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Brewery worker interview questions, and what the head brewer is listening for

A brewery interview is rarely formal. It's often a head brewer or production manager walking you through the cellar, asking questions between the fermenters, and watching whether you notice the hose left on the floor. They're hiring someone to clean well, lift safely and not ruin a batch, so most questions circle back to those three things.

12 questions6 minute read

Part 1

1.Walk me through how you'd clean and sanitize a fermenter after it's emptied.

Why they ask

Cleaning is most of the job, and a sloppy clean can infect every batch that goes into that tank next.

How to answer

  • Rinse out yeast and hop debris first, then open the valves and blow-off
  • Run hot caustic through the spray ball on a CIP loop for the set time
  • Rinse, then run an acid rinse to remove beer stone and passivate the steel
  • Sanitize with peracetic acid or the brewery's chosen sanitizer just before filling
  • Log each step and check gaskets and the manway seal while it's open

2.What's the difference between cleaning and sanitizing?

Why they ask

It's the quickest test of whether you understand why the procedures exist.

How to answer

  • Cleaning removes soil, protein and beer stone you can see and some you can't
  • Sanitizing kills the microbes left on a clean surface
  • Sanitizer doesn't work on a dirty surface, so the order matters

3.Why does oxygen matter after fermentation, and how do you keep it out?

Why they ask

Oxygen pickup during transfers, dry hopping and packaging stales beer fast, especially hoppy beer.

How to answer

  • Oxygen makes beer taste papery and dulls hop aroma within weeks
  • Purge hoses and tanks with carbon dioxide before a transfer
  • Push beer from the bottom and avoid splashing
  • Watch dissolved oxygen readings on the canning line and flag high ones
4.A fermenter you checked this morning reads warmer than it should and the gravity hasn’t moved since yesterday. What do you do?

Why they ask

Morning cellar readings are often the new hire’s job, and a stalled or hot fermentation left alone can turn a whole tank into drain beer.

How to answer

  • Check the reading again with a fresh sample so you know it’s real
  • Look at the glycol panel and the tank jacket valve for an obvious cause
  • Tell the head brewer right away instead of adjusting temperatures on your own
  • Write the readings and what you saw in the batch log
5.The seamer starts throwing bad lids halfway through a canning run. What do you do?

Why they ask

Packaging breakdowns happen every week, and they want to know you'll stop bad product instead of letting it pile up.

How to answer

  • Stop the line or call the line lead right away
  • Pull and set aside every can since the last good seam check
  • Don't try to adjust the seamer yourself unless you've been trained on it
  • Keep the rest of the line ready so the restart is quick

Part 2

6.Have you worked with caustic or acid cleaners before? How do you handle them?

Why they ask

Chemical burns are one of the most common brewery injuries.

How to answer

  • Name the protection you wear: goggles or face shield, chemical gloves, boots
  • Know where the eyewash station and the safety data sheets are
  • Add chemical to water, never the other way around
  • Never mix caustic and acid, and rinse between them
7.What would you check before going into a tank or leaning into a manway?

Why they ask

Tanks can hold carbon dioxide that isn't safe to breathe, and people have died this way in breweries.

How to answer

  • Never enter without following the brewery's confined space procedure
  • Make sure the tank is vented, depressurized and locked out
  • Use a gas monitor and have someone watching from outside
  • Say plainly that you'd ask before entering if you weren't sure
8.Tell me about beers you like and what you taste in them.

Why they ask

They want to know you can describe flavor, because you'll sit on tasting panels and flag off-flavors in tanks.

How to answer

  • Pick a real style and describe it in plain flavor words
  • Name an off-flavor you can recognise, like diacetyl or oxidation
  • Show curiosity about their beers, not just the trendy ones
9.Are you comfortable on a forklift and lifting full kegs all day?

Why they ask

Kegs, malt bags and pallets are the daily workload, and they need to know you won't get hurt in week one.

How to answer

  • Say whether you hold forklift certification or are willing to get it
  • Describe how you lift a full keg: legs, not back, and use the dolly
  • Mention past work with pallet jacks, stacking or loading trucks
10.Tell me about a time you made a mistake at work. What happened next?

Why they ask

In a brewery, a hidden mistake like a skipped rinse can cost a whole batch, so honesty matters more than a clean record.

How to answer

  • Pick a real mistake with real consequences
  • Say how quickly you told someone
  • Explain what you changed so it didn't happen again

Part 3

11.Our schedule moves around. Can you work early mornings, weekends and long packaging days?

Why they ask

Fermentation doesn't wait for weekends, and packaging runs sometimes stretch late.

How to answer

  • Be honest about what you can and can't do
  • Mention any past job with early starts or rotating shifts
  • Ask how the schedule is set and how much notice you get
12.Why do you want to work in a production brewery rather than behind a bar?

Why they ask

Plenty of applicants love beer but aren't ready for the wet, repetitive side of making it.

How to answer

  • Say you know most of the job is cleaning and moving product
  • Explain what draws you to the process, like yeast or packaging quality
  • Connect it to a goal, such as becoming a cellar lead or assistant brewer

Questions to ask them

Ask at least two. It shows you're picking them too.

  • How is the work split between cellar, brewhouse and packaging, and would I rotate?
  • What training do you give on chemicals, the canning line and confined space entry?
  • What does it take here to move up to assistant brewer?
  • What does a normal packaging day look like, and how often does it run late?
  • How do you run sensory checks, and would I be on the tasting panel?
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