Resident Engineer

Ryan Mahoney

Why this role is hard · Ryan Mahoney

The real challenge in hiring an associate resident engineer is finding the kind of steady judgment that actually keeps a depot running. You will meet candidates who can quote every charging standard from memory but completely stall when a cable tray blocks a scheduled test. Good engineers listen to contractors, call out voltage drops that fall outside tolerance, and handle their own paperwork instead of waiting for a senior engineer to push them. We look for people who can safely sign off on small field tweaks but know exactly when to flag a design clash before the bus fleet shows up. Without that mix of sharp technical sense and clear communication, the whole commissioning timeline falls apart.

Core Evaluation

Critical questions for this role

The competency and attitude questions below are where the hiring decision is made. They run in the live interview rounds and are calibrated to the level selected above.

18 Competency Questions

1 of 18

  1. Discipline

    Electric Transit Infrastructure & Charging Systems

  2. Job requirement

    Battery Thermal Management & Safety Systems

    Conducts routine battery pack inspections, thermal sensor calibrations, and assists in safety documentation and compliance tracking.

  3. Expected at Junior

    Routine inspections and safety documentation require basic working proficiency to ensure zero safety incidents and reliable hazard recognition.

Interview round: Hiring Manager Technical Deep Dive

Describe an instance where you performed scheduled safety system inspections on battery enclosures. How did you record and communicate your findings?

Positive indicators

  • References specific SOP sections or checklists
  • Mentions timestamping and version control of logs
  • Describes clear escalation paths for anomalies

Negative indicators

  • Adapts SOPs based on personal preference
  • Cannot recall how non-conformances were documented
  • Misses scheduled inspection windows without explanation

15 Attitude Questions

1 of 15

Accountability Mindset

A cognitive and behavioral orientation characterized by proactive ownership of decisions, actions, and their downstream consequences. It entails prioritizing long-term project integrity, safety, and contractual fidelity over short-term expediency, transparently addressing errors without deflection, and continuously aligning personal and team conduct with established professional, ethical, and operational standards.

Interview round: Hiring Manager Technical Deep Dive

You realize halfway through a shift that a minor field deviation you logged earlier lacks the precise measurements needed for compliance. What is your next step?

Positive indicators

  • Immediate return for missing data
  • Proactive log update before submission
  • Transparent communication to senior staff
  • Preventive checklist adjustment

Negative indicators

  • Estimates missing measurements instead of verifying
  • Submits incomplete logs with placeholders
  • Delays correction until senior review
  • Ignores the missing data as non-critical

Supporting Evaluation

How candidates earn the selection conversation

The goal is to reduce effort for everyone by collecting more useful signal before adding more interviews. Lightweight application prompts and structured screens help the panel focus live time on the candidates most likely to succeed.

Stage 1 · Application

Filter at the door

Runs the moment a candidate hits Submit. Disqualifying answers end the application; everything else is captured for review.

Video-Response Questions

1 of 2

Application Screen: Video Response

Describe a scenario where a contractor or utility partner pushed to bypass a mandatory safety or quality checkpoint to meet an accelerated deadline. What specific steps would you take to communicate the non-negotiable boundary, address their operational constraints, and secure their commitment to the correct sequence without derailing the project timeline?

Candidate experience

REC
0:42 / 2:00
1Record
2Review
3Submit

Response time

2 min

Format

Recorded video

Stage 2 · Resume Screening

Read the resume against fixed criteria

Reviewers score every application that clears the door against the same criteria. Stronger reviews advance to live interviews; weaker ones are archived without further screening.

Resume Review Criteria

8 criteria
Resume evidence of conducting routine subsystem inspections, recording technical metrics, and maintaining audit-ready documentation using standardized checklists and reporting software.
Resume evidence of cross-referencing approved schematics, electrical codes, and site drawings to validate configurations and logging written rationale for minor adjustments.
Resume evidence of participating in joint technical walk-throughs and troubleshooting sessions with contractors, OEM engineers, and transit inspectors to resolve field issues.
Resume evidence of enforcing safety standards, conducting safety walkthroughs, and maintaining compliance records for dispute resolution and audit readiness.

Is the resume complete, well-organized, and free from formatting, spelling, and grammar mistakes?

Does the resume show relevant prior work experience?

Does the cover letter or personal statement convey clear relevance and familiarity with the job?

Does the resume indicate required academic credentials, relevant certifications, or necessary training?

Stage 3 · During Interviews

Where the hire is decided

Interview rounds use the competency and attitude questions outlined above, then add tests, work simulations, and presentations that reveal deeper evidence about how the candidate thinks and works.

Presentation Prompt

Walk us through how you would approach verifying a contractor's conduit routing and trench backfill against approved electrical site drawings when you discover a minor deviation that falls within spec tolerances but triggers a safety concern from a junior field technician. Discuss the steps you would take to validate the issue, document your findings, and communicate your decision to the contractor while maintaining clear professional boundaries.

