What he had just looked like boiler plate to me lifted from anywhere. My friend that recommended him signed the same contract himself and he is a lawyer.
Everything can be fine as long as you do not have a problem.
My one son is a lawyer for an insurance company and is an expert on worker's comp. He gave us some good advice and told us to make sure we have a worker's comp rider on our home owners insurance. While we have high liability insurance it may not cover workmen and if contractor says he has it and does not we could be liable. Son said he is working on 5 cases right now with this issue.
A problem here in DE, is that being a small state we have contractors coming in from nearby PA, NJ and MD. While these out of state contractors need license and insurance to work in DE and bought it in their state it may only cover their state. Most clerks do not know this and may issue a license to an out of state contractor who showed him a policy that he was insured. Even a lot of the out of state contractors do not know that their insurance only covers the state of issue.
This is the stuff that my son contends with all the time.