Sounds exactly the same as my position (Score 2)

I work for a similar sized company, and our architecture team was built taking senior people from several different admin groups. Separation of duties, especially when you are covered by PCI, Sox, etc, is the norm.

As long as you have access to complete information as to the design, implementation, and how systems are running and working, you probably would not have unfettered access. It should not prevent you from doing your job. But you absolutely have to have a good working relationship with the people who do have that access.