"As a director of operations, you will be responsible for overseeing the day-to-day operations of a company. Your responsibilities as an operations director will vary by company as will the interview questions you are asked. Prepare to answer multiple questions regarding your communication skills and ability to delegate tasks as well as technical questions regarding your technical understanding of the operations of purchasing, sales, and manufacturing departments. A typical director of operations will possess a master's degree in business administration."
Have you handled major systems replacements and worked to manage several other projects at the same time to ensure interoperability.
I have experience in this area so I answered with examples. You will need to have experience PMing multiple medium/large projects simultaneously for this kind of role here.