Just to make sure we are all on the same page:
That MSC does not utilize a job board. They only assign "checks" over email. To apply, you have to email the scheduler directly. If you have done so and still see the scheduler send out emails advertising the same job, ask again. Of course, if they still ignore you, you can send an inquiry as to what you would need to do in order to make yourself a viable candidate for their work.
Hard work builds character and homework is good for your soul.