Office
![Natascha Krienen](/typo3temp/assets/_processed_/d/9/csm_825e7fcdabe62f9b469bd8f4124808423e3a8952-fp-3-2-12-25_cac1cdf4c4.jpg)
![Natascha Krienen](/typo3temp/focuscrop/825e7fcdabe62f9b469bd8f4124808423e3a8952-fp-3-2-12-25.jpg)
Coordinator
![Michael J. Gruber](/typo3temp/assets/_processed_/d/e/csm_31ff02a2ee4a0ffb1d31dbbc33155cdfe76e995a-fp-3-2-28-18_cbe6253332.jpg)
![Michael J. Gruber](/typo3temp/assets/_processed_/d/e/csm_31ff02a2ee4a0ffb1d31dbbc33155cdfe76e995a-fp-3-2-28-18_c80a3be837.jpg)
Former Staff at the Riemann Center
Dr. Yuguang Zhang
Riemann Instructor 2020-2023
![](https://www.rc.uni-hannover.de/fileadmin/_processed_/5/0/csm_Portrait_Zhang_blau_36480685ed.jpg)
![](https://www.rc.uni-hannover.de/fileadmin/_processed_/5/0/csm_Portrait_Zhang_blau_95188e5767.jpg)
![](https://www.rc.uni-hannover.de/fileadmin/rc/members/Portrait_Zhang_blau.jpg)
Dr. Giuliano Gagliardi
Riemann Instructor 2019-2023 (left for Tel Aviv University)
![](https://www.rc.uni-hannover.de/fileadmin/_processed_/e/2/csm_Portrait_Gagliardi_2_382acd1dca.jpg)
![](https://www.rc.uni-hannover.de/fileadmin/_processed_/e/2/csm_Portrait_Gagliardi_2_a674ad4fb2.jpg)
![](https://www.rc.uni-hannover.de/fileadmin/rc/members/Portrait_Gagliardi_2.jpg)
Dr. Víctor González Alonso
Riemann Junior Research Group leader 2016-2020 (left for Humboldt University)
![](https://www.rc.uni-hannover.de/fileadmin/rc/members/Portrait_Gonzalez_blau.jpg)
![](https://www.rc.uni-hannover.de/fileadmin/rc/members/Portrait_Gonzalez_blau.jpg)
![](https://www.rc.uni-hannover.de/fileadmin/rc/members/Portrait_Gonzalez_blau.jpg)
Dr. Ulrich Theis
Scientific Coordinator 2012-2015 (left for Niedersächsisches Studienkolleg)