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
Check command of cathodic protection design: rectifier sizing, anode bed selection, IR drop correction, 100 mV polarization criteria, plus AMPP/NACE CP2 or CP3 credentials and 49 CFR 192/195 criteria.
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
Explains CP criteria and interference mitigation precisely, cites AMPP certification level, and links design choices to soil resistivity and current demand data.
02
Evaluation factor
Work that shipped
30% weight
Probe assets they have actually protected: tank bottoms, buried pipeline mileage, offshore jackets. Ask for CIS or ECDA programs run, coating specs written, and inhibitor injection rates set.
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 specific systems commissioned or rehabilitated, with survey mileage, remediation digs completed, and measurable reduction in corrosion-related leaks or wall loss.
03
Evaluation factor
Diagnosis under uncertainty
20% weight
Test how they diagnose unclear metal loss: interpreting ILI anomaly digs, distinguishing MIC from CO2 or under-deposit attack, tracing AC or stray current interference sources.
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
Walks through a real anomaly investigation, evidence weighed (coupons, bacteria cultures, potential logs), and how the root cause was confirmed rather than assumed.
04
Evaluation factor
Working across the org
15% weight
Assess how they work with operations, integrity, and inspection teams: getting rectifier repairs prioritised, justifying recoat budgets, defending findings to regulators or auditors.
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
Describes convincing operations to fund remediation, with the risk case presented and the documented outcome at the next inspection cycle.
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