Mike Diamond

Co-Founder & Director of Curriculum Development - ieGAT & INSEAD Assessment Instructor

Mike Diamond is Apex’s Head of Instruction and Director of Curriculum Development. Mike comes to the GMAT from the diverse locales of the campaign trail, Wall Street, and the classroom. At Apex, he develops instruction that is designed to be customized to the cognitive profiles of each of our clients, while recognizing and addressing the psychological and emotional components of the GMAT as well. Mike has a strong grounding in advanced mathematical modeling specializing in non-linear mathematics, stochastic calculus and statistical analysis.  

With over 20 years’ experience in test preparation, Mike has personally mentored hundreds of clients to 700+ GMAT scores.

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James Armstrong

Apex GMAT Senior Instructor

James loves teaching. He derives great satisfaction from helping students overcome the academic and emotional hurdles that stand between them and their goals. To that end he draws upon his years teaching mathematics at Harvard University’s Extension School, his experience as a writing coach and English tutor in Europe, and his personal involvement advising numerous students along their paths.

Christopher Wilson

Apex GMAT & Executive Assessment Instructor

Christopher joins the Apex Team with over 10 years of experience in education and project management. His clients have ranged from Fortune 50 corporations to undergraduate students. With vast experience in the test preparation industry, Christopher has a deep understanding of the GMAT and prides himself on delivering custom experiences and successful outcomes for his clients.

Over the years, Christopher has found that he prefers to specialize instruction for those to whom it has highest impact and is keen to guide our clients to GMAT successes.

Elijah Mize

Apex GMAT Instructor

For Elijah, challenging tests like the GMAT are a guilty pleasure-turned-profession. When acing the tests just wasn’t enough anymore, he started helping university applicants achieve their own scholarship-winning scores on the SAT and ACT. When Elijah found a test that adapts to push you to your limits (the GMAT), he fell in love. In his work as a GMAT tutor, Elijah employs two key test-taking skills: perceptiveness and adaptability. He is able to quickly learn clients and tailor his instruction to suit any personality and learning style. When he isn’t working for Apex, Elijah stays busy studying Japanese and playing chess online.

Jaymes Kine

Apex GMAT Instructor

Jaymes Kine is Apex’s international man of mystery. In his 10 years of teaching, he has taught a variety of subjects in locations all around the globe, from marine science in Alaska, to English and math in Spain, to test prep in Israel. At Apex, Jaymes indulges his passion for helping students reach that “ah ha” moment, and his diverse teaching experience helps him connect to people of all skill levels from all backgrounds. He believes that a personal connection between student and teacher is imperative to successful preparation, and strives to make that connection with each of his students, whether in private lessons or a seminar setting.

Iva Todorova

Lead Admissions Consultant & Apex Economics Instructor

Iva comes to Apex with a strong background in the banking industry, focusing on credit risk and investment banking. With previous experience putting together teams from the hiring to project completion phase she has vast experience when it comes to helping clients frame the best possible narrative for the role that they desire. Iva is a passionate mentor and coach, committed to developing the next generation of leaders. She focuses on advising students with career planning and development, personal branding, interview preparation, resume & cover letter assistance and LinkedIn profile framing.

Before working with us Iva spent over 5 years working for Morgan Stanley where she established and trained a team responsible for a combined portfolio of $38 Billion, and directly oversaw the production of over 250 credit reviews per annum.

David Bernstein

Dr. David Bernstein

Lead Economics Instructor

David is Apex’s lead Economics tutor and has a robust background in the field of study. He has earned a Master of Philosophy in Economics from the University of Oxford and a BA in Mathematics and in Economics from Brandeis University. He is currently in his fifth year as a doctoral candidate at the Department of Economics and the University of Miami. Over the course of his education he has published research in leading economics and econometrics journals including Energy Economics, and Econometrics. His interests in the subject include Energy Economics, Statistical Theory and Financial Economics.

At Apex, David assists clients with general and more advanced economics tutoring including thesis consulting, academic advice and topic and exam preparation. Clients benefit from his depth of understanding of the topics and personable teaching style.

Apex GMAT Engagement Manager

Fatma Xhafa

Engagement Manager

Fatma Xhafa joins the Apex team as the Academic Engagement Manager. She has completed degrees in Computer Science and Business Administration. Her experience includes working in several customer service roles which require strong communication skills. She brings with her leadership skills as she has experience as the Head of Speakers Department and the Vice President of [email protected], leading teams of 10 and 40 people, respectively.

She joined the Apex team as an intern in March 2020 where she was responsible for multiple marketing and IT related duties. As an Engagement Manager, she now manages the communication between staff and clients and monitors client activity, handles invoicing and sales to provide a positive experience for our clients.


Sarin Sulahian

Engagement Associate

Sarin Sulahian joins the Apex team as an Engagement Associate. She began as a marketing intern in September 2021 and has transitioned into her current role. She is currently pursuing a degree in Business at the American University of Armenia. She has experience in marketing research and influencer marketing. She is an alumni at The European Youth Parliament where she has participated in various sessions debating EU policies.

In her current role, she takes care of customer relationship management, as well as handles communication between staff and clients.

Uerda Muça

Marketing Manager

Uerda joins the Apex team as the Marketing Manager. She has completed degrees in Business Administration and Economics at the American University of Bulgaria. She began as an intern in December 2020 and has since transitioned into her current role.

In her current role, her primary duties include paid advertising, SEO, team management, Social media marketing and other marketing related activities.

Jennifer Burd

Content Editor

Jennifer began at Apex as an administrative assistant in 2016, and returned as a content editor in 2020. She is an undergraduate instructor and PhD candidate in Temple University’s English department. Her dissertation research addresses medical rhetoric in the 18th-century Atlantic world. Recent fiction and essays have appeared in Bedfellows Magazine and the Philadelphia Secret Admirer. She lives in Philadelphia.

In her role she reviews and edits all our GMAT, EA and Admissions related content before it is published.

Bhavna Vaid

IT Consultant

Bhavna joined the Apex team in 2019 and is in charge of all IT related matters. She has been IT consultant for over 9 + years and has extensive experience in building/managing softwares, websites and apps for corporations from various industries and has worked for Multi National Companies  like Siemens, HDFC India and NS&I bank in the UK assisting in automating their business processes.

In her role she oversees all the company’s IT needs.