Alumni Pr<strong>of</strong>ilesGSAS catches up with some <strong>of</strong> the school’s alumniAri BuchalterAstronomy Ph.D., 1999What are you doing now?I am currently Chief Operating Officer<strong>of</strong> MediaMath, a digital media technologycompany. Our plat<strong>for</strong>m helps advertisers<strong>and</strong> agencies figure out wherethey should buy ads <strong>and</strong> how to pay <strong>for</strong>them, execute the buy, <strong>and</strong> analyze theresults. I also advise a number <strong>of</strong> technologystartups in the New York area.Why did you choose your degreeprogram <strong>and</strong> <strong>Columbia</strong>?After completing my undergraduatestudies in physics at Stan<strong>for</strong>d University,I took a year <strong>of</strong>f to work part-time,travel, <strong>and</strong> generally see if the worldcould dissuade me from my long-timeinterest in pursuing a graduate degreein astrophysics. It couldn’t. So when itcame time to apply to programs, I wasdriven by two factors: first, wanting atop-tier program, <strong>and</strong> second, wantingto be closer to New York City, myhometown. <strong>Columbia</strong> was the obviouschoice.What was your research focus?My Ph.D. research was in theoreticalcosmology—underst<strong>and</strong>ing theorigin <strong>of</strong> the universe. There werethree different areas <strong>of</strong> investigation:describing the statistics <strong>of</strong> how matterin the universe evolved from a relativelysmooth distribution to the structureddistribution we see today; improvingan observational test <strong>of</strong> the expansion<strong>of</strong> the universe that used a type <strong>of</strong> radiogalaxy as a unit <strong>for</strong> measuring distance;<strong>and</strong> identifying large-scale clusters <strong>of</strong>galaxies from data from a radio survey<strong>of</strong> the sky. After my degree, I pursueda postdoctoral fellowship in theoreticalastrophysics at Caltech, where I did researchon the <strong>for</strong>mation <strong>and</strong> evolution<strong>of</strong> galaxies <strong>and</strong> on the properties <strong>of</strong> cosmicmicrowave background radiation.What did you like most <strong>and</strong> leastabout your time as a student atthe <strong>Graduate</strong> <strong>School</strong>?I enjoyed having the latitude to workon a wide range <strong>of</strong> research topics thatinterested me, <strong>and</strong> the chance to do sowith brilliant <strong>and</strong> supportive faculty.I didn’t mind the trips to Sicily or theFrench Alps <strong>for</strong> conferences, either.I enjoyed the subway ride least,given that I lived downtown.How did you get into yourcurrent field?When I finished my Ph.D., I had everyintention <strong>of</strong> continuing on the traditionalacademic path from a postdoc ortwo to tenure <strong>and</strong> a full pr<strong>of</strong>essorship.A year into my postdoc, the financialmarkets were booming, <strong>and</strong> I developedan interest in financial derivativesmodeling. At first it was a purely mathematicalinterest, but as I started toapply it in practice as a part-time trader,I met with success.I decided a few months later to starta small hedge fund, which I ran whilepursuing my postdoctoral studies. Itwas invaluable experience in starting<strong>and</strong> running a business <strong>and</strong> it openedmy eyes to the worlds <strong>of</strong> finance <strong>and</strong>business. After much deliberation, Idecided to explore it further, leavingacademia <strong>and</strong> the hedge fund behindto apply <strong>for</strong> quantitative trading positionsat various investment banks. I was<strong>of</strong>fered a job as a general consultant. Inmy work, I found myself drawn to media.I spent a majority <strong>of</strong> my years workingin the media practice with a focuson digital media, innovation, marketinganalytics, <strong>and</strong> consumer marketingstrategy.After nearly a decade working atlarge- <strong>and</strong> medium-sized companies,I decided to join a friend who waslaunching a new technology startup—MediaMath—which seemed like theperfect chance to blend the skills I haddeveloped over the prior decade.Link back to contents page34 Superscript
How have you applied your degreework to your career development<strong>and</strong> current position?The business world, <strong>and</strong> marketingin particular, is increasingly beingdriven by data <strong>and</strong> analytics, so a strongquantitative background is a unique<strong>and</strong> valuable asset. A few years into mytime as a consultant, I started to explorethe application <strong>of</strong> advanced quantitativemethods to business problems suchas customer segmentation <strong>and</strong> predictivemodeling <strong>of</strong> consumer behavior.I found that I not only enjoyed it butwas valued <strong>for</strong> the ability to “bridge thegap” between designing <strong>and</strong> buildingapproaches <strong>and</strong> putting them to practicalapplication while explaining them tonon-technical audiences.In my current job, I’ve also put myquantitative skills to use by designingour bid optimization algorithm that determineshow much advertisers shouldbid on different types <strong>of</strong> ads based onthe data associated with those ads <strong>and</strong>each advertiser’s goals.Have you found your field surprisingin any way?The things that drive success in thebusiness world are different from whatdrives success in academia. In theacademic world, research success <strong>of</strong>tencomes from applying highly specializedknowledge <strong>and</strong> skills to a very specificaspect <strong>of</strong> a discipline to discover somethingoriginal. The business world isless about originality <strong>and</strong> more aboutimpact. Decisions have to be madequickly <strong>and</strong> <strong>of</strong>ten on little to no data,<strong>and</strong> much <strong>of</strong> achievement hinges onpractical judgment, common sense,<strong>and</strong> people skills.What are the most challenging<strong>and</strong> most satisfying aspects <strong>of</strong>your work?What I enjoy most is working witha highly talented team in a dynamicsector <strong>of</strong> the market. There’s a sense <strong>of</strong>electricity. We’re building somethingthat could be big, that could change theway marketing is done. The most challengingis prioritizing in a fast-movingmarket.If you could give advice to currentstudents, what would it be?Don’t plan more than two years ahead.Plan to spend the next two years doingsomething you enjoy <strong>and</strong> are excitedabout, <strong>and</strong> do a great job at it. Build astrong network <strong>of</strong> contacts, colleagues,<strong>and</strong> mentors. Opportunities presentthemselves to people who arepassionate, talented, <strong>and</strong> plugged intothe world around them.Superscript 35Link back to contents page