When I’ve recruited for niche roles, which these are a lot like, I would hyper target with good results. Meaning go after people on a particular team at a parti

When I’ve recruited for niche roles, which these are a lot like, I would hyper target with good results. Meaning go after people on a particular team at a particular company, or recruit from people who graduated from a specific program or lab in a school. If you can narrow your search criteria down to a specific set of names, you can often just reach out directly and do a better job at it than a recruiter. Conferences used to be good for this, too, and sometimes meetups.