How to list two different careers on a resume

Part 17 of 21 in the Series: Career Advice - Ask IT Career Coach
Resume Writing & Cover Letters Coaching
Resume Writing & Cover Letters Coaching

[Ask IT Career Coach] is a Career Advice Column for Information Technology (IT) professionals looking for answers to their most challenging career situations …

Submit questions about your career using the [Ask IT Career Coach] service and I will answer it for you just like I am answering this.

Here is a question submitted by Michael, an IT Project Manager

How can I incorporate my 14 years Supply Chain / Logistics background with my current IT Project Management experience, without aging myself or making myself unmarketable.