Pros
Zocalo offers a chance to work on top-tier clients in a fast-paced but friendly office culture where you can still get to know everyone. Leadership is extremely responsive to feedback from all levels, and is continuously fine-tuning policies due to feedback. There's a sense that Zocalo is "our company," and an entrepreneurial spirit is embraced. Employees at all levels are expected to bring creative ideas and new ways of doing things to the table. Unlike at some large agencies, there's also a lot of flexibility in terms of professional growth. In addition to lots of training, leadership allows people to move around to different functions -- i.e. from account management to research or digital -- and takes people's passions and interests into account when making staffing plans. The company also puts a lot of focus on culture, so expect a work-hard, play-hard attitude with perks like short Fridays in the summer and plenty of staff parties.
Cons
It seems normal for the industry (and a growing company), but the staffing process is always a work in progress; work levels can go from slow to crazy-busy, and it can seem like some people are underworked while others are burning the midnight oil. And a couple of things that could be pros or cons depending on your work style: It's a very collaborative environment and an e-mail heavy environment, so expect to spend a lot of time in meetings and answering emails!