VBA Check Box to return crew members name instead of true or false.

So I am once again out of my league. I've been googling and searching on here for hours trying to figure out how I can take a UserForm and return a group of names based of the users selection. At the moment my code is set up to have the user select a service from a drop down menu, which is then posted to a cell and any combination of three check boxes. I haven't been able to think of a way to get the check boxes to function though.

The checkboxes are there so I can see which employees were on a job site. I want to be able to search the info later to compare which teams of guys work best together. In addition the employees are only paid for time on the job site. When they use the userform it auto calculates the amount of time they spent on the job. Ideally I would be able to determine payroll based off the same info, If and only If I can get the crew names to print on the sheet in a searchable manner.

Idk what to do folks. any ideas would be appreciated.

Sorry Xladept, I was working on loading this in when I got distracted with a possible resolution.

The image below is the only thing my crews will see until they press one button or the other.
Crew View.PNG

When they press "Ignition Off" the Userform "frmOff" will run. This is what it looks like.
IgnitionOff.PNG

After they fill the form out the info is printed in a hidden sheet. Which looks like this.
Results of Off.PNG

When the crew finishes working they will click "Ignition On" the UserForm "frmOn" will run. This is what it looks like.
IgnitionOn.PNG

After they finish the results now look like this. (I should mention the Date and Time In are autopopulated as well as the time out. I'm a little scatterbrained and some titles still need changed around. sorry
Results of On.PNG


I currently have no code in for the checkboxes at all. I was preparing to write an If statement that set up a macro to run if the box is clicked as true. The Macro would paste the persons name in the cell. Still not sure how I could get multiple names pressed.