Interstate parole transfers are handled through the Interstate Compact for Adult Offender Supervision, which is the formal agreement between states that governs exactly this kind of situation. Every state participates in the compact, which means West Virginia and Florida both have an established process for handling transfer requests.
The process starts on the inside. Your person needs to formally request an interstate transfer through their West Virginia parole officer. That request gets submitted through the compact process and Florida's supervision authority reviews it to determine whether they will accept supervision responsibility. West Virginia retains ultimate authority over whether to approve the transfer while your person is still within their supervision period.
What makes a transfer request successful is demonstrating stability and a reduced risk of reoffending in the receiving state. The factors that carry the most weight are verified employment or a concrete employment prospect in Florida, a stable and documented living situation, and a strong support network of family or community connections. The argument you are making to West Virginia is essentially that his odds of successful completion of supervision are higher in Florida than they would be returning to West Virginia.
An affidavit from you or other Florida-based supporters documenting the home environment, the support available, and the stability of the situation can strengthen the request. Employment verification letters and any documentation of community ties help as well.
The fact that he is doing well with no problems is the strongest argument of all. A clean supervision record demonstrates exactly the kind of low-risk profile that makes states willing to approve transfers. Have his parole officer document that record clearly as part of the transfer request package.