CBP Interview Perep

Question 1

Tell me about yourself

Answer 1

I’m an electrical engineer with around seven years of experience across defense and aerospace industries. I started at the Army Research Lab working on MEMS devices, which gave me hands-on fabrication and testing experience. Then I worked at Heidelberg Instruments in Germany on lithography systems. From there, I moved into circuit design at Northrop Grumman, where I developed analog and power distribution boards for spacecraft. Most recently at Airbus U.S. Space & Defense, I served as the responsible engineer for the battery. I also worked on the solar array and power conditioning and distribution. I also was able to work on the onboard computer and power systems, designing DC-DC converters and integrating avionics hardware into the flatsat environment. I’m now looking to apply that hands-on design and system integration experience to field-deployed, rugged systems like yours.

Question 2

Tell us about a project where you had to design and build a prototype quickly.

Answer 2

At Airbus U.S. Space & Defense, I helped prototype a U.S.-made onboard computer for a spacecraft. I designed a DC-DC converter starting from LTSpice simulations through schematic capture in Altium. Once the boards were fabricated, I assembled and tested them in the lab—validating performance under transient conditions. That process taught me how to move fast between design, build, and test while maintaining documentation and traceability. I really enjoy that cycle—it’s one of the most rewarding parts of engineering.

Question 3

Many of our interface circuits are fairly simple—relays, radar sensors, and GPIO control. How do you approach designing reliable circuits for outdoor use?

Answer 3

My approach starts with component derating and understanding environmental stress. In spacecraft hardware at Airbus and Northrop Grumman, we had to design for radiation, temperature swings, and vibration. Even though this environment is different, the principles are the same: use wide-temperature-range components, solid connectors, surge suppression, and EMI filtering. I’d also make sure all connectors and terminations are sealed and strain-relieved so they can handle the rugged conditions typical at border sites.

Question 4

This job involves collaborating closely with mechanical and fabrication teams. How do you ensure electrical designs are easy to assemble and service?

Answer 4

I’ve found early collaboration makes the biggest difference. At Airbus, when I integrated the AOCS components on the flatsat, I worked closely with mechanical engineers to define mounting clearances, cable routing, and connector orientation. I focus on making assemblies straightforward—labeling connections clearly, simplifying harness routing, and ensuring parts can be replaced easily in the field. Even small changes to layout or connector choice can save a lot of time during assembly.

Question 5

Can you describe a major troubleshooting challenge you faced and how you resolved it?

Answer 5

When integrating the DC-DC converter into the on board computer, our output voltage dipped below spec during startup. I reproduced the failure, captured the transient response with an oscilloscope, and discovered that the compensation network wasn’t aggressive enough. After recalculating and adjusting the compensation, the converter stabilized under load. I changed the capacitors to low ESR versions. That experience reinforced the importance of isolating variables, reproducing the issue, and validating the fix thoroughly

Question 6

You’d be the only electrical engineer on the team, mentoring a junior associate. How would you approach that?

Answer 6

I’d set up consistent design reviews and encourage the junior engineer to own small subsystems, with me providing feedback on schematics, component selection, and testing. I’ve done informal mentorship before—especially at Airbus, where I guided newer engineers during hardware integration—and I enjoy explaining the reasoning behind design decisions. I think clear documentation and collaborative design reviews go a long way in developing technical confidence.

Question 7

Tell us about a time when you had to manage multiple projects with competing priorities.

Answer 7

At Airbus, I balanced power analysis in MATLAB for one customer milestone while also supporting onboard computer R&D. I prioritized the analysis first since it was customer-facing, and then allocated time to prototype work. I kept both projects moving by time-boxing my efforts and keeping detailed daily notes. That helped me switch contexts quickly and stay on top of milestones without compromising quality.

Question 8

How do you ensure your designs are well-documented and ready for manufacturing?

Answer 8

From my Northrop Grumman experience, documentation was integral to every design cycle. I generated Bills of Materials, Electrical Stress Analyses, and Worst Case Analyses, as well as test and build procedures. I like to document iteratively—updating build and test procedures alongside schematic revisions—so that by the time fabrication starts, everything is in sync. This minimizes ambiguity for assemblers and fabricators later on.

Question 9

What tools and methods do you use for simulation and validation?

Answer 9

For circuit simulation, I use LTSpice and MATLAB for system-level analysis. For schematic and layout, I’m proficient in Altium Designer. In the lab, I rely on oscilloscopes, DMMs, power analyzers, and logic analyzers. I’m comfortable setting up test benches, capturing transient or steady-state data, and using those measurements to iterate quickly on the design.

Question 10

What do you think are the key factors for designing electrical systems that work reliably in border environments?

Answer 10

Temperature extremes, vibration, and environmental exposure are the main challenges. I’d apply the same principles used for space-qualified hardware: derate components, isolate signals, ensure solid grounding, and design for modular replacement. Using conformal coatings, sealed connectors, and surge protection helps achieve long-term reliability in harsh outdoor environments.

Question 11

What motivates you to work on this kind of national infrastructure project?

Answer 11

I’m drawn to engineering that has a tangible real-world impact. I’ve worked on spacecraft systems that operated far from Earth, and this role is similar in that the equipment has to perform reliably under tough conditions. Supporting critical U.S. infrastructure and contributing to systems that directly enhance safety and efficiency really resonates with me. Plus, I enjoy hands-on prototyping and seeing designs become real, functional systems.

Question 12

Question to ask 1

Answer 12

How does feedback from field deployments feed into new hardware iterations?

Question 13

Question to ask 2

Answer 13

What’s the typical timeline from concept to field installation?

Question 14

Question to ask 3

Answer 14

What’s been the biggest technical challenge on recent biometric or RFID systems?

Question 15

Question to ask 4

Answer 15

How closely do electrical engineers work with software or field teams during integration?

Question 16

5 skills to emphasize during the interview

Answer 16

Emphasize adaptability — each week may bring new focus areas (biometrics, RFID, cargo).

Highlight hands-on enthusiasm — you enjoy lab and prototype work.

Stress collaboration with mechanical/fabrication teams.

Mention documentation discipline and cross-functional communication.

Convey mentorship mindset for supporting junior engineers.