Area code for all phone numbers is 615. Our mailing address is listed on the Contact Us page.
Program Management
Rhonda Foster
Assistant Director
Hospital/Clinic Safety,
Medical Center Safety Officer
phone: 322-1989 | fax 343-4951
rhonda.foster@vumc.org
Mark Bogard
Assistant Director
Chemical/Lab Safety
& Chemical Waste Program
phone: 936-8461 | fax: 343-0251
mark.j.bogard@vumc.org
Christopher Helstern
Assistant Director
Radiation Safety
Radiation Safety Officer
phone: 343-8502 | fax 343-4951
christopher.m.helstern@vumc.org
Alexandra Elliott
Assistant Director
Biological Safety
Biological Safety Officer
phone: 322-0927
alexandra.elliott@vumc.org
Administrative Staff
Biological Safety Program
Alexandra Elliott
Assistant Director,
Biological Safety Officer
phone: 322-0927
alexandra.elliott@vumc.org
Bettye Ridley
Senior Safety Officer
Biological Safety
phone: 322-0243 | fax: 343-4951
bettye.d.ridley@vumc.org
Richard DiTullio
Safety Officer
Biological Safety
phone: 322-1988 | fax: 343-4951
richard.ditullio@vumc.org
Chemical/Lab Safety & Chemical Waste Program
Mark Bogard
Assistant Director
Chemical/Lab Safety
& Chemical Waste Program
phone: 936-8461 | fax: 343-0251
mark.j.bogard@vumc.org
Chemical Waste Program
Laboratory Compliance Program
Cary Negus
Senior Safety Officer
Laboratory Compliance Program
phone: 343-2940 | fax: 343-0251
cary.t.negus@vumc.org
Mark Pavlack
Safety Officer
Laboratory Compliance Program
phone: 343-3528 | fax: 343-0251
mark.pavlack@vumc.org
Jennifer Harvey
Safety Officer
Laboratory Compliance Program
phone: 421-8531 | fax: 343-0251
jennifer.harvey@vumc.org
Samantha Bonczek
Safety Officer
Laboratory Compliance Program
phone: 322-2057 | fax: 343-0251
sam.thacker@vumc.org
Radiation Safety Program
Christopher Helstern
Assistant Director,
Radiation Safety Officer
Health Physicist
phone: 343-8502 | fax 343-4951
christopher.m.helstern@vumc.org
Juan "John" Sepulveda
Program Manager,
Assistant Radiation Safety Officer
Health Physicist
phone: 421-8758 | fax 343-4951
juan.sepulveda@vumc.org
Amber Vredenburgh
Safety Officer
Health Physicist
phone: 322-7037 | fax 343-4951
amber.vredenburgh@vumc.org
Katelyn Caldwell
Associate Safety Officer
Health Physicist
phone: 322-2057 | fax: 322-4737
katelyn.caldwell@vumc.org
Radioactive Waste Program
Hospital/Clinic Safety Program
Rhonda Foster
Assistant Director
Hospital/Clinic Safety
Medical Center Safety Officer
phone: 322-1989 | fax 343-4951
rhonda.foster@vumc.org
Respirator Fit-Test Program
Ashley Walker
Safety Officer
N-95 Respirator Fit-testing Program
phone: 343-1387 | fax 343-4951
ashley.strader@vumc.org
Monique Johansen
Associate Safety Officer
N-95 Respirator Fit-testing Program
phone: 343-1387 | fax 343-4951
monique.johansen@vumc.org