I have worked with Jason during my last job search. Jason is an amazing recruiter. He is extremely prompt, he immediately matched my skill sets with potential employers he was aware of and put me in touch with them within a couple of days. He also helped me polish my resume and provided key information and guidance about the companies/groups I was interviewing with.
He is one of the best recruiters I have worked with.
All in all I would highly recommend Jason as a recruiter for the Quant, Analytics and Big Data space.