Kiro had been sentenced.