Wind turbine technician screening questions: GWO training, WINDA checks, climbing, travel and uptower troubleshooting
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Wind turbine technician screening questions should confirm current Global Wind Organisation (GWO) safety training, checked in WINDA, then how much real uptower time the candidate has, on which turbine platforms, doing which work (scheduled maintenance, troubleshooting, main component exchanges or construction), and whether they accept the travel and site schedule. Ask for the last fault they traced uptower and how they isolated the energy before they touched it. Many employers ask for GWO training, but as of October 2026 GWO itself says its basic technical courses do not make anyone a trained person who may do the work unsupervised.
This page is specific to wind. For rooftop and ground-mount solar crews, use solar installer screening questions; for substation and collection-line work, see electrical lineworker screening questions. Plant technicians who maintain equipment indoors are covered in maintenance technician screening questions.
Which wind technician job is this?
| Type | What the work usually involves | Ask the candidate |
|---|---|---|
| Site-based service technician (onshore) | Scheduled maintenance, troubleshooting and repairs at one wind farm, on-call rotation | "Which turbine platforms were at your site, and how many did your team cover?" |
| Traveling technician | Campaigns across sites: retrofits, inspections, bolt torque, major repairs; long stretches away | "How many weeks a year were you on the road, and what campaigns did you work?" |
| Construction and commissioning | Tower, nacelle and blade installation with crane crews, cable terminations, energization and commissioning tests | "Which part of the build did you do, and who signed off commissioning?" |
| Blade technician | Rope access or platform work on blade inspection and composite repair | "Which rope access certification and level do you hold, and what repairs did you do?" |
| Offshore technician | Vessel or helicopter transfer, longer rotations, sea survival training | "What rotation did you work, and how did you transfer to the turbines?" |
The Bureau of Labor Statistics' Occupational Outlook Handbook (page updated August 27, 2026) notes that technicians typically attend technical schools or community colleges, then receive employer- or manufacturer-provided training; that towers may be 200 feet or higher; and that offshore work can mean days or weeks away from home.
Which training and credentials should a wind technician have?
| Credential | What it is | What to ask |
|---|---|---|
| GWO Basic Safety Training (BST) | GWO's BST standard has modules in first aid, manual handling, fire awareness, working at height and sea survival, each with initial and refresher courses. Sea survival is for offshore work. | Which modules, the dates, and the WINDA ID. |
| GWO Basic Technical Training (BTT) | The BTT standard covers basic hydraulic, mechanical, electrical, bolt tightening and installation tasks. GWO says these courses do not make a participant a trained person who may do that work without supervision. | Which modules, and what they did after the course under supervision. |
| Other GWO standards | GWO also publishes Advanced Rescue Training and High Voltage standards that some employers require for specific roles. | Only if the client lists them. |
| Employer and manufacturer training | Turbine-platform training, the employer's electrical safety program (often built on NFPA 70E) and its energy control procedure under OSHA's lockout/tagout standard. | Which platforms they were trained on, and their qualified level for electrical work. |
Verify GWO training in WINDA, GWO's training records database. The employer creates an organization profile and the technician shares their WINDA ID. GWO says training completed before October 17, 2016 is not in WINDA, so older certificates are checked on paper from the training provider.
Knockout questions
| Question | What a strong answer sounds like | Red flags |
|---|---|---|
| Which GWO modules do you hold, when do they need refreshing, and can you share your WINDA ID? | The modules, the dates and the ID, offered without hesitation. | "My certs are with my old employer." No WINDA ID. |
| How many months have you worked uptower, and on which turbine platforms? | A number, the manufacturer and model family, and the site. | Only classroom or tower-trainer time, for an experienced-tech order. |
| The role involves climbing [example: an 80-meter tower with or without a climb assist], working in the nacelle and hub, and carrying tools. Can you perform those duties, with or without accommodation? | Yes, and often a detail from past climbs. | None from the answer. Do not follow up with medical or weight questions before an offer. |
| The schedule is [example: four tens on site with on-call] or [example: 75 percent travel]. Does that work? | A plain yes, or a specific limit said now. | Agrees, then asks to stay home weekly on a traveling role. |
| You would drive to [remote sites] in [a company truck / your own vehicle]. Is your driver's license current? | Yes, with any restriction that matters mentioned now. | Unsure; the client's driving record check will settle it. |
Uptower work and troubleshooting questions
-
"Tell me about the last fault you traced uptower, from the alarm to returning the turbine to service."
