Pros
ERM offers great opportunities for growth. Because you are working as a consultant, you not only focus on your area of expertise, but also learn how that connects with other areas of business. ERM is very customer-centric, but they are also very much about their people. The people are about as great as it gets when you're working with a bunch of engineers and scientists. People generally try to keep negativity out of the office and are very much about solving problems in a constructive way. There are open conversations with management about ways to improve offerings to clients, and you are given the authority to "Stop Work" on unsafe work sites. Depending on your supervisor, the office you work from, and your level of responsibility, you may be afforded a more flexible working schedule (hours, when you have to be in the office/when you can work from home).
Cons
ERM offers a great work environment where a personality fit is a must. If you do not fit in with the ownership mindset, you won't last long. Also, you have to remember that this work is customer-driven. If you are not able to connect with customers and bring in work, you won't have much of a future here. At times, you will have to work long hours to meet client needs or deadlines. However, the workload is volatile. There will be times when you are so bored you want to poke your eyes out. Load-leveling can be a bit of an issue, but really, the people that you work with more than make up for this.