I worked at GMMB full-time
Agency experience, great coworkers, big clients
Culture is nose-to-the-grindstone stifling, 60 hour work weeks
I applied online. I interviewed at GMMB (Washington, DC) in May 2017.
A recruiter reached out via LinkedIn to schedule an initial phone interview. The phone interview did not begin on time, though it was fairly standard with a discussion of work experience, skills, past client work, accomplishments, etc. I was invited to the DC office for three, 30-minute in-person interviews after the phone discussion. None of the three started on time. The recruiter could not locate these individuals (two of the three had just started a few months ago). Did ultimately meet with all three - one brought personal problems into a so-called professional interview, discussing flood damage to apartment. Said individual also did not have sent resume available and referred to cell phone during the interview, limiting eye contact. The other had to cut the interview, which began later than scheduled as is, 10 minutes short (lasted from 11:30am -11:50am as opposed to until noon as scheduled). As far as next steps were concerned, recruiter finished by saying contact will take place within a week or feedback would be given - nothing after six weeks.
As someone who has multiple years of experience working for highly recognized clients, I can safely say this was the worst interview experience I've had. Be very cautious when dealing with them - they are disorganized and unprofessional.