Interview Questions to Ask a Welder Candidate
Questions that surface real evidence of certified technique and weld quality, verifiable through inspection results — plus what to actually listen for in the answer, not just whether they say the right buzzwords.
1. How do you choose a welding process and settings for a new joint on thicker steel?
What to listen for: Understanding of material, joint design, process choice, heat input, and reference to the weld procedure specification.
2. A weld fails visual inspection with undercut. What do you do?
What to listen for: Identifying causes such as travel speed, current, or angle, repairing to the standard, and re-inspecting.
3. How do you protect yourself and others from fumes, arc flash, and fire when working in a confined area?
What to listen for: Ventilation, appropriate PPE, fire watch, screens, gas checks, and permit systems where required.
4. You are told to weld a repair but you do not have a qualified procedure for that material. What do you do?
What to listen for: Refusing to guess, asking a supervisor or welding engineer, and knowing that unqualified work can fail dangerously.
5. What would you do in your first 30 days in this welder role?
What to listen for: Whether their plan is grounded in the role's actual must-haves (mig/tig/stick welding and blueprint and weld-symbol reading) or generic ("get to know the team"). Specificity here signals real understanding of the job, not just interview prep.
6. Why are you leaving your current role, and why this one specifically?
What to listen for: Forward-looking motivation tied to something concrete about this role, versus badmouthing a past employer or vague dissatisfaction. Watch for whether their reasons actually match what this role offers.
A warning sign in this interview
The candidate brags about speed or appearance of beads but ignores procedures, inspection results, and fume or fire safety.
What to look for on the CV before the interview
Certifications, processes and materials welded.
Confirm before you make an offer
The welding certifications for the processes and materials the work needs, and any test the employer runs.
People who may apply under another title
This job is also called Fabricator, Welder Fitter, Pipe Welder, MIG Welder. A candidate with one of those titles can be a strong match, so ask the same questions and judge the answers, not the title.
Frequently asked questions
How many of these questions should I ask in one interview?
3-4 is realistic for a 30-45 minute interview once you leave room for follow-ups and the candidate's own questions. Divide competencies across panel members rather than every interviewer asking all of them — see the Interview Scorecard tool for a structured version of this.
How is this different from the Interview Scorecard tool?
This page is a generic starting point for the welder role. The tool generates a full panel-ready kit — competency-grouped questions, a 1-5 rating rubric, and strong/weak answer examples — tailored to your actual job description and competencies.
What is a red flag when interviewing a welder?
The candidate brags about speed or appearance of beads but ignores procedures, inspection results, and fume or fire safety.
What should I confirm before offering a welder the job?
The welding certifications for the processes and materials the work needs, and any test the employer runs.
Hiring a welder? The rest of the toolkit
- How to write the job description →
Titles, must-haves, credentials and a starting posting.
- Search strings to find candidates →
Five searches from broad to narrow, with exclusions.
- Run the whole hire in one place →
Jobs, CV review, interviews, offers and checks together.