Format

approach-walkthrough · 20 min · ~2 hr prep

Audience

Hiring manager, senior field engineer, and quality assurance lead

What to prepare

  • Review the hypothetical scenario and outline your reasoning process
  • Prepare notes on documentation standards and escalation protocols (slides optional)

Deliverables

  • A structured verbal walkthrough of your inspection, validation, and communication approach
  • Optional 1-2 slide summary of your decision framework

Ground rules

  • Focus on your reasoning and communication approach, not on producing new technical specifications
  • You may reference standard industry practices or past work you are permitted to share
  • Slides are optional; the evaluation focuses on your verbal reasoning and judgment

Scoring anchors

Exceeds
Methodically frames the problem, integrates field feedback, defines clear validation steps, and establishes precise escalation boundaries while maintaining a collaborative tone.
Meets
Identifies the deviation, follows standard inspection and documentation steps, communicates clearly with the contractor, and knows when to escalate.
Below
Skips validation, proposes unauthorized design changes, fails to document findings, or communicates ambiguously or dismissively with field staff or contractors.

Response time

20 min

Positive indicators

  • Surfaces assumptions and asks high-information clarifying questions about the deviation
  • Balances spec compliance with field safety concerns without overstepping authority
  • Outlines a clear, step-by-step validation and documentation process
  • Demonstrates calm, precise communication when addressing contractor pushback
  • Explicitly identifies escalation triggers for design conflicts

Negative indicators

  • Jumps to a solution without framing the problem or validating the technician's concern
  • Proposes unilateral design changes beyond minor field adjustments
  • Fails to address documentation requirements or audit readiness
  • Uses vague or dismissive language when discussing contractor coordination
  • Ignores safety implications in favor of schedule acceleration

Work Simulation Scenario

Scenario. You are the on-site Associate Resident Engineer for a newly energized 350kW charger zone at a municipal transit depot. During initial commissioning, the contractor reports intermittent voltage drop readings on the feeder circuit that sit just outside design tolerances. The contractor wants to proceed with load testing to maintain schedule, but the readings are inconsistent across different test runs.

Problem to solve. Determine your approach to investigating and resolving the voltage drop discrepancy. Ask clarifying questions to construct a verification plan that satisfies spec tolerances, ensures crew safety, and maintains audit-ready documentation.

Format

discovery-interview · 20 min · ~0.5 hr prep

Success criteria

  • Ask targeted questions to isolate measurement error, connection resistance, cable sizing, or utility supply variance.
  • Propose a stepwise verification sequence that respects hold points and safety protocols.
  • Articulate how findings will be documented for later audit and contractor sign-off.

What to review beforehand

  • Basic NEC voltage drop calculation principles for DC feeder circuits.
  • Standard commissioning hold points for high-power charging infrastructure.
  • Field documentation best practices for non-conformance tracking.

Ground rules

  • You are not expected to perform live calculations or produce a written report during the session.
  • Walk us through your questioning strategy, assumptions, and decision sequence.
  • You may request specific data, logs, or site conditions from the informed partner.

Roles in scenario

Marcus Chen (informed_partner, played by hiring_manager)

Motivation. Validate whether the candidate follows systematic engineering troubleshooting rather than guessing or deferring immediately.

Constraints

  • Has partial multimeter logs and thermal imaging from the conduit run.
  • Will not volunteer full schematics or test results unless explicitly asked.
  • Contractor is pressuring for same-day sign-off.

Tensions to introduce

  • Readings fluctuate with ambient temperature drops in the evening.
  • Contractor claims the variance is within 'real-world tolerance' and threatens schedule penalties if testing halts.
  • Some pull-tension logs for the feeder cables were filed late.

In-character guidance

  • Answer direct questions honestly with realistic field data.
  • Provide specific values, dates, or log references when asked.
  • Acknowledge when you don't have a piece of information and state what would be needed to obtain it.

Do not

  • Do not volunteer full circuit diagrams, test matrices, or contractor correspondence unless asked.
  • Do not coach the candidate toward a specific troubleshooting sequence.
  • Do not solve the engineering problem or approve the sequence for them.

Scoring anchors

Exceeds
Rapidly isolates variables through precise questions, constructs a risk-aware verification sequence, and explicitly ties findings to audit-ready documentation and safety gates.
Meets
Asks relevant clarifying questions, proposes a logical troubleshooting path, and acknowledges documentation and schedule constraints with reasonable boundary-setting.
Below
Relies on assumptions, misses critical safety or data-verification steps, or fails to articulate a coherent approach to resolving the discrepancy.

