
Our GMAT, GRE, & EA Tutors
GMAT Ninja’s team of GRE, GMAT, and EA tutors includes a novelist with 20 years of test-prep tutoring experience, an accomplished surfer with a 790 GMAT score, an ex-management consultant and semipro poker player, a former Army captain and West Point graduate, a former semipro rugby player, and an ex-professional dancer with perfect scores on the GRE and GMAT.
So if you’re looking for help improving your GMAT score, you’ll be in good hands with our interesting, experienced GRE and GMAT tutors.
our tutors

Charles Bibilos
Charles Bibilos is one of the world’s most accomplished independent GMAT instructors, with nearly 20 years of experience as a classroom teacher and private tutor.

Mike Maietta
The proud owner of a 790 on the GMAT, Michael graduated summa cum laude in Mechanical Engineering, and is an experienced teacher, writer, and management consultant.

Dave Goldstein
Dave has taught test prep since 2004, winning teacher-of-the-year awards from two major test-prep companies before joining GMAT Ninja.
DANA STEPLETON
Dana is a West Point graduate and former Army captain who has earned a 780 on the GMAT, in addition to 99th percentile scores on the GRE, SAT, and ACT.
HARRY DUTHIE
Harry is a Scotland-based former semipro rugby player with 770 on the GMAT. He has been known to tackle or bench-press students who fail to complete their GMAT homework.
ALEX COTTON
Our resident renaissance man, Alex has a background in biology, journalism, fiction writing, and jazz piano, in addition to 15+ years of tutoring experience and a perfect score on the GMAT verbal section.
TIM HESLER
Tim holds three graduate degrees – an MBA, a JD, and a Master’s in Education – and a 780 on the GMAT, along with 99th-percentile scores on several other standardized exams. He has also designed and taught basketball history and culture courses for high school students.
JOHN MICHAEL MACDONALD
John Michael is one of the world’s most versatile teachers, with more than two decades of experience teaching standardized test prep, history, literature, and theater, among other topics. John Michael is also an accomplished actor, with more than 25 professional credits over the course of his career.
Shaun Veran
Shaun is a UCLA-trained microbiologist, biotech innovator, and 99th percentile GMAT scorer who now brings his startup smarts to test prep. He’s helped hundreds of students succeed—with science, strategy, and enough swagger to get one of his products on Law & Order.
Bransen Vilardo
Fluent in Hebrew, Greek, and Arabic, Bransen scored a 790 on the GMAT and left banking to teach. He pairs sharp verbal insight with pastoral patience—and might explain GMAT passages in three languages over hummus.
YOU
FUTURE GMAT TUTOR
Do you love teaching? Do you enjoy crushing standardized tests, even if you’re embarrassed to admit it to your friends?
Let’s work together!