There were 3 rounds of interviews. I went to a couple of career panels beforehand, had a mutual connection working in Chemonics who I referenced in my cover letter and I applied twice (but never got a response) to the part-time archivist position while I was in college.
Right out of college, I applied again for a full-time archivist position in a regional business unit. After about a month I received an email back stating that I was chosen for a phone interview (shocking because most people I know who have applied never got any response back). The person who was doing the phone interview with me was someone from my college lectures, so I brought that up (somewhat creepily) at the end of the phone interview. The phone interview were the usual questions of why chemonics, what is your working style, 3 adjectives that describe you (questions you can find on google easily). Prep these in advance, have notes in front of you, and just be super friendly and kind on the phone. As soon as you're done the interview, email the interviewer back about how great it was speaking to them, etc.
I got a second interview callback (which is the main one you need to pass to get the job). They send you an email with three employees names in your department who will interview you in a panel format.
I can speak to this part both as an interviewee and interviewer (I got the job and interviewed others for the same position). You walk in on time, well dressed, very friendly. Wait for everyone to arrive on time. During this time, mention/ask questions about each employee (not their job position - that'll be discussed later anyways. Show that you stalked them on Linkedin - make it public that you stalked them, no incognito browsing, and talk about anything interesting on their profile (by the way I read that you did peace corps in mongolia? I was interested in mongolia too - make it up)
Questions start with them telling you about Chemonics history, values and then the archivist position details.
The most important things for you to know for the archivist/RBU assistant position is this:
read your job description and have clear examples showing that you can handle the functions of that position -- organization, problem solving, data management, detail-orientation
hard skills (google docs, excel, microsoft word, languages, organization, time management, communication, database handling)
have examples of when things didn't go to plan/challenges came up (don't bad mouth anyone/name drop/speak ill of your past boss), but have solid examples of how you overcame challenges
Show that you're an independent problem solver (google is key, look at resources available to you)
Sensitive/flexible to others' work styles (ppl can be totally hands off and leave you alone for months and some ppl will be at your desk or email you 15x a day)
After interviewing over 9 people, the person who got the job at the end who only had work experience being a grocery store shelver... it's not about what job you had, but how well do you communicate/analyze your experiences/know yourself
The last part is meeting with the senior VP of the department, which is a pretty friendly conversation about your interest in development/where you want to go from here