I have a PhD degree in computational physics and extensive knowledge and experience in math, mathematical modelling, probability, Markov chains, stochastic processes, and so on. I'm the author of publications that studied stochastic behavior, including a paper in the journal called 'Chaos'. Please see reviews on my profile. It would be my pleasure to help.
Just FYI, I own a small engineering consulting business registered in the state of Illinois. You could pay me as an individual freelancer or as a business, whichever suits you better.