It seems to be very difficult to find information about Dr. Sifuni Mchome. I did find a short bio at the site below:

Source

He is clearly a very intelligent and well respected man. I haven't connected the dots yet as to why this is an important visit for Bill. Meeting the Secretary of the Ministry of Education and Vocational Training doesn't seem like a value added trip on the surface, but I'm sure there is more going on behind the scenes than one picture (i.e. who are the others in the pictures and who else is he meeting while in Tanzania?)

GLTA