
The Applied Mathematics group in the Mathematics and Computer Science Division at Argonne National Laboratory seeks wellprepared candidates for up to four postdoctoral fellow positions in mathematical optimization. We seek applicants in the following areas (follow the links for the complete position descriptions and application details, only a CV is required to submit the initial application):  
(a) 
Modeling & Optimization Methods for Constrained Phase Retrieval
Constrained nonlinear optimization models and algorithms for largescale, structured inverse problems for phase retrieval. Requires a strong background in mathematical optimization (nonlinear programming, stochastic/robust optimization), numerical linear algebra, and applied mathematics. 
(b) 
Parallel MultiStart Optimization Software
Parallel, multilevel global optimization methods for simulationconstrained problems. Requires a strong background in numerical optimization, operations research, or stochastic methods, as well as experience in parallel computing. 
(c) 
Equilibrium Constraints and Nonsmooth Optimization
Numerical methods for nonsmooth optimization, including mathematical programs with equilibrium constraints (MPECs) arising from freeboundary PDEs and nonlinear sparse regression. Requires a strong background in nonsmooth analysis, variational inequalities/MPECs, and numerical optimization/linear algebra. 
(d) 
Mixed Integer Nonlinear Optimization with Simulation Constraints
Derivativefree mixedinteger nonlinear optimization. Requires a strong background in mixedinteger programming or derivativefree optimization. Some experience in both areas is desirable, as well as a solid background in numerical analysis. 
Openings are available immediately, but there is flexibility in start dates for highly qualified candidates. More information can be obtained from Sven Leyffer, Todd Munson, and Stefan Wild.  
Wilkinson Fellowship at Argonne  
The Mathematics and Computer Science (MCS) Division of Argonne National Laboratory also invites outstanding candidates to apply for the J. H. Wilkinson Fellowship in Scientific Computing. The appointment is for one year and may be renewed for another year.  
This fellowship was created in memory of James Hardy Wilkinson, F.R.S., who had a close association with the Mathematics and Computer Science Division as a consultant and guiding spirit for the EISPACK and LINPACK projects. The Wilkinson Fellowship is intended to encourage scientists actively engaged in stateoftheart research in scientific computing. Candidates must have received a recent Ph.D. prior to the beginning of the appointment. The benefits of the appointment include a highly competitive salary, moving expenses, and a generous professional travel allowance. For additional details, including past recipients, see http://www.mcs.anl.gov/careeropportunities/jhwilkinsonfellowship  
Some reasons to do a postdoc at Argonne  
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The MCS Division has strong programs in scientific computing, software tools, and computational mathematics. Of special interest are algorithms and software for linear algebra, optimization, differential equations, computational differentiation, stochastic systems, and unstructured mesh computations; software tools for parallel computing; and numerical methods for computational science problems. For further information, see http://www.mcs.anl.gov/LANS/ .
Internationally recognized for innovative research in highperformance computing, the MCS Division supports an excellent computational environment that includes large Linux clusters, a distributed systems laboratory, and a virtual environments laboratory. Researchers also have access to a Blue Gene/P supercomputer. For more information, see www.mcs.anl.gov .  
¤ Argonne is located in the southwestern Chicago suburbs, offering the advantages of affordable housing, good schools, and easy access to the cultural attractions of the city.  
¤ Argonne named 5th Best Place in the US to do a Postdoc in 2013  
¤ Argonne Hockey Club  
¤ Argonne Ultimate Frisbee Club (some photos from summer 2013)  
¤ Other clubs at Argonne  
Opportunities for students  
¤ PhD students: Wellprepared students are always welcome as Givens Associates (some photos from LANS Givens fellows, summer 2013) 