 We have developed a novel approach for implementing programmable unitary operations in the orbital angular momentum, OAM, domain. Our approach involves decomposing any desired matrix operator into diagonal and Fourier factors, which are then applied to the OAM and azimuthal angle domains respectively. This allows us to implement arbitrary matrix operators without requiring any additional hardware components. Numerical simulations demonstrate the feasibility of this approach, while proof of principal experiments on the path domain confirm its accuracy. This article was authored by Lichir Khan, Fongshua, Chwekayu, and others.