I am responsible for a department wide function and am supported by one colleague to deliver this.
This colleague is great and very competent. Approximately 85% of their time is spent supporting my work. However, I do not line manage this individual and am now struggling with their line manager indirectly interfering in my work. Their line manager and me are the same level and report to the same director.
An example is that I had asked my colleague to complete a piece of work within a set period of time - we discussed the objectives, parameters etc. I was away for the week and it was agreed it would be completed whilst I was away (I fully trusted them to complete it as discussed).
This piece of work solely related to my area and I am responsible for it.
During a catch up with their line manager they discussed it and he wanted it done differently. As a result the piece of work has not happened in agreed timeline. Additionally, the piece of work is completely outside of his remit - so the only reason he had the opportunity to influence / direct it is because he line manages the individual who I rely on to support my work.
I am worried that lines of responsibility are being blurred and additionally I don't want my colleague caught between two conflicting directions. I have a meeting with our director today who line manages me and my colleagues line manager - do you have any tips about how I should approach this?
I just want to be able to direct my work without there being undue influence because of my colleagues line manager!