Summer Intern applicants have rated the interview process at ICF with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 69.1% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Interviewers were very nice! It was not a case-based interview - all behavioral questions about my past experience, interest in the job, etc. I went through several rounds of interviews and didn't end up getting an offer.