With thousands of oil and gas, engineering and general positions to fill, a mega job fair will be held Tuesday from 10 a.m. to 2 p.m. at the Richard M. Borchard Regional Fairgrounds, 1213 Terry Shamsie Blvd., in Robstown. Free parking and admission. For more information on the job fair or to participate as a company, call 210-785-9300 or visit www.jobnewssananotnio.com.