UX design and enterprise program management [closed]

Working as UX designer in medium sized company (~700 persons), I find it non-trivial to fit the UX design work into enterprise program management process. That process means defining new products with customer, and establishing, monitoring and overseeing respective dev projects. The process is driven by sales, product and program management.

How to mix these two together? Which UX activities should happen on that level? How to work with offices like requirement management and architecture?

Do you happen to know any articles, video presentations or similar on the topic?