You don't really say how long you've worked with these folks so I'm guessing here, but in my experience you have to build credibility and trust first. Focus on

You don't really say how long you've worked with these folks so I'm guessing here, but in my experience you have to build credibility and trust first. Focus on the opportunities rather than the problems, connect people doing similar things in different areas and jump in when they are solving problems after the fact. The last part, for me, has been key to building it in my career (30 years in infra/tech/security).