How to prepare for grad school interview

por Maria Tavares (BALSA Science & Innovation)

Getting a PhD interview means that your application made an impression. Now it is time to show who you are as a researcher! Interviews are opportunities to demonstrate your passion for research, your clarity of thought, and your fit with the program. Here are some practical tips to help you prepare with confidence.

1. Understand your own research deeply

One of the most common questions is “Tell me about your work and why you did each experiment.” You should be prepared to explain:

• The broader problem your research is trying to solve. What is the important scientific question behind your project?

• The reasoning behind each experiment, not only what you did, but why each step was necessary.

• What the main results were, what they mean, and what the next steps would be if you continued the project.

• Prepare several versions of your research explanation: short (~5 min), medium (~10 min), and detailed (~30 min), and practice with colleagues or in front of the mirror!

Interviewers want to see that you understand your research at every level, from the big picture to the methodological details. Why did you choose these approaches? What could other options have revealed? How did you interpret your data?

2. Be ready to answer questions, and to ask them too

In addition to answering questions, an essential part of the interview is interacting with the people interviewing you. Study the work of the researchers you will be speaking with. You do not need to memorize every paper, but you should know the general focus of their projects.

Things you can ask:

• “What research areas is your lab most excited about right now?”

• “Are there opportunities to collaborate with other groups here?”

• “I read your paper on X and found it very interesting. Have you considered trying Y as a follow-up?”

Asking questions shows that you are thinking seriously about where and with whom you want to work, while also demonstrating enthusiasm and curiosity.

3. Do mock interviews

One of the best ways to prepare is to simulate interviews before the real one. Try doing mock interviews with your advisor, postdocs or more senior students, friends who are also applying, and people outside your field to test the clarity of your explanations. When the real interview comes, you will feel much more confident and natural.

Examples of common questions (you do not need to memorize answers, but it is important to have reflected on questions like these):

About you and your path

• What inspires you to do science?

• What does a PhD mean to you?

• Where do you see yourself after completing graduate school?

About your research

• Among all your research experiences, which one was your favorite and why?

• Tell me about a technique you used to answer a specific question.

• Describe a method that was challenging or needed optimization. How did you handle it?

• If money and feasibility were not an issue, what experiment would you do? Why? What excites you about it?

General scientific thinking

• Describe a current scientific topic, in any field, that interests you.

• How have your previous experiences prepared you for graduate-level work?

Fit with the program

• Why do you want to pursue your PhD at University X?

• What resources here are you excited to explore? Why?

These questions do not have a “right answer.” They are meant to help interviewers understand how you think, reflect, and communicate.

4. Take advantage of the BALSA community

If you are about to have a PhD interview, use the BALSA community to your advantage. Reach out through our channels, such as WhatsApp and Slack, and seek advice from people who are already pursuing a PhD, perhaps at the same institution or even in the same program. There is almost always a Brazilian who has already gone through this process and is willing to help and share their experiences. Do not hesitate to reach out! Networking is also part of scientific training!

Finally, do not underestimate the practical details! Dress professionally and comfortably, even for virtual interviews. This helps not only with the impression you make, but also with your own confidence. After the interview, send a short thank-you email to the people who spoke with you. Thank them for their time, mention something specific from the conversation that stood out to you, and reinforce your interest in the program or lab. This small gesture demonstrates professionalism, attentiveness, and genuine interest, and helps close the interview on a positive note. Above all, remember: making it to the interview is already a huge achievement. Congratulations on this step, and good luck. Trust your path, your preparation, and the scientist you already are.