I sometimes find job owners are from an Active Directory group. Here’s a report on how to find these. (The example code also shows one way to delete the jobs.)
USE msdb go SELECT 'EXEC sp_delete_job @job_name = ''' + sj.name + ''';' AS RunSQL, sj.name AS 'job', SUSER_SNAME(owner_sid) AS 'owner', spr.NAME AS 'proxy' --,sj.* FROM msdb.dbo.sysjobs sj LEFT JOIN msdb.dbo.sysjobsteps sjt ON sj.job_id = sjt.job_id LEFT JOIN msdb.dbo.sysproxies spr ON spr.proxy_id = sjt.proxy_id ORDER BY sj.name