Why pre-screen technical illustrators before the portfolio review
This is not decorative work. If a step is drawn in the wrong order or a fastener is shown the wrong way round, the customer follows it and something breaks. Illustrators worth hiring verify against the actual product or model and have had an error caught. A short screen asks about one, which portfolios never show and which separates technical work from illustration generally.
What actually matters when screening Technical Illustrator candidates
- 01
Portfolio
Review exploded views, cutaways and illustrated parts catalogues in their portfolio; ask which were built from STEP or SolidWorks data versus drawn from photos and physical teardowns.
- 02
Craft and rationale
Test line weight hierarchy, callout and leader conventions, view selection and standards command: ASME Y14.5, ATA iSpec 2200, S1000D CGM output, ISO 128 projection choices.
- 03
Feedback and iteration
Probe how they handle engineering redlines, SME markups and late ECO changes; ask about rework cycles when part geometry or torque sequences changed mid-project.
- 04
Working with the brief
Assess how they extract intent from incomplete specs: interviewing design engineers, reading assembly procedures, resolving conflicts between the written step and the physical hardware.
Pre-screening questions to ask Technical Illustrator candidates
12 questions grouped by what they test. Ask the same set in every screen and score answers on a consistent scale, or send them as an async video screen and compare answers side by side.
Used in documentation
3 questions01What types of technical illustrations are you most experienced with?
Listen forSpecific documentation types such as exploded views, schematics or assembly sequences, with examples.
General illustration experience presented as technical work, or no documentation output described.
02Have you created illustrations for engineering or manufacturing use?
Listen forWork produced from engineering data with the conventions of the industry followed correctly.
Illustrations drawn from photographs alone, or drawing conventions not known for the sector.
03Can you discuss a project where your illustrations improved a product's usability?
Listen forA measurable result such as fewer support calls or assembly errors after the documentation changed.
Improvement claimed with no evidence, or no contact with how the documentation was actually used.
Accuracy verified
4 questions04What techniques do you use to ensure technical accuracy?
Listen forVerification against the model or physical part, with engineering review built into the process.
Accuracy assumed from source material, or no review step before publication.
05Do you have experience working directly with engineers or technical staff?
Listen forQuestions asked of engineers as a matter of routine, with ambiguity resolved rather than interpreted.
Ambiguous source material interpreted without asking, or engineers treated as unavailable.
06What is your process for turning complex information into a clear visual?
Listen forDetail removed deliberately so the important element is visible, with the decision explained.
Everything included at full detail, or simplification that removes information the reader needs.
07Can you describe a time when your illustration simplified a complex concept?
Listen forA specific example with what was cut and what was emphasised, and evidence it worked for readers.
Clarity claimed with no reader evidence, or simplification that introduced an inaccuracy.
Works to a system
2 questions08Have you worked within a company's style or branding guidelines?
Listen forStyle systems followed consistently, with reusable components built so a set stays coherent.
Each illustration drawn independently, or guidelines treated as a constraint to work around.
09How do you ensure consistency across a large set of illustrations?
Listen forTemplates, shared symbols and defined line weights used, with an audit before the set is delivered.
Consistency checked by eye at the end, or line weights and angles varying across a set.
Changes absorbed
3 questions10Have you had an illustration misunderstood, and how did you handle it?
Listen forThe misunderstanding treated as a design problem to fix rather than a reader failing.
Confusion attributed to readers, or no illustration that has ever been misread.
11How would you handle major changes partway through an illustration project?
Listen forFiles structured so changes can be absorbed, with the effect on schedule communicated immediately.
Changes requiring a complete redraw, or schedule impact absorbed silently and then missed.
12How familiar are you with producing instruction manuals and assembly guides?
Listen forStep sequencing understood from the user's perspective, with orientation kept consistent between steps.
Steps drawn from the designer's viewpoint, or orientation changing without warning between steps.
How to score responses
Score every candidate on the same four criteria immediately after the screen. At this stage you are shortlisting for panel interviews, not making the final call.
Portfolio
35%5Shows multi-sheet assembly sequences, IPC figures and wiring schematics, naming the source CAD, the manual they shipped in, and the audience.
Craft and rationale
25%5Explains why a particular section view, break line or profile weight was chosen, and how vector output stayed legible at print and tablet scale.
Feedback and iteration
25%5Describes rebuilding illustrations from revised CAD without starting over, using layered source files and version control to absorb repeated engineering changes.
Working with the brief
15%5Questions ambiguous procedures before drawing, flags discrepancies back to engineering, and delivers to publication deadlines within Isodraw, Illustrator or DITA pipelines.
A step drawn in the wrong order costs a support call per unit. A one-way video screen asks how they verify.
Try it on HirevireScreening FAQ
Process basics
How long should a pre-screening round for this role take?
Fifteen minutes across eight to ten questions, answered async, alongside a portfolio. Enough to establish published documentation work, test accuracy practice, and check how revisions are handled.
What should I ask for alongside the screen?
Illustrations from real manuals or documentation rather than portfolio pieces. Published work shows they can hold a style system and deliver to a documentation deadline.
Evaluating answers
What is the strongest signal when screening this role?
An illustration that was wrong and how it was caught. Illustrators with documentation experience have one. Anyone whose work has never contained an error has not had it checked properly.
How do I judge their accuracy practice?
Ask how they verify what they draw. Real answers involve the model, the part or an engineer's review. Anyone drawing from photographs alone will get orientation and hidden detail wrong.
Go deeper on this role
Sanat has been hiring since 2012 and watching the recruitment industry change up close ever since, and turned that screening process into Hirevire's video screening platform. LinkedIn
