Does your son have the educational requirements to qualify to sit for the USPTO patent agent’s exam to become a Patent Agent ? (physics, biology,chemistry, hard sciences).
Becoming a patent practitioner|USPTO General requirements bulletin July, 2021 (43 page pdf)
https://www.uspto.gov>documents>OED-GRB.pdf
Consider investigating / researching one year specialty masters degrees in business. Data analytics is an example of an in high demand specialty by consulting firms. Most do not require any accounting course background. Many programs have direct pipelines to major employers.
P.S. Although not recommended, your son could probably sit for the GRE without any or very minimal preparation & score high enough for admission to elite masters & MBA programs with scholarship money since he is a math major with strong English/reading/comprehension skills.