1.You will have the chance for great exposure to a multi-network & mutli-vendor environment not provided in most Telecom places (except groups).
2. Learn more about about how business is run (business plans, budgets, due diligence)
Cons
1. Limited career growth outside the organization
2. instability as you are under a merge/acquisition deal at any time
3. Not a very heatlh environment (senior management imposes such environment...however the chairman and CEO are trying to improve/eliminate such deficiences)