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
![Chris Helstern Chris Helstern](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Chris-Helstern.jpg)
Christopher Helstern
Assistant Director
Radiation Safety
Radiation Safety Officer
phone: 343-8502 | fax 343-4951
christopher.m.helstern@vumc.org
![Alexandra Elliott Alexandra Elliott](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Alexandra-Elliott.jpg)
Alexandra Elliott
Assistant Director
Biological Safety
Biological Safety Officer
phone: 322-0927
alexandra.elliott@vumc.org
Administrative Staff
Biological Safety Program
![Alexandra Elliott Alexandra Elliott](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Alexandra-Elliott.jpg)
Alexandra Elliott
Assistant Director,
Biological Safety Officer
phone: 322-0927
alexandra.elliott@vumc.org
![Bettye Ridley Bettye Ridley](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Bettye-Ridley.jpg)
Bettye Ridley
Senior Safety Officer
Biological Safety
phone: 322-0243 | fax: 343-4951
bettye.d.ridley@vumc.org
![Rich DiTullio Rich DiTullio](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Rich-Ditullio.jpg)
Richard DiTullio
Safety Officer
Biological Safety
phone: 322-1988 | fax: 343-4951
richard.ditullio@vumc.org
Chemical/Lab Safety & Chemical Waste Program
![Mark Bogard Mark Bogard](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Mark-Bogard.jpg)
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 Cary Negus](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Cary-Negus.jpg)
Cary Negus
Senior Safety Officer
Laboratory Compliance Program
phone: 343-2940 | fax: 343-0251
cary.t.negus@vumc.org
![Mark Pavlack Mark Pavlack](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Mark-Pavlack.jpg)
Mark Pavlack
Safety Officer
Laboratory Compliance Program
phone: 343-3528 | fax: 343-0251
mark.pavlack@vumc.org
![Jennifer Harvey Jennifer Harvey](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Jennifer-Harvey.jpg)
Jennifer Harvey
Safety Officer
Laboratory Compliance Program
phone: 421-8531 | fax: 343-0251
jennifer.harvey@vumc.org
![Samantha Thacker Samantha Thacker](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Samantha-Thacker.jpg)
Samantha Bonczek
Safety Officer
Laboratory Compliance Program
phone: 322-2057 | fax: 343-0251
sam.thacker@vumc.org
Radiation Safety Program
![Chris Helstern Chris Helstern](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Chris-Helstern.jpg)
Christopher Helstern
Assistant Director,
Radiation Safety Officer
Health Physicist
phone: 343-8502 | fax 343-4951
christopher.m.helstern@vumc.org
![Juan Sepulveda Juan Sepulveda](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/John-Sepulveda.jpg)
Juan "John" Sepulveda
Program Manager,
Assistant Radiation Safety Officer
Health Physicist
phone: 421-8758 | fax 343-4951
juan.sepulveda@vumc.org
![Amber Vredenburgh Amber Vredenburgh](https://www.vumc.org/safety/sites/vumc.org.safety/files/public_files/images/staff/Amber-Vredenburgh.jpg)
Amber Vredenburgh
Safety Officer
Health Physicist
phone: 322-7037 | fax 343-4951
amber.vredenburgh@vumc.org
![Katelyn Darbonne Katelyn Darbonne](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Katelyn-Darbonne.jpg)
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
![Ashley Walker Ashley Strader](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Ashley-Walker.jpg)
Ashley Walker
Associate Safety Officer
N-95 Respirator Fit-testing Program
phone: 343-1387 | fax 343-4951
ashley.strader@vumc.org
![Monique Johansen Monique Johansen](https://www.vumc.org/safety/sites/default/files/public_files/images/staff/Monique-Johansen.jpg)
Monique Johansen
Safety Tech
N-95 Respirator Fit-testing Program
phone: 343-1387 | fax 343-4951
monique.johansen@vumc.org