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Fermilab Interview Questions
& Process

Real candidates share what happened, how many rounds they had,
and how the experience turned out.

Based on 38 interview experiences · FREE TO READ

1.9 Rounds average
Average Typical difficulty
78.9% Positive experience

Which role are you interviewing for?

20 roles · 38 reports

Candidate interview experiences

First-hand accounts from people who interviewed at Fermilab.

Showing 4 of 38
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Intern

Research · a year ago

Intern Average Positive experience No offer 1 round
Interview process
Recruiter call Technical screen
Interview formats
Behavioral Technical

I interviewed via Zoom with a group of researchers leading the project, it wasn't a one-on-one thing. It was short, mostly asking about past experiences. I made sure to prepare some questions for them about the research projects and the facilities. They seemed really interested in my coding abilities and any previous work I'd done with different software and programming languages. Just a heads up, getting an interview doesn't guarantee you'll get the job.

Confirmed questions4 questions
  • Tell me about your skills and knowledge related to this role.
  • What research experience do you have?
  • Describe your coding skills.
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Staff Electrical Engineer

Engineering · more than a year ago

Staff Difficult Neutral experience Accept offer 1 round
Interview process
Recruiter call Technical screen Presentation Panel
Interview formats
Technical Presentation Behavioral Coding

The interview was on Zoom. I felt a bit nervous, so I don't think it went as well as it could have. This was the only interview round; I didn't even have a phone call with the recruiter. It was a panel interview with about 6 or 7 people, mostly engineers but at least one physicist. The first part involved a technical presentation on a topic related to the job requirements, which wasn't too hard and didn't get many questions. The second part was behavioral, focusing on real-world experiences rather than hypothetical responses. I wasn't prepared for this and didn't have specific situations ready, which made it tough. They asked some technical questions that were challenging mainly because they were fundamental and required recalling college-level knowledge. The overall interview was quite difficult, and I didn't appreciate the formal, round-robin format with pre-written questions. It felt more like an interrogation than a conversation, with little spontaneous discussion.

Confirmed questions2 questions
  • Could you explain the distinction between FIR and IIR filters?
  • When is it more practical to opt for an analog filter compared to a digital one, or the other way around?
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Engineer

Engineering · more than a year ago

Entry Easy Positive experience Accept offer 2 rounds
Interview process
Recruiter call Phone screen Take home Technical screen Onsite Presentation Background check Offer
Interview formats
Behavioral Technical Presentation

I submitted my application online and heard back a few weeks later to set up a phone interview. This call lasted about 20-30 minutes and included three managers who introduced themselves, talked about their roles at the lab, and the potential projects I'd work on. I noted their names to send thank-you notes. The main questions were about my motivation for the role and details on my senior engineering project. I asked some questions, thanked them, and the call concluded. A few days later, I was contacted to schedule an on-site interview. Fermilab handled my travel and accommodation. I was also asked to prepare a 20-minute presentation on my senior engineering project. On the interview day, I was picked up from my hotel and taken to Wilson Hall HR. After receiving my schedule, I met with the HR representative who had initially called me. The rest of the day involved 30-minute to 1-hour interviews with various engineers and managers in a relaxed atmosphere. My presentation was scheduled for mid-day in a conference room. Despite it being a long day, I made sure to record everyone's name to send thank-you emails the next day. A few days post-interview, I received a job offer from one of the managers.

Confirmed questions2 questions
  • Could you explain your reasons for wanting this job?
  • Tell me more about your senior engineering project.
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Procurement Specialist

Operations

Mid Difficult Negative experience No offer 1 round
Interview process
Recruiter call Panel Background check Offer
Interview formats
Behavioral Group

This was a Zoom panel interview for a procurement specialist position. It was set up with four panelists, but a HR rep joined too on the day. The focus here is on two panelists. They acted improperly and were intolerant. Whenever someone spoke, their video showed up center screen. Right after I finished answering, and before either of the two would talk, I saw them laughing, smiling, rolling heads, eyes darting around. They were clearly texting, messaging, or emailing each other while I was talking. Who does that in a formal interview?

Confirmed questions1 question
  • The invitation mentioned this was a behavioral interview.

Fermilab Interview Questions

Quoted word for word from Fermilab interview reports.

What formula could be used to calculate the pressure drop in a pipe?

Read reports

Which mode of heat transfer is most affected by temperature?

Read reports

When is it more practical to opt for an analog filter compared to a digital one, or the other way around?

Read report

Could you explain the distinction between FIR and IIR filters?

Read report

Could you explain what a pipe is and how it's utilized?

Read report

Considering a concrete dam design with a river flowing left to right, would you opt for a concave, convex, or flat shape and what's your reasoning?

Read report

How do you verify that a program has all the necessary libraries prior to its implementation?

Read report

Formats, difficulty and experience

Across all 38 Fermilab interview reports.

Interview formats

Behavioral 49.3%
Technical 32.9%
Presentation 9.6%
Group 4.1%
Coding 2.7%

Interview difficulty

Easy 15.8%
Average 55.3%
Difficult 28.9%

Candidate experience

Positive 78.9%
Neutral 13.2%
Negative 7.9%

Reports by job function

Engineering 16
Operations 7
Research 6
Other 6
HR 1
Marketing 1