Lucius Munatius Felix was a Roman eques who held a number of appointments during the reign of the Emperor Antoninus Pius, most notably praefectus or governor of Roman Egypt (149-154).
About his career, although it can be assumed Felix passed through the tres militiae, the only office attested for him is his tenure as governor of Egypt, an important post because Egypt provided a large share of the grain needed to feed Rome.
The duties of the praefectus extended beyond ensuring that this was furnished so the inhabitants of the city were fed.
He commanded the troops stationed there: during years Felix was responsible for the province, two legions were based there, Legio III Cyrenaica and Legio XXII Deiotariana.
Justin explains that the Christian desired this in order to avoid all sexual promiscuity.