Meet some of the people behind Gurobi

The computational progress in linear and mixed integer programming over the last twenty years has been nothing short of remarkable, enabling business, scientific and other applications that literally would have been unapproachable just a few short years ago. The Gurobi founders have been at the forefront of these developments.

The Gurobi team is committed not just to providing the best technology now available, but to continuing to push forward the frontier of optimization solution capability.

Robert Bixby

President and Co-founder

Robert Bixby, President and Gurobi Co-founder

Dr. Robert Bixby has a BS in Industrial Engineering and Operations Research from the University of California, Berkeley, and a PhD in Operations Research from Cornell University. He has held academic positions at the University of Kentucky, Northwestern University, and Rice University. He is currently Noah Harding Professor Emeritus of Computational and Applied Mathematics at Rice, and Research Professor of Management in Rice’s Jones School of Management.

Dr. Bixby has published over fifty journal articles, and is an acknowledged expert on the computational aspects of linear and integer programming. He has won several awards for his work in optimization, including the Beale-Orchard-Hays Prize of the Mathematical Programming Society, and the INFORMS Impact and Frederick W. Lanchester Prizes. In 1997 he was elected to the National Academy of Engineering for his contributions to the theory and practice of optimization.

Dr. Bixby has over twenty years of experience in the optimization software business. He co-founded CPLEX Optimization, Inc., in 1987. CPLEX was acquired by ILOG, Inc., in 1997, after which he served on the ILOG Board of Directors, manager of the ILOG CPLEX Development Team, President of the ILOG Technical Advisory Board, and General Manager of ILOG’s Semiconductor Business Division.

Zonghao Gu

Chief Technical Officer and Co-founder

Zonghao Gu, CTO and Gurobi Co-founder

Dr. Zonghao Gu has a B. Eng. in Mechanical Engineering and an M. Eng. in Industrial Management from Tongji University, Shanghai. He has a PhD in Industrial Engineering from the Georgia Institute of Technology.

Dr. Gu has published several papers on the computational aspects of mathematical programming. He is currently a Technical Editor for Mathematical Programming Computation. He is one of the world’s leading experts on the computational aspects of linear, integer, and quadratic programming, and is particularly well known for his deep understanding of cutting planes and their application to the solution of general mixed-integer programs.

Dr. Gu worked from 1995 to 1998 as an optimization software developer for LINDO Systems, Inc., before joining the ILOG CPLEX R&D team in 1998 as a senior software developer and later as a Distinguished Scientist. From 2005 to 2008 he was Project Architect for the CPLEX R&D team and was the lead developer for CPLEX 11. He was responsible for the implementation of the CPLEX QP simplex and MIQP solvers, had primary responsibility for the presolve and cutting plane routines, and made various contributions to the CPLEX LP simplex solver.

Edward Rothberg

Chief Operating Officer and Co-founder

Edward Rothberg, COO and Gurobi Co-Founder

Dr. Edward Rothberg has a BS in Mathematical and Computational Science from Stanford University, and an MS and PhD in Computer Science, also from Stanford University.

Dr. Rothberg has published numerous papers in the fields of linear algebra, parallel computing, and mathematical programming. He is one of the world's leading experts in sparse Cholesky factorization and computational linear, integer, and quadratic programming. He is particularly well known for his work in parallel sparse matrix factorization, and in heuristics for mixed integer programming.

Dr. Rothberg worked from 1992 to 1994 as a computational scientist in the Intel Supercomputing Systems Division, and from 1994 to 1997 as a supercomputing application specialist at Silicon Graphics, Inc. He joined CPLEX in 1997, working as a Senior Developer for a year before becoming the Senior Director of CPLEX R&D. He led the CPLEX team through the development of CPLEX 7-10, and was also responsible for the implementation of the current CPLEX Barrier solver, the CPLEX QCP solver, and several of the cutting plane and heuristic methods in the CPLEX MIP solver.

Tracy Pesanelli

Vice President of Worldwide Sales

Tracy Pesanelli, Gurobi VP Sales

With more than 25 years of sales and sales management experience in the high tech industry, Ms. Pesanelli is responsible for driving Gurobi's sales execution. Most recently, Ms. Pesanelli was Sales Director at Permabit Technology Corporation, a manufacturer of disk based enterprise archive solutions. Prior to Permabit, Ms. Pesanelli held various sales and sales management positions at ILOG, Inc. from January 2000 to September 2008. Selling ILOG's Business Rule Management System and CPLEX Optimization product lines, Ms. Pesanelli consistently exceeded sales expectations and was a top performer world-wide.

Ms. Pesanelli holds a Bachelor of Science degree from the University of Massachusetts at Amherst.

Christopher Riche

Vice President of Marketing

Chris Riche, Gurobi Vice President of Marketing

Mr. Riche has an MBA in Marketing and an MS in MIS with a concentration in decision support systems, both from the University of Arizona. Post graduate school, Mr. Riche joined Procter and Gamble in Brand Management and went on to hold leadership roles there and then for Intuit on the Quicken Services, QuickBooks payroll, and TurboTax businesses. Prior to joining Gurobi, Mr. Riche led marketing for Frontline Systems, makers of the leading optimization and risk management tools for Excel.

Mr. Riche has helped deliver record revenue and/or profit on every business he has been on, including turnaround situations, by working cross-functionally to understand the market, build effective strategies, and execute against them.

Gregory Glockner

Director of Engineering

Gregory Glockner, Gurobi Director of Engineering

Dr. Gregory Glockner has a B.S. magna cum laude from Yale University in Applied Mathematics and Music, and an M.S. and Ph.D. in Operations Research from the Georgia Institute of Technology. His doctoral dissertation was awarded the 1997 Transportation Science Dissertation Prize from INFORMS.

Dr. Glockner has trained users of optimization software in Brazil, Hong Kong, Japan, Singapore, South Korea, and throughout the USA and Canada. He is an expert in optimization modeling and software development: his professional experience in software development includes all major platforms and 9 of the top 10 programming languages in the TIOBE Programming Community Index.

Prior to joining Gurobi Optimization in 2009, Dr. Glockner was partner and Chief Operating Officer for Dwaffler, a provider of decision analysis tools. From 1998-2007, he worked at ILOG in two different positions: as a Senior Technical Account Manager and a Product Manager. As an ILOG Senior Technical Account Manager, he introduced advanced optimization and rules software to customers across North America. As an ILOG Product Manager, he was responsible for product management of CPLEX, ODM, OPL and Solver. From 1997-1998, he worked at Pacific Gas & Electric, where he developed stochastic programming software for hydroelectric power scheduling, and he built statistical tools for energy trading in the deregulated energy market. He has also worked as an operations research analyst for the Federal Aviation Administration and for Northwest Airlines.