Pros: Tolerable compensation, chance to enter a new industry, opportunities for the bilingual
Cons: Working conditions, job insecurity, lack of training, lack of reasonable support throughout the organization
The last thing you would want to do is take anything that happens to you as a manager with SBM personally. It is like riding 2 horses, pulling in opposite directions, at the same time.
The projects are under-bid, meaning you can easily become a scapegoat for either the client or SBM (most likely both). You will not have the resources to get the job done, and your time will not be respected. Long days are a fact of life for managers in 2015, but why does this mean a late night can't be started by a later start the next day? Why can't you know in advance when it's not an emergency?
Ok, I guess it's a start in facility management for those who are really interested. There are also large, prestigious accounts, but taking this job in an effort to eventually work for the client will result in disappointment, once the client understands how SBM operates.
Training is sorely lacking. You have 1 shot to learn everything, and you probably will not realize it at the time. HR support is not much better for any situation you might encounter in service industry management. There are a few isolated nice people at corporate, and it really catches you off guard when you encounter one of them.
Expect 1980's style screaming and yelling from regional management and above, without anything constructive to help you solve issues. Managing 25 people is like managing 125, trying to give custodians 5 different routes per week, to compensate for understaffing.
Especially watch out if you are not bilingual. You may be hired to produce the fairly sophisticated reports and for client relations, but directing those who don't speak English is VERY hard for most people. Yes, a few have succeeded, but the odds are highly unfavorable, especially if you are in a union environment.
Only other thing I'd add is that this is evidently a really difficult industry. I checked a few competitors, and found plenty of similar miserable experiences at all levels.