Valero's own hiring guidance says candidates may be screened by phone, video or on site, that most questions are behavioral, and that some roles require a test before an interview is scheduled. The only first-hand public accounts we could actually read are from US refinery Operator Trainee candidates, who describe an online application followed by a secondary application questionnaire, then an aptitude/battery test, and only then an interview invitation. No public first-person account we could reach described the interview rounds themselves in any detail.
These 2 writeups cover operations, engineering roles, US refineries only. All of them were posted under a pseudonym (Reddit, GeeksforGeeks or forum handles), so we could not verify the authors’ identities.
Typical rounds
1.51-2 range
Most common round
Take-home
Sources span
2023
Most frequently reported · Aptitude(1), Behavioral(1), Shift availability(1)
Valero Energy’s official process
Valero's careers site states that candidates may be interviewed by phone, video or onsite, that many of its questions are behavioral-based so candidates should come with concrete past examples, and that some positions require a test to be completed before an interview is offered, coordinated by the recruiter. It also says recruiters typically respond within about 30 days of application, that some postings stay open as little as three days, and that operator hiring runs through Basic Operator Training (BOT) classes announced site by site. A companion page (https://www.valero.com/careers/getting-hired/recruiting-process) lists the disciplines it recruits into: chemical/mechanical/electrical/safety engineering, information services, accounting and audit, commercial supply and trading, and other corporate functions. The UK page (https://www.valero.com/careers/global-opportunities/uk-students) describes the Pembroke refinery's engineering bursary, year-long industrial placements and operations/maintenance/IT apprenticeships, where apprentices are continuously assessed via observations, assignments, on-the-job reports and examinations, and placement students are fed into the graduate selection process on the strength of their placement feedback.
After the initial online application the candidate was emailed a follow-up 'secondary application' to complete, and posted asking whether everyone gets it or only people who cleared the earlier screening steps.
Covered · Shift availability
2
Operator battery/aptitude testOnline assessment
The candidate was then selected to sit Valero's operator battery/aptitude test for the Refinery Operator Trainee role and went looking for guidance on what it covers. They did not report the contents or their result.
The candidate was selected for the interview stage of the Operator Trainee process and asked the subreddit what the interview involves; a follow-up post a week later confirms an in-person interview was scheduled. They never posted what was asked or the outcome.
What is the interview process like at Valero Energy?
Valero's own hiring guidance says candidates may be screened by phone, video or on site, that most questions are behavioral, and that some roles require a test before an interview is scheduled. The only first-hand public accounts we could actually read are from US refinery Operator Trainee candidates, who describe an online application followed by a secondary application questionnaire, then an aptitude/battery test, and only then an interview invitation. No public first-person account we could reach described the interview rounds themselves in any detail.
What topics does Valero Energy test in interviews?
Commonly reported topics include Behavioral, Aptitude.
These guides summarize public, first-hand interview experiences shared by candidates. They describe the shape of each loop and the topics that came up, not a leaked question bank, and every experience links back to its original source. Processes change often; treat this as directional prep, not a script.