דרוש פרילנסר מומחה לproofread my writing

I'm a PHD student in psychology. I am writing my dissertation in English which is not my first language. I am looking for someone who can proofread my writing on a regular basis for the next 3 years. I need someone with high level of English proficiency (native speaker only) who charges reasonable prices that will enable long term work relationship. Please send me your offers