What is the datatype of PERSONNUM?
You can change this in the WHERE clause:
WHERE (EMPLOYMENTSTATUS = 'Active') AND (CONVERT(numeric, PERSONNUM) = 722)
to this, where DATATYPE is the datatype of PERSONNUM, e.g. VARCHAR(20) or NVARCHAR(50), which will make that part a SARG:
WHERE (EMPLOYMENTSTATUS = 'Active') AND (PERSONNUM = CAST('722' AS DATATYPE))
There are no special teachers of virtue, because virtue is taught by the whole community.
--Plato