- Strong answer: the alarm and its history in the monitoring system, the checks from the ground, the climb, the energy isolation, the measurements that found the cause (a pitch system fault, a converter or sensor problem), the fix and the test run.
- Red flags: "We reset it." Every story ends with the lead finding the problem.
-
"What does a scheduled maintenance visit on your last platform involve, and how long did it take?"
- Strong answer: the checklist areas (torque checks, lubrication, filters, inspections), how the team split the work and the time per turbine.
- Red flag: cannot describe the order of work.
-
"How do you isolate the turbine before you work on the electrical system or enter the hub?"
- Strong answer: follows the site's energy control procedure: stops and locks the rotor, locks and tags the electrical and hydraulic energy sources, verifies zero energy, and confirms with the site before entering the hub.
- Red flags: "The rotor lock is enough." No mention of verifying.
-
"Have you worked a main component exchange with a crane, and what was your role?"
- Strong answer: the component, rigging and tag lines, communication with the crane operator, the torque sequence on reassembly.
- Red flag: describes watching from the ground as doing the exchange.
Rescue, weather and teamwork questions
| Question | What a strong answer sounds like | Red flags |
|---|---|---|
| What is in your pre-climb check of the harness and fall arrest equipment? | A sequence: harness, lanyards, connectors, the fall arrest device and the ladder system, with the inspection record. | "It looked fine." |
| Your partner is injured in the nacelle. What happens next? | Follows the site emergency plan, calls it in, uses the rescue kit they trained on, knows who descends first. | Has never practiced a rescue. |
| When do you stop work for weather? | Knows the site's wind speed and lightning limits and stops without arguing. | Pushes to finish before the wind picks up. |
| Tell me about a time you stopped a job because something was unsafe. | A specific example and what happened after. | Has never stopped a job. |
How does wind experience get overstated?
- Training as experience. BST and BTT completed last month, described as being a technician. GWO itself says BTT does not qualify anyone to work unsupervised.
- Construction as service. Bolting towers with a crew is different from troubleshooting a running turbine. Ask what share was service.
- Platform claims. "Worked on" a turbine model during one campaign. Ask how many turbines and what they did on them.
- Ground support as uptower time. Ask how many climbs in a typical week.
- Expired refreshers. Certificates that lapsed. WINDA shows the status; check it.
Scoring
Knockouts are pass or fail. Score the rest 0 to 2 so every technician on the order is compared the same way.
Pass or fail
- GWO training the client requires, current in WINDA (or the client trains new hires).
- Uptower experience at the level the order needs.
- Can perform the climbing and physical duties, with or without accommodation.
- Accepts the travel, schedule and driving.
Scored, 0 to 2 each (10 possible)
- Platform match with the client's turbines.
- Troubleshooting method in the uptower fault story.
- Energy isolation and electrical safety habits.
- Rescue readiness and equipment checks.
- Stop-work judgment and teamwork.
General information, not legal advice. Under the EEOC's guidance on pre-employment disability-related questions, medical questions and examinations generally wait until after a conditional offer, and then apply to everyone entering the same job. Before an offer, describe the duties and ask whether the candidate can perform them, with or without accommodation. Ask about pay expectations, not pay history.
The interview guide for utility roles shows how to add a practical step after the screen. Turbine models, WINDA IDs and refresher dates are easy to mix up across a day of calls with technicians on site. Interview Signal keeps the knockout questions pinned until you ask them and writes the notes from what each technician said, with the transcript kept on your own computer.
Questions people ask
What GWO training should a wind turbine technician have?
Employers that require GWO training usually start with the Global Wind Organisation's Basic Safety Training, whose modules cover first aid, manual handling, fire awareness, working at height and, for offshore work, sea survival, each with initial and refresher courses. Many also ask for GWO Basic Technical Training in mechanical, electrical, hydraulic, bolt tightening and installation tasks. Check the client's list, since requirements differ between onshore and offshore work.
How do I verify a wind technician's GWO certificates?
Use WINDA, GWO's training records database. An employer creates an organization profile and the technician gives you their WINDA ID, which lets you see the status and validity of their GWO courses. GWO says training completed before October 17, 2016 is not in WINDA, so older certificates have to be checked on paper from the training provider.
Can I ask a wind technician candidate about their weight or fitness for climbing?
Before an offer, describe the job's physical demands, such as climbing a tower ladder, working in confined spaces and carrying tools, and ask whether the candidate can perform them, with or without accommodation. Under the EEOC's ADA guidance, medical questions and examinations, including climb assessments that work as medical tests, generally wait until after a conditional offer and must apply to everyone in the job category. This is general information, not legal advice.