Ace Your Air Traffic Controller Interview
Realistic questions, expert answers, and proven strategies to help you navigate every interview scenario.
- Understand core competencies expected by FAA and ICAO
- Learn STAR‑structured answers for behavioral questions
- Practice scenario‑based technical questions
- Identify red flags and how to avoid them
- Get a ready‑to‑use practice pack with timed rounds
Technical Knowledge
During a summer rush at a busy regional airport, I was on the radar position handling a 30‑minute window where ten arrivals and eight departures overlapped.
My task was to sequence the aircraft safely, maintain required separation, and keep pilots informed while coordinating with ground control.
I used the automated conflict detection tool to prioritize sequencing, issued concise altitude and speed adjustments, and communicated updates every 30 seconds. I also briefed the ground controller on expected runway occupancy to avoid bottlenecks.
All aircraft landed and took off without incident, maintaining a 2‑minute average delay—well below the airport’s target of 5 minutes. The supervisor praised the smooth flow and my clear communication.
- What specific radar features did you rely on?
- How did you prioritize conflicting aircraft?
- Did you encounter any unexpected equipment issues?
- Clarity of the situation description
- Demonstrated use of ATC tools
- Safety focus and measurable results
- Effective communication
- Vague numbers, blaming pilots, no mention of safety
- Explain the high‑traffic scenario
- State your responsibility for sequencing
- Detail use of radar tools and concise communication
- Highlight the outcome—on‑time performance and safety
At the start of each shift, I receive a briefing on any regulatory updates or NOTAMs affecting our sector.
My responsibility is to integrate those updates into my clearance and sequencing decisions throughout the shift.
I review the briefing sheet, cross‑check the electronic flight strip system for any changes, and verbally confirm critical updates with the adjacent sectors during handover. I also log any deviations in the shift report.
During a recent shift, a new altitude restriction was introduced for a weather‑affected corridor. By applying it immediately, we avoided two potential loss‑of‑separation incidents and received commendation from the safety office.
- Can you give an example of a recent regulation change you applied?
- How do you handle conflicting information between sources?
- Awareness of regulatory process
- Proactive integration into operations
- Safety outcomes
- Saying you just ‘follow the handbook’ without specifics
- Mention shift briefing and NOTAM review
- Explain integration into daily workflow
- Provide concrete outcome
While monitoring the approach sector, I noticed two aircraft projected to converge within 2 nautical miles, below the minimum separation.
I needed to resolve the conflict before it became a safety incident.
I immediately issued a climb instruction to the higher‑altitude aircraft and a speed reduction to the lower‑altitude one, while informing the pilots of the corrective actions. I also alerted the adjacent sector to monitor for any ripple effects.
The separation was restored to 5 nautical miles within 45 seconds, and both aircraft completed their approaches safely. The incident was logged, and the conflict‑resolution procedure was later used as a training example.
- How do you prioritize which aircraft to adjust first?
- What tools assist you in visualizing the conflict?
- Speed of response
- Correct use of ATC phraseology
- Safety outcome
- Delaying action, blaming technology
- Identify the conflict detection
- State immediate corrective instructions
- Communicate with pilots and adjacent sectors
- Resulting restored separation
Safety & Decision Making
During a thunderstorm, a commercial jet reported severe turbulence and requested an immediate altitude change.
I needed to find a safe altitude that avoided both the storm cells and other traffic while keeping the aircraft on schedule.
I consulted the weather radar, identified a clear corridor at 28,000 feet, coordinated with the adjacent sector for a temporary altitude block, and issued the altitude change with a clear handoff plan.
The aircraft completed the climb without incident, avoided the turbulence, and arrived at its destination with only a 10‑minute delay. The crew praised the swift coordination.
- What information sources did you prioritize?
- How did you communicate the decision to the pilot?
- Risk assessment speed
- Use of weather data
- Clear coordination
- Indecision, lack of data reference
- Describe weather‑related pressure
- Explain decision to find safe altitude
- Detail coordination with radar and adjacent sector
- Outcome – safe passage and minimal delay
A pilot on a VFR flight entered controlled airspace without acknowledging the initial clearance to descend.
My goal was to regain compliance while maintaining safety and minimizing disruption to other traffic.
I repeated the clearance using standard phraseology, escalated to a higher‑priority instruction, and logged the incident. When the pilot still did not respond, I coordinated with the supervisor to issue a warning and, if necessary, a directive to exit the airspace.
The pilot complied on the second instruction, and no conflict occurred. The incident was documented, and the pilot received a follow‑up safety brief.
- What phraseology do you use for repeated instructions?
- When do you involve a supervisor?
- Clarity of communication
- Escalation protocol
- Safety focus
- Aggressive tone, ignoring escalation
- State the non‑compliance event
- Explain repeated clearances and escalation
- Describe coordination with supervisor
- Result – compliance achieved
During a shift change, I was responsible for the tower and approach positions, handling runway clearances and inbound aircraft sequencing.
I needed to ensure runway safety while maintaining efficient arrival flow.
I used a task‑list board, delegated routine ground clearances to the assistant controller, and focused on critical airborne sequencing. I also set short‑interval updates with the ground crew to synchronize releases.
