Nikhef has an opening for a postdoctoral researcher in gravitational wave theory.

The "Computational Relativistic Astrophysics" division at the Max Planck Institute for Gravitational Physics (the Albert Einstein Institute) at Potsdam led by Masaru Shibata (director) announces the opening of several postdoc appointments. The postdoctoral position will be available at different levels, depending on experience and seniority, and can last for different number of years. 

The "Computational Relativistic Astrophysics" division is currently 
composed of one group leader (Dr Kenta Kiuchi), one senior scientist 
(Shinya Wanajo), and 8 junior researchers, and focuses on several research topics in theoretical astrophysics, 
computational astrophysics, and general relativity. 
The members in this division are working in the following topics: 
(i) numerical relativity with matter fields for a variety of relativistic phenomena like mergers of neutron-star binaries (binary neutron stars and black hole-neutron star binaries), long-term evolution of the merger remnants, stellar collapse to a black hole/neutron star, and long-term evolution of accretion disks around a black hole/neutron star. 
(ii) deriving accurate gravitational waves from neutron-star binaries by numerical relativity simulation for a variety of neutron-star equations of state. 
(iii) modeling electromagnetic counterparts (kilonovae, short gamma-ray bursts, radio flare, precursors, etc) associated with neutron-star mergers. 
(iv) nucleosynthesis calculation associated with neutron-star mergers and stellar collapse. 
(v) modeling gravitational waves emitted in the supernova explosion/
proto neutron star evolution. 
(vi) studies for the formation processes of a variety of black holes (
stellar-mass, intermediate-mass, and supermassive black holes) and for gravitational-wave and electromagnetic signals associated with the formation processes. 
(vii) Stellar evolution calculation. Researching other topics (even for non-relativistic/non-computational astrophysics) is also encouraged. 

The researchers in the "Computational Relativistic Astrophysics" 
division can use high-performance computers at Max Planck Computing and Data Facility (MPCDF: https://www.mpcdf.mpg.de) and several clusters (sakura and yamazaki) in this division. 

For more details, please visit 
https://www.aei.mpg.de/2306007/postdoctoral-positions-in-computational-relativistic-astrophysics
The deadline for full consideration is December 9th, 2019. The positions will be available from any time after April 2020.

The Illinois Relativity Group is opening a postdoctoral research position in numerical relativity and relativistic astrophysics. You can find more details below and here:

https://hyperspace.uni-frankfurt.de/2019/09/04/postdoctoral-research-position-in-numerical-relativity-and-computational-astrophysics-at-university-of-illinois-at-urbana-champaign/