Do you think I should email someone else?

I applied for a job at a research lab, and also reached out to a senior scientist on LinkedIn for it. I am very qualified for the position, btw. The guy on LinkedIn replied and said to email him. I emailed him on Friday, heard nothing back from him by Monday afternoon, and so sent a follow up message on LinkedIn to confirm that he got my email. He then replied to my email on Tuesday morning asking when I'd have time to talk. I replied to him 30 minutes later, giving him my availability, and since then I haven't heard anything at all from him. Should I be patient and wait for him or try reaching out to someone else?