I fully agree with you here, I work in your field currently and noticed the wide range of skills that are employed. For example my lab director is a Physicist working in brain imaging research.

All the math I learned in school (I have a BS in math) seemed so small compared to the stuff I see used in the research the folks in my lab are doing. There is a great need of skilled mathematicians and comp sci folks in these bio based fields, as you pointed out. Biologist are smart people but when it comes to comp sci their cs skill sets are not always large enough for their need. That's where p eople like us fill in the blanks.