I think that she hasn't even graduated from U. of Michigan in Ann Arbor yet!
By the way, her top tuba is a Perantucci PT-6 five valve CC tuba, while the lower one is a Yamaha 822 five valve F tuba. You'll hear a PT-6 on the MTT/SFSO Mahler recordings. The Yamaha 822 is a very large bore F tuba that sounds more like a CC tuba. They're very popular for studio and jazz work in the L.A. area. Most symphony tuba players prefer something smaller with a "sweeter", more singing tone quality - sacrificing a bit in low end power. Alan Baer in N.Y., for example, uses a larger CC tuba (often times), but has a smaller F tuba. The PT-6 and 822 are more evenly matched.