I had a second-round of interviews with multiple people interviewing me at the same time. How should I handle this?

Just go in with confidence and keep it professional. Just breathe and take it one step at a time.

I don't know, sorry. Only had one interview.

Be direct, act professionally, let your interviewers do the ralking

Must face them with fullest of your abilities.

Stay confident and relaxed

If the same person is interviewing you twice, let them set the stage. Obviously you're doing well, or you wouldn't have gotten the second round. -- Perhaps they wanted to dive in deeper to get a better gauge of your skills or your team fit. -- Perhaps they have multiple roles at their company and will be evaluating you against different criteria. -- At any rate, do your best, and use this time to your advantage, continue to build a relationship and rapport with these individuals. -- Keep in mind, they have probably had a sync with each other since your last interview -- so definitely spend your in-between time studying up on anything you didn't ace the first time through. :-)

Doesn't matter if it is one or multiple, be honest & answer the questions to the best of your ability & what you don't know/are not sure about point out that you are willing to learn.

Inform both companies that you have interviews with another company. You’ll get a better offer and less dilly dallying.

with ease and confidence. Multiple interviewers is usually a barometer on your ability to handle stress.

Show up and answer their questions. It is also a good time to ask questions about corporate structure and culture.

The same way you would perform with one member.

Of you know who will be interviewing you I highly recommend looking up each person and trying to better understand their job functions. Based on the position you are interviewing for you can have prepared questions for each person that are more targeted to what they actually do and how you would be working with them .

Take a breath and give yourself time to think about your answers before speaking. Make eye contact & show off your personality.