I'm new, been in my job a few months. He has been here over 10 years so I understand he has experience etc. He has moved into a higher role than he was before and this is his first time doing this role. Within my role I have to task colleagues to do things and I also have to make sure it's well documented. If I don't do this it could have extremely bad consequences on others safety. WE are in different departments but have to work together. Last week I had push back from this colleague when I asked if he could call someone . He sent me an email telling me he didn't think this was the right course of action with others copied in. My line manager backed me and told him he needs to do it and explained we need to follow the procedures we have in place to keep others safe. He said he had called the appropriate people but he didn't record this down and I don't believe he actually did it.
Today I've tasked him with something else. Instead of replying to me, he went to a colleaugue who is in my department and said something like he has been doing what I asked. This colleague asked if he had recorded it though, he said no he had not. He's now updated the system but again has ignored what I've asked and is not following what we need to do to keep others safe. It seems he thinks that he thinks what he does in his department is just his decisions and what our department asks (or just me) he will not do. My department has say over every department because we ultimately keep others safe.
Another colleague in my department tasked him to get one of our customers a referral, he has come back and basically our customer has improved and he doesnt think any further action is needed. It's not his call to make, he is not trained to make this call.
How can I deal with this kind of colleague? I'm starting to feel anxious when I email him now because I think what is he going to throw back now.