| Regina Ragan | Assistant Professor, Chemical Engineering and Materials Science | (949) 824-7385 Lab (949) 824-6830 Office rragan@uci.edu |
| Roger Rangel | Professor, Mechanical and Aerospace Engineering | (949) 824-3790 Lab rhrangel@uci.edu |
| Ashok Rao | Chief Scientist, Power Systems, Advanced Power and Energy Program | (949) 824-7302 x345 Office adr@apep.uci.edu |
| Wilfred Recker | Professor, Civil and Environmental Engineering | (949) 824-5642 Office 1 (949) 824-6848 Office 2 wwrecker@uci.edu |
| David Reinkensmeyer | Professor, Mechanical and Aerospace Engineering | (949) 824-5218 Office (949) 824-8057 Lab dreinken@uci.edu |
| Peter Rentzepis | Presidential Chair and Professor, Chemistry | (949) 824-5934 Office pmrentze@uci.edu |
| Leyla Riley | Director, Math Engineering and Science Achievement | (949) 824-1578 Office ldnewton@uci.edu |
| Stephen Ritchie | Professor, Civil and Environmental Engineering | (949) 824-4214 Office sritchie@uci.edu |
| Joe Rizkallah | EH&S Safety Coordinator, Dean's Office | (949) 824-6579 Office jar@uci.edu |
| David Romero | , Integrated Nanosystems Research Facility | (949) 824-8239 dromero@uci.edu |
| John Romine | Director of Computing, Dean's Office | (949) 824-7554 Office jromine@uci.edu |
| Diego Rosso | Assistant Professor, Civil and Environmental Engineering | (949) 824-8661 Office bidui@uci.edu |
| Cecilia Ruiz-Smith | Website Designer/Coordinator, Advanced Power and Energy Program | (949) 824-7302 x117 Office crs@apep.uci.edu |
| John Rupp | Financial Analyst, Mechanical and Aerospace Engineering | 949-824-8328 njrupp@uci.edu |