Pros
Only go if you have no other choice. You can learn something, but don't spend too much time here. People look down in your CV if you spend too much time here. Most people leave after some years. Those who do stay probably don't get jobs elsewhere, and this reflects in how the company is run.
Cons
Uncivilised behaviour from management. They treat you as their servants, not as consultants. Often very rude, no consideration for personal boundaries. No over time plus salary is very low. Most perks present in other safety consultancies doing similar work does not exist. Bell energy is basically a lala company whose main strength is providing low cost services.