The easiest time to get hired at one of the seven oil refineries in the Los Angeles area is during what's called a turnaround. These breaks, when the refineries are shut down for routine maintenance, are incredibly labor-intensive. And refineries want to get them done as quickly as possible.
So companies need enough people to get the job done. But those workers must have specific skills.
In this line of work, as with other U.S. industries, there's a skills gap.