I have been working at Omnicom full-time (More than 3 years)
great variety of the best branding and ad agencies
Not all of the Omnicom companies work well with other affiliate Omnicom companies.
Advice to Management
Better communication down to the Sales level on shared accounts..
I applied online. The process took 2 days. I interviewed at Omnicom (New York, NY) in November 2017.
Recruiter was unprofessional, she sent me and email 5 minutes before asking something random about my resume and then called me 20 minutes after our schedule time. It was really weird.