HiMark will help you find your co-op placement on the first week of class. The position is unpaid as it more for the opportunity to connect with a local contractor, see how the work is done and a chance to show them how well you work.
HiMark does not restrict students to who they choose to do their co-op with. If you find an employer that has a licensed G2 or G1 onsite to supervise you, you can work with them, too!