Willis

A Phoenix Foundation scientist whose work appears to deal mainly with environmental studies, although he did appear to be knowledgeable in electronic surveillance technology in the episode “The Wall”.

It is quite conceivable that Willis was employed by the Phoenix Foundation because of his broad range of scientific knowledge, with surveillance and environmental science being his specialties. It could also be that Willis was the head scientist or departmental head, which would explain why he was called upon by MacGyver and Pete whenever they needed scientific help.