### current position

- professor & associate chair of mathematics, san francisco state university

### education & previous positions

- staatsexamen mathematics and physics (secondary education), universität würzburg, 1997
- diplom mathematics, universität würzburg, 1997
- ph.d. mathematics, temple university, 2000
- robert riley assistant professor, binghamton university (suny), fall 2000 - spring 2003
- member, mathematical sciences research institute, berkeley, fall 2003 & spring 2008
- member, max-planck-institut für mathematik, bonn, spring - summer 2004
- assistant professor, san francisco state university, fall 2004 - spring 2009
- associate professor, san francisco state university, fall 2009 - spring 2013
- professeur invitÃ©, universitÃ© d'evry val d'essonne, may 2012
- visiting scholar, cornell university, august - september 2014
- gastprofessor, technische & freie universität berlin, october - december 2014
- visiting professor, vassar college, spring 2015

### research & writing

### teaching & mentoring

- undergraduate and graduate courses at binghamton and sf state, including number system, proofs & exploration, number theory, complex analysis, algebra, combinatorics, linear algebra, computational geometry, communicating mathematics
- adviser to numerous research students and postdocs at sf state, uc berkeley, and msri
- mentor for the national alliance for doctoral studies in the mathematical sciences (since 2009)
- research director for msri-up 2012
- research leader for reuf 2014
- codirector of the san francisco math circle (2005-1014)
- director of the (cm)² program at sf state (2009-2014)
- consultant for project next (2009/10, 2014-16)
- 2012 award for distinguished college or university teaching of mathematics, northern california, nevada & hawaii section of the mathematical association of america
- 2013 deborah and franklin tepper haimo award for distinguished college or university teaching of mathematics

### grants

- national science foundation research grant dms-1162638 ($143,904)
- national science foundation gk-12 grant dge-0841164 ($2,960,937)
- national science foundation research grant dms-0810105 ($140,414)
- national science foundation conference grant dms-0963923 ($49,430)
- sf state presidential award for professional development, spring 2008
- sf state summer research grants, 2005 & 2006

### editorial boards

- electronic journal of combinatorics (since 2013)
- online journal of analytic combinatorics (since 2013)
- maa textbooks (since 2014)
- expositiones mathematicae (2011-2012)
- journal of number theory (2004-2012)

### conference organization

- formal power series & algebraic combinatorics 2009-2011 & 2015
- banff workshop dedekind sums in geometry, topology, and arithmetic 2009
- ams sessions in san francisco (2006, 2009 & 2014), san diego (2008), and claremont (2008)
- msri workshop great circles 2009
- ams-ims-siam summer research conferences 2003 & 2006
- msri/pims/banff summer school 2005
- bay area discrete math days 2004-2006