FI-1: new graduates, often hired through the FORD/IARD program, CAST program, or bridged through the student program (CO-OP or FSWEP)
Links to federal government student recruitment programs:
https://www.tbs-sct.gc.ca/tbsrp-prsct/index-eng.asp
http://jobs-emplois.gc.ca/fswep-pfete/index-eng.php
FI-2: intermediate level, the job title could be Senior Financial analyst, Intermediate Financial Analyst, or Financial Analyst
FI-3: senior level, the job title could be Financial Advisor, Senior Financial Analyst, Team lead, or Project lead
FI-4: manager level, the job title could be Financial Manager, Financial Management Advisor, Senior Financial Manager, at a few departments the title could be Director (but actually equivalent to a manager)
EX-1: director level
EX-2: executive director or senior director
EX-3: director general or departmental comptroller
EX-4 or EX-5: CFO
Treasury Board Secretariat: rates of pay
http://www.tbs-sct.gc.ca/pubs_pol/hrpubs/coll_agre/rates-taux-eng.asp
CRA has its own pay scales, but comparable to the rates of pay used by TBS.