Response time

20 min

Positive indicators

  • Asks high-information clarifying questions about measurement methodology, ambient conditions, and connection points.
  • Surfaces assumptions about contractor data reliability and explicitly requests verification steps.
  • Structures a phased investigation that prioritizes safety hold points and documentation integrity.
  • Translates technical findings into clear next steps for field crews and audit trails.

Negative indicators

  • Guesses at root causes without asking for baseline data or test conditions.
  • Freezes under ambiguity or defaults to generic 'follow the spec' statements without operationalizing them.
  • Overlooks documentation requirements or fails to address contractor schedule pressure with boundary-setting.
  • Uses vague language that would confuse field technicians or auditors.

Progression Framework

This table shows how competencies evolve across experience levels. Each cell shows competency at that level.

Electric Transit Infrastructure & Charging Systems

5 competencies

CompetencyJuniorMidSeniorPrincipal
Battery Thermal Management & Safety Systems

Conducts routine battery pack inspections, thermal sensor calibrations, and assists in safety documentation and compliance tracking.

Designs thermal management loops, evaluates battery safety test results, and implements cooling system modifications.

Leads battery safety certification processes and develops advanced thermal runaway mitigation strategies.

Oversees enterprise battery safety policy and aligns thermal management R&D with fleet-wide risk management targets.

Charging Standards & Interoperability Compliance

Assists in testing charging connectors, verifies compliance documentation, and logs interoperability test results for hardware validation.

Conducts hands-on interoperability validation and troubleshoots communication protocol mismatches between chargers and vehicles.

Leads standards compliance audits and architects interoperability testing frameworks.

Establishes enterprise-wide compliance mandates and drives strategic alignment with evolving national charging standards.

Depot Electrical Infrastructure & High-Power Charging

Assists in site surveys, equipment installation verification, and as-built documentation for depot charging stations under supervision.

Independently engineers electrical distribution layouts, specifies high-power charging hardware, and manages vendor commissioning.

Optimizes depot power architecture for peak load management and leads complex infrastructure upgrades and grid interconnection projects.

Directs multi-depot electrification capital programs and establishes enterprise standards for charging infrastructure scalability and resilience.

Transit Energy Simulation & Optimization

Inputs route parameters into simulation tools and assists in validating model outputs against historical operational data.

Runs comprehensive energy simulations, analyzes route-specific powertrain performance, and recommends charging schedule adjustments.

Develops custom simulation models and optimization algorithms, leading integration of simulation into operational planning.

Directs enterprise energy modeling strategy and aligns simulation capabilities with long-term fleet electrification roadmaps.

Vehicle-to-Grid (V2G) & Smart Charging Integration

Monitors V2G pilot system performance and assists in data collection for smart charging algorithm tuning and grid service validation.

Configures bidirectional charging controllers and integrates smart charging software with fleet management systems.

Architects V2G deployment strategies and optimizes dynamic pricing models and grid service participation protocols.

Directs large-scale V2G commercialization initiatives and establishes enterprise energy market participation models.

Fleet Operations, Analytics & Lifecycle Management

4 competencies

CompetencyJuniorMidSeniorPrincipal
Fleet Telematics & Data Analytics

Collects and cleanses raw telematics data under supervision and assists in generating routine performance dashboards for fleet operations.

Independently configures data pipelines and analyzes vehicle performance metrics to identify operational bottlenecks.

Architects fleet analytics frameworks and leads cross-functional initiatives to integrate predictive maintenance models.

Defines enterprise-wide data strategy for transit fleets and aligns analytics investments with long-term operational goals.

Grid Integration & Utility Coordination

Supports utility application submissions and compiles load data for preliminary grid impact studies and interconnection tracking.

Coordinates with utility providers for service upgrades and conducts basic grid impact analysis and tariff evaluations.

Architects demand response and microgrid integration strategies, negotiating complex utility agreements.

Shapes regional grid-transit partnership frameworks and drives policy initiatives for large-scale electrification grid readiness.

Transit Procurement & Lifecycle Management

Assists in compiling procurement documentation, tracks asset inventory, and supports lifecycle data entry for transit assets and infrastructure.

Drafts technical specifications for transit assets, manages vendor evaluations, and tracks contract compliance.

Leads complex procurement negotiations and total cost of ownership (TCO) modeling, establishing lifecycle management frameworks.

Defines strategic sourcing roadmaps and oversees multi-year capital procurement portfolios and asset retirement strategies.

Wireless Charging & Civil/Right-of-Way Engineering

Supports site grading assessments, assists in wireless pad installation coordination, and tracks permitting documentation for transit corridors.

Designs civil layouts for wireless charging zones, manages right-of-way permits, and coordinates with municipal agencies.

Optimizes wireless power alignment and ground integration, leading complex civil infrastructure projects and multi-agency coordination.

Establishes strategic guidelines for wireless transit corridors and oversees enterprise right-of-way planning.