Dual degree: M.S. Mechanical Engineering/ M.S. Engineering Management

Currently our son has been working in one of those govt contract companies, dealing with planes, etc He is still new with close to two years experience in his belt. The company is sending him to further his education by doing dual degree: MS Mech Eng and MS Engineering Management (Viterbi-USC).

I am just curious if this so called dual degree will improve or take his career to another level and in the long run hopefully will benefit him at all? he is only 19 and he will start fall 2017 by doing PT basis, perhaps will take him about 3 or 4 yrs of education.

In addition, I am wondering if this dual degree is doable and will be tough on him while he is working FT?