If I previously worked for the city or state, can I get pension credit for those years of service?

In some cases, Tiers III, IV and VI members can purchase service credit for certain employment they had before joining TRS. For your service to be eligible, the work had to have been rendered while you were in public employment in New York City or New York State. Generally, any New York City or New York State service rendered prior to your membership date may count as pensionable service.