
Sean Selinger founded 800score in 1999 with the vision of creating elite test prep accessible to a broad range of students from all economic backgrounds. Sean Selinger attended Cornell University and was a Cornell National Scholar (the top 50 in his class of 3500). Sean also attended Oxford University and Cornell Law School. He scored a perfect score on the SAT and GMAT quantitative sections. 



Dr. Steven Alexander (Yale, MIT, PhD Mathematics.) Senior Developer. 800 GMAT, 800 SAT, 800 GRE. Steve is passionate about Mathematics and translating ancient greek texts. He studied philosophy at Yale and later earned an PhD in mathematics at MIT. His mathematical interests are in foundational dynamics and in differential geometry. 


Ian Simpson runs the tutoring company Integrated Learning and has taught hundreds of GMAT students. He is a UCLA graduate with a perfect 800 score on the GRE Math section and a 770 on the GMAT. 


Rebecca Pronsky (Brown U. BA) Professional test tutor in New York City specializing in Verbal and essay prep. Rebecca grades 800score essays and helps with development. 


Ajeet Khurana is About.com's GMAT expert and has published books on preparing for the GMAT through McGraw Hill. 


Crowan Robers
Scored a 790 on the GMAT and runs a tutoring company in San Francisco. Crowan is a verbal specialist and got a perfect score on the GMAT verbal section. 

Heather Johnston is a mathematics professor at Vassar College. She attended Princeton University at age 14 and has a mathematics degree from MIT. She got a perfect score on the GMAT Quantitative section. 

Josh Rolnick (Brown University BA / Oxford University.) 99th percentile on the SAT, GRE, GMAT, and LSAT and 3 years experience as a test prep tutor. 

Margaret Hellerstein (Brown U, BA / Yale Law) 

Whitney Seibel (Yale U. BA, NYU MBA) 800 SAT, 750 GMAT 

Thomas Flaherty (Harvard U. BA) 