All departures and arrivals were cleared without delay, and the runway remained conflict‑free throughout the shift change.
- How do you decide which tasks to delegate?
- What tools help you track simultaneous duties?
- Prioritization logic
- Effective delegation
- Safety outcome
- Attempting to do everything alone
- Describe dual‑role scenario
- Explain delegation and task board
- Result – smooth operation
Communication & Teamwork
A pilot reported an engine failure shortly after takeoff and needed an immediate return to the airport.
I had to convey a rapid, precise landing clearance and emergency procedures while the pilot was focused on aircraft control.
I used concise, standard phraseology: ‘Cleared to land runway 22, wind 210 at 8 knots, maintain runway heading, emergency services are on standby.’ I confirmed each element with the pilot before moving on.
The aircraft landed safely on runway 22, the emergency services were ready, and the incident was resolved without injury.
- What phraseology do you prioritize in emergencies?
- How do you verify pilot understanding?
- Clarity under pressure
- Use of standard terminology
- Pilot confirmation
- Long, ambiguous messages
- State emergency scenario
- Provide clear, concise instruction using standard phraseology
- Result – safe landing
Two aircraft were on converging paths at the same altitude in the terminal area, one from the north sector and one from the south sector.
We needed to deconflict without causing delays to either flight.
I radioed the adjacent sector, shared radar data, and we agreed to issue a slight speed reduction to the southern aircraft while the northern aircraft maintained its speed. We coordinated the timing of the adjustments to ensure separation was restored within 30 seconds.
Separation increased to the required 5 nautical miles, both aircraft continued to their destinations on schedule, and the coordination was noted as a best‑practice example in the post‑shift debrief.
- How do you maintain situational awareness across sectors?
- What documentation follows such coordination?
- Effective inter‑controller communication
- Timely resolution
- Lack of coordination, blaming other sector
- Identify cross‑sector conflict
- Explain joint decision‑making
- Result – restored separation
Night shifts often extend beyond 8 hours with low traffic volume, increasing the risk of fatigue.
Maintain high alertness to ensure safety despite reduced activity.
I follow a structured break schedule, perform brief physical stretches every hour, stay hydrated, and use a rotating task system with a colleague to vary responsibilities. I also review upcoming flight plans to keep my mind engaged.
I have completed multiple night shifts without any safety incidents and received positive feedback on my consistent performance.
- How do you handle unexpected traffic spikes at night?
- What signs of fatigue do you monitor?
- Proactive fatigue management
- Consistency
- Ignoring fatigue, no concrete strategies
- Acknowledge fatigue risk
- List break, physical, hydration, task rotation strategies
- Result – safe performance
A pilot from a non‑English speaking country reported a request for altitude change but used non‑standard phraseology.
Ensure the instruction is understood and executed safely.
I repeated the clearance using plain language and confirmed by asking the pilot to read back the instruction verbatim. I also slowed my speech, avoided idioms, and used the ICAO phonetic alphabet for critical identifiers.
The pilot read back correctly, the altitude change was performed safely, and the pilot expressed appreciation for the clear communication.
- What resources are available for language assistance?
- How do you handle repeated misunderstandings?
- Clarity, patience, use of standard read‑back
- Frustration, rushed communication
- Identify language challenge
- Use plain language, repeat, read‑back
- Result – safe execution
During a post‑shift debrief, a junior controller missed a brief loss‑of‑separation alert in the radar display.
Provide feedback that improves future performance without damaging morale.
I approached the controller privately, highlighted the specific moment, explained the impact, and suggested a checklist habit of scanning the conflict alert zone every 30 seconds. I also offered to shadow them for a shift to reinforce the habit.
The junior controller adopted the habit, and subsequent monitoring showed zero missed alerts. The relationship remained positive, and the supervisor noted the effective mentorship.
- How do you ensure feedback is received positively?
- What follow‑up actions do you take?
- Constructive tone, actionable advice
- Criticism without solution
- Describe the missed alert
- Provide balanced feedback with suggestions
- Result – improvement
During a severe weather event, two aircraft reported different emergencies: one declared a medical emergency, the other reported an engine fire.
Prioritize and manage both emergencies while maintaining overall traffic safety.
I assessed the severity, gave immediate priority to the engine fire, cleared the nearest runway for an emergency landing, and coordinated with fire services. Simultaneously, I instructed the medical emergency aircraft to hold at a safe altitude and provided a vector to the nearest suitable airport, while informing the airline medical staff of the situation.
The aircraft with the engine fire landed safely with fire services on standby, and the medical emergency aircraft reached the alternate airport without incident. Both incidents were logged and reviewed in the safety board meeting.
- How do you communicate priority to pilots?
- What documentation follows multiple emergencies?
- Prioritization clarity
- Effective coordination
- Safety outcomes
- Indecision, failure to prioritize
- Identify dual emergencies
- Explain prioritization logic
- Detail coordinated actions for each
- Result – safe outcomes
- air traffic control
- radar coordination
- flight sequencing
- conflict resolution
- ATC communication
- FAA regulations
- safety management