I created a query to look for jobs not owned by SA, and discovered a small "gotcha". A LEFT JOIN would work, of course, but I don't really need it.
-- Jobs not owned by sa.
-- N.B.! DO NOT JOIN to Master.dbo.syslogins as some websites suggest.
-- Using Windows integrated security means that the job owner may be an individual without a specific login, if the login
-- was created for a Windows group.
-- For example, when I create jobs, the owner defaults to OURDOMAIN\myusername, but there is no corresponding login.
SELECT suser_sname(owner_sid) as OwnerName, *