The number of job openings in Texas for “petroleum engineers” and “geological and petroleum technicians” decreased from 640 in May 2014 to 622 in June 2014, while the searcher-to-job opening ratio increased from 0.90 to 1.4 in the same span.
The number of job openings in Texas for “derrick operators” and “roustabouts” decreased from 283 in May 2014 to 270 in June 2014, while the searcher-to-job opening ratio increased from 2.63 to 3.01 in the same span. 
Image source: http://wonderfulengineering.com/what-is-petroleum-engineering/.