My tip is to be as practical as possible:
People need to be kind of impressed to change their behaviour. So any opportunity to include users … grab it … record it … make it tangible and visible (Live Sessions/highlight videos)
Afterwards spread the information, present it and try to discuss with all other project stakeholder. Try to communicate to be a problem solver.
One thing you should always have in mind: Don´t think just in UX Expert terms, try what you practice you empathy skills with all project stakeholder. Concentrate on deciders which can provide you project ressources but also promote in the project in general. Concentrate on ressource and money savings beside positive consequences for yousers on caused by applying your methods.
Listen ,analyze and proactively promote lean ux methods before thinking in bigger projects. If you get a chance to grab a bigger project opportunity … don´t think … do it.
Another really important issue: Keep control of your UX project, don´t let a head overrule everything but try to include his concens in your own way … You´re the UX expert