engineering applied scienceelectrolysishydrogen safetypem alkaline stackspower to x
Complete evaluation framework
What to assess and how to score it
Review the evidence signals before interviewing. Then use the anchored descriptions—not instinct alone—to choose the score that best matches each answer.
01
Evaluation factor
Technical depth
35% weight
Probe depth on electrolyser technology: PEM versus alkaline versus SOEC stack design, current density and cell voltage curves, balance of plant, LCOH modelling, ISO 22734 and ATEX zoning.
Evidence to listen for
Explains the physics or mechanism behind their work, not just the tooling
Names the standards, tolerances, and constraints they designed against
Can defend a design decision under follow-up questions
Distinguishes what they personally engineered from what the team delivered
Five-point scoring guide
1
Poor
Cannot explain the fundamentals of their own stated specialism.
2
Needs Improvement
Knows the vocabulary but not the underlying mechanism; struggles under follow-ups.
3
Satisfactory
Solid working knowledge for the role; depth thins out on edge cases.
4
Very Good
Strong command of the domain; explains trade-offs and defends decisions well.
5
Excellent
Talks fluently about stack degradation rates, specific energy in kWh per kg, and where their LCOH assumptions came from.
02
Evaluation factor
Work that shipped
30% weight
Ask which hydrogen assets they took from FEED to commissioning: MW capacity, offtake agreement, renewable PPA coupling, compression and storage, plus actual production versus nameplate.
Evidence to listen for
Names specific programmes, parts, or systems that reached production or field use
States their own scope inside the project
Can give measured outcomes: yield, cycle time, cost, failure rate
Explains what went wrong and what they changed
Five-point scoring guide
1
Poor
No delivered work; experience is coursework, lab-only, or purely observational.
2
Needs Improvement
Contributed to projects but cannot say what shipped or what their part was.
3
Satisfactory
Has delivered real work; outcomes described without numbers.
4
Very Good
Names shipped work and their scope, with some measured results.
5
Excellent
Names commissioned plants with MW ratings, availability figures, and honest gaps between design output and delivered kilograms per day.
03
Evaluation factor
Diagnosis under uncertainty
20% weight
Test how they chased faults such as membrane crossover, unexpected stack voltage drift, deioniser water quality issues, or hydrogen purity failing ISO 14687 grade specification.
Evidence to listen for
Describes a real failure they chased to root cause
Shows a method: isolate variables, reproduce, measure, eliminate
Distinguishes correlation from cause
Says what they ruled out and why, not only what the answer turned out to be
Five-point scoring guide
1
Poor
No diagnostic method; guesses or escalates immediately.
2
Needs Improvement
Trial and error with no structure; cannot explain how they narrowed the cause.
3
Satisfactory
Reasonable method on familiar problems; less structured on novel ones.
4
Very Good
Clear systematic approach with a real root-cause story.
5
Excellent
Reconstructs a purity or degradation investigation with data logs, isolated variables, and the corrective action that held over months.
04
Evaluation factor
Working across the org
15% weight
Look for work with grid operators, EPC contractors, HSE regulators, and offtakers on permitting, subsidy schemes (RED III, 45V, hydrogen contracts for difference), and safety cases.
Evidence to listen for
Explains technical constraints to non-technical stakeholders without condescension
Has negotiated scope, cost, or timeline with manufacturing, product, or suppliers
Documents decisions so others can act on them
Takes review feedback without defensiveness
Five-point scoring guide
1
Poor
Cannot communicate outside their specialism; dismissive of other functions.
2
Needs Improvement
Communication gaps cause rework; avoids stakeholder contact.
3
Satisfactory
Works adequately with other teams; documentation is thin.
4
Very Good
Communicates clearly across functions; reliable collaborator.
5
Excellent
Cites permits secured or subsidy applications won, and describes translating stack physics for financiers and planning authorities.
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