Telephone interview. Pleasant, comfortable, and informative. Ask for references, number of years in oil and gas industry. Ask what companies I had worked for. Wanted a description of job duties I had performed. Wanted to know what type of shale I had worked with. What type of rigs I had worked on. What type of equipment I had worked with. What kind of certifications I had to enforce the job titles I had carried. How much time I would need to give current employer before leaving?