UX Architecture leverage over development process

How can a new UX Architect (newly created position) apply the best leverage to improve new and existing products across a medium-large organization?

This position is in a corporate IT department where UX practice is brand new, within a larger organization that is also very immature in it's UX approach.

As a UX Architect I would expect to be able to guide, and sometimes enforce good UX design decisions throughout the development process. Is this something that you have experienced in your organization?

How can a person with an architect-level role effectively guide, direct, educate and enforce UX standards across multiple development groups? What authorities are required, and what tools are available?

I'm currently thinking about integrated style-guides and pattern libraries to start with, along with best practice education sessions and offering design review and product usability testing services at the start of new cycles.