Pros
Highly motivated, intelligent and collaborative colleagues. From my past experience, most trading and development environments are stocked with smart folks that have giant egos but somehow Group One managed to avoid employing this type of employee. Developers and traders are all very high achievers, many are been with the firm for more than 5-10 years and a handful of the 2-5 year traders are very successful. The dress code is quite casual, there are regular poker games and ping pong games after the market closes. Most employees have been with the Group One for many years, so the environment is fairly stable.
Cons
There were some lean times a few years back but things have seemed to stabilize and quite a few new employees have been hired and some former employees have rejoined the firm. The firms results are volatile but I suspect that is largely due to macroeconomic and industry trends. Our office is a bit of a dump and could use a little renovation, but the location is great.