OneWeb India Field Operations Engineer Interview: Rounds, Questions and Preparation

What the job involves

Field Operations Engineers in telecom and internet keep satellite and terrestrial network sites running by installing, testing, and maintaining equipment such as antennas, modems, routers, and power systems. They travel to customer sites, gateways, and remote locations to commission links, troubleshoot faults, and coordinate with network operations centers. The role blends hands-on hardware work with documentation, safety compliance, and customer communication.

Role and Technical Knowledge

1. 1

   What is the difference between a satellite link and a fiber link in terms of latency and use case?

   Mention that satellite links have higher latency, often 500 ms or more for GEO, while fiber is lower latency and higher capacity. Explain that satellite is useful for remote or maritime areas where fiber is not feasible.

2. 2

   Explain the steps you would follow to align a dish antenna for a satellite link.

   Cover site survey, compass and inclinometer use, azimuth and elevation adjustment, peaking on signal strength or SNR, and locking down bolts. Mention checking polarization and documenting final readings.

3. 3

   What is a link budget and why does it matter in field operations?

   Describe it as a calculation of gains and losses from transmitter to receiver. Explain that it helps predict whether a link will work and guides decisions on antenna size, power, and cable loss.

4. 4

   How would you troubleshoot a customer site that has no internet connectivity but the modem shows power?

   Suggest checking cable connections, link LEDs, signal strength, IP configuration, and whether the issue is local or upstream. Mention escalating to NOC with logs and test results if the problem persists.

Practical Field Scenarios

1. 5

   You arrive at a remote site and find the backup battery is dead and mains power is unavailable. What do you do?

   Prioritize safety, then assess if a generator or portable power can restore the link. Document the failure, replace or bypass the battery if allowed, and inform the NOC and site owner about the temporary fix.

2. 6

   A customer complains that their internet is slow only during video calls. How would you investigate?

   Check for packet loss, jitter, and latency using ping and traceroute. Verify if the issue is Wi-Fi interference, bandwidth saturation, or satellite link degradation. Suggest QoS settings or a wired test to isolate the cause.

3. 7

   You need to install a new antenna on a rooftop but the landlord denies access. What steps do you take?

   Stay calm and professional, contact your supervisor and the account manager, and explore alternative mounting locations. Document the denial and avoid unauthorized access that could breach safety or legal rules.

4. 8

   During a site survey, you notice the grounding is poor and there is a risk of lightning damage. How do you handle it?

   Note the issue in your survey report, recommend proper grounding and surge protection, and do not commission the site until it is fixed. Explain the safety and equipment damage risks to the customer or project lead.

Networking and Equipment Fundamentals

1. 9

   What is the difference between a public and a private IP address, and where would you use each in a field setup?

   Explain that public IPs are routable on the internet and private IPs are used inside local networks. Mention that customer LAN devices often use private IPs, while the satellite modem or router may have a public IP for WAN connectivity.

2. 10

   How would you test whether a cable or connector is faulty?

   Describe using a cable tester, visual inspection for bent pins or water damage, and swapping with a known good cable. Mention checking insertion loss with a power meter for RF cables.

3. 11

   What is the purpose of a spectrum analyzer in field operations?

   Explain that it displays signal strength across frequencies, helping identify interference, verify carrier signals, and confirm antenna alignment. Mention that it is used to spot unwanted noise or jamming.

4. 12

   Explain the role of a router versus a switch in a small customer network.

   State that a router connects different networks and handles IP routing and NAT, while a switch connects devices within the same network. Mention that in field setups, the router often connects to the satellite modem and the switch distributes to local devices.

Behavioural and HR Questions

1. 13

   This role requires frequent travel to remote sites. How do you feel about that?

   Show enthusiasm and readiness to travel, mentioning any prior experience with field trips or outdoor work. Be honest about constraints but emphasize flexibility and a willingness to learn.

2. 14

   Describe a time you had to explain a technical problem to someone who was not technical.

   Use a simple example from a project or lab, focusing on how you avoided jargon and used analogies. Highlight that the person understood and felt reassured.

3. 15

   Tell me about a time you made a mistake during a practical task. What did you do?

   Choose a real but low-stakes example, such as misconnecting a cable. Explain that you owned the mistake, fixed it, and learned a check or process to prevent it from happening again.

4. 16

   Why do you want to work in field operations rather than a desk-based network role?

   Talk about enjoying hands-on work, seeing the direct impact of your efforts, and liking variety in locations. Connect it to a desire to build practical skills in telecom and satellite systems.