I have a query where I have to pass the parameter only if it has a value. I want to pass jobID and workorderID only if it has value not null. I tried CASE but with AND, it’s not working

SELECT * 
FROM ....
WHERE       
    ABS(POS.CosentinoPOTotal - JV.CosentinoTotal) > 0.01
    AND S.StepTypeID NOT IN (14,15)
    AND Job.JobID = @JobID
    AND WO.WorkOrderID = @WorkOrderID