# Personnel
**Source**: https://bvt.cs.tum.de/en/team/personnel
**Parent**: https://bvt.cs.tum.de/en/
## Head
### [Prof. Dr-Ing. Michael Zavrel](/en/team/michael-zavrel)
[Professorship Bioprocess Engineering](/en/)
- Head of Professorship
Phone:
: [+49 9421 187-440](tel:+499421187440)
Email:
: [michael.zavrel@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.115](https://nav.tum.de/room/3505.02.115)
## Office
### Nadine Piendl
[Professorship Bioprocess Engineering](/en/)
- Team assistant
Phone:
: [+49 9421 187-441](tel:+499421187441)
Email:
: [nadine.piendl@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.114](https://nav.tum.de/room/3505.02.114)
## Research Associates and Doctoral Candidates
### Dennis Beerhalter, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-436](tel:+499421187436)
Email:
: [dennis.beerhalter@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.110](https://nav.tum.de/room/3505.02.110)
### Gelda Bogran, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-476](tel:+499421187476)
Email:
: [gelda.bogran@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.113](https://nav.tum.de/room/3505.02.113)
### Gelda Bogran, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
Phone:
: [+49 9421 187-476](tel:+499421187476)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.3505.113](https://nav.tum.de/room/3505.02.3505.113)
### Jennifer Borger, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-437](tel:+499421187437)
Email:
: [jennifer.borger@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.113](https://nav.tum.de/room/3505.02.113)
### Venessa Dsouza, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-469](tel:+499421187469)
Email:
: [venessa.dsouza@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.113](https://nav.tum.de/room/3505.02.113)
### Nico Geisler, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-439](tel:+499421187439)
Email:
: [nico.geisler@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.110](https://nav.tum.de/room/3505.02.110)
### Melissa Grundwürmer, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-509](tel:+499421187509)
Email:
: [melissa.grundwuermer@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.3505.111](https://nav.tum.de/room/3505.02.3505.111)
### Eric Gathirwa Kariuki, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-507](tel:+499421187507)
Email:
: [gathirwa.kariuki@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.111](https://nav.tum.de/room/3505.02.111)
### Juan Mariño, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-448](tel:+499421187448)
Email:
: [juan.marino@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.112](https://nav.tum.de/room/3505.02.112)
### Dr. Tim Sieker
[Professorship Bioprocess Engineering](/en/)
- Postdoctoral Researcher
Phone:
: [+49 9421 187-446](tel:+499421187446)
Email:
: [tim.sieker@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.110](https://nav.tum.de/room/3505.02.110)
### Ulf Stegemeyer, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-449](tel:+499421187449)
Email:
: [ulf.stegemeyer@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.112](https://nav.tum.de/room/3505.02.112)
### Estelle van der Walt, M.Sc.
[Professorship Bioprocess Engineering](/en/)
- Doctoral Candidate
- Research Associate
Phone:
: [+49 9421 187-447](tel:+499421187447)
Email:
: [estelle.van-der-walt@tum.de](#)
TUM Campus Straubing
Uferstraße 53\
94315 Straubing
Room: [3505.02.111](https://nav.tum.de/room/3505.02.111)