Filtering a table based on different columns

Hello! I'm trying to make a report/visual aid to assist in personnel training. They have been tracking everything in excel, and want a better way to show bosses how good or bad we are doing in complying. 

Here is what my data looks like:

The table went wonky, i can rewrite if it doesnt make sense

(For simplicity of example: assume training is annual, so John would be overdue for Training 2&3)

So far I already have calculation columns and measures to help me with some donut graphs (x% g2g, y% overdue, that kind of thing.)

# Column
IsTraining1Current = IF('dataset'[Training 1] >= TODAY() - 365, 1, 0)

# Measure
Remainder Training 1 = COUNT('dataset'[Personnel ]) - SUM('dataset'[IsTraining1Current])

What I would love to do is be able to select each training in a slicer, and then have a single column of personnel who still need to get their training done. 

So for example if I select "Training 3" in a slicer, it would filter the above table and only display "John Doe", since his training is over a year old. 

If anyone could at least point me in the right direction, that would be wonderful.