Help with Join+Collect Formula

rc_vms

I need to reference another sheet to join and collect the skills of employees. The yellow is my desired outcome, and I'm using the following formula.

Formula: =JOIN(COLLECT({Detailed Resource Data Master Range Skills}, {Detailed Resource Data Master Range Emp ID}, [Employee ID@row), ",")

I'm not getting any errors, the value just shows up blank.

Your guidance is appreciated!

Desired Outcome:

Current Outcome:

Darren Mullen

@rc_vms can't tell since you don't have the employee id in the screen shot but it's possible it may be text in one sheet and a number in the other.