Heitmann is principal investigator of the ANL part of Computation-Driven Discovery for the Dark Universe, supported by DOE’s SciDAC program (for Scientific Discovery through Advanced Computing). Under the direction of Argonne’s Salman Habib, the multi-laboratory project is developing the computational and statistical tools supercomputers can use to help solve the dark-energy mystery. SciDAC is part of the Advanced Scientific Computing Research program in DOE’s Office of Science.