I worked at Sims Group full-time (More than 5 years)
Caring people, dedicated and great knowledge base. Pay was good, long hours but the day flew by working here.
No real cons. You are told to expect a large workload and they did not lie about that.
I applied through a staffing agency. The process took 5+ months. I interviewed at Sims Group (Chicago, IL) in May 2014.
Very formal, but the hiring manager was not planning on staying with the company. They were negative about the company. I felt that they were unsure about their future and found it difficult to have me come in as a new temporary with an optimistic approach. I was extended an offer that day, but it took almost 6 months to be hired into the company because there were a lot of excuses to delay it longer.