You must use SELECT DISTINCT and specify you ONLY want person id number and job title.
I don't know exactly your fields name, but I think something like this could work.
SELECT DISTINCT ll.id_no AS person_id_number,
lly.job AS person_job
FROM dbo.employeeinfo AS ll LEFT OUTER JOIN
employeeJob AS lly ON ll.id_no = lly.id_no
WHERE lly.job_category = 'cle'