Quick to hire and fire; as a project based company, when a project is over, don't expect to be held on to unless the next job is in the wings. Nothing really different to other consulting firms.
Since the departure of John Grill theyhave been through several restructurings, and after trying themselves in other engineering areas, the company has regressed back to a hydrocarbons / large processing industry firm. So if you are interested in smaller jobs where you are not just a cog, suggest you look elsewhere. In particular Power and Infrastructure focus has totally gone.
As with any large listed company the internal procedures have slowly grown into something that tends to take the initiative away from individuals. Not a bad thing, but you need to expect everything will take a bit longer than you would expect.