Does the Employer have to increase the PTO from 2 weeks to 3 weeks after a certain amount of time an employee works in the company? If so, after how long?

Yes, in Ontario if you are a provincially regulated employee - after 5 years of completed employment, your vacation time would increase to 3 weeks per annum (6% vacation pay) in accordance with the Employment Standards Act, 2000. Please contact our office for a consultation.