bᵻfˌoːɹ tˈeɪkɪŋ ˌʌp ðə pəzˈɪʃən æt ðə jˌuːnɪvˈɜːsᵻɾi ʌv ˌæɹɪzˈoʊnətˈʌksən, hiː hˈɛld ɐ nˈʌmbɚɹ ʌv ˈʌðɚɹ ˌækədˈɛmɪk pəzˈɪʃənz.
Before taking up the position at the University of Arizona-Tucson, he held a number of other academic positions.