Princeton Diplomatic Invitational Executive Board

Meet the leadership team behind the third iteration of PDI.


Kris hristov, executive director

Kris Hristov is a rising Junior in the Woodrow Wilson School of Public Policy and International Affairs focusing on Eastern Europe and global security. He speaks English, Bulgarian and Russian. Kris has served on the conference since the first Princeton Debate Invitational as a crisis director, Director General and now Conference Director for PDI III. Outside of Model UN Kris is involved in the Bulgarian Undergraduate Society and the Daily Princetonian newspaper. His interests include taking over the world and 80’s action films.


Martha yin, Director of external affairs

 Hello everyone! My name is Martha, and I am beyond excited to be serving as this conference’s Chargé D'Affaires. I was born in Toronto, Canada, but I grew up in the lovely and deeply southern city of Montgomery, Alabama. Currently, I am a sophomore at Princeton majoring in Operations Research and Financial Engineering. On campus, I am involved with the Pace Center for Civic Engagement, China Social Impact Project, and Club Swim. This spring, I also served as Assistant Administrative Director for NHSMUN, the world's largest Model UN conference. I love traveling, eating, and combining the previous two activities by taking spontaneous trips to New York and Philadelphia to sample earl grey cream puffs, golden spice lattes, crab soup dumplings, and burger-grilled cheese sandwich hybrids. Let me know if you have any good food recommendations, and I cannot wait to meet you all at PDI!


Daniel vogler, deputy director of external affairs

I am a junior majoring in philosophy with minors in finance and computer science. On campus, I’m a member of Princeton’s Model UN team and American Whig-Cliosophic Society. This past fall, I served as a crisis director for PMUNC, Princeton’s high school Model United Nations conference. I look forward to working with you all to ensure that PDI is a fun and rewarding experience for everyone involved.


Courtney cappelli, chief of staff

Hello everyone! I’m Courtney, your Chief of Staff. I’m a sophomore from California (though, believe it or not, from neither Los Angeles or the Bay Area) and a STEM dropout planning to major in the Woodrow Wilson School. In addition to being a member of the Model UN team here at Princeton, I quite enjoy reading the evidence code with my Mock Trial team, working with the Princeton University Nonprofit Consulting group, occasionally visiting my room to sleep, and spending time with your beautiful and wonderful Board of Directors. I can’t wait to see you all in November!

harry shapiro, director-General

Welcome to PDI! My name is Harry Shapiro, and I'm incredibly excited to be your Director-General. I'm a sophomore from Chicago majoring in Mechanical & Aerospace Engineering with certificates in the History & Practice of Diplomacy and Engineering & Management Systems. I am also a deputy captain of Princeton's Model UN travel team and compete actively on the college circuit, in addition to being the treasurer of the Princeton Rocketry Club. In my free time, I run and fly light aircraft. If you have any questions about Princeton, college MUN, engineering, or planes, I'll be happy to answer them! We've got an A+ team assembled for this conference, and I look forward to meeting you in March!

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isabella impalli, director of Operations

My name is Isabella Impalli, and I am so excited to serve as the Director of Operations for PDI III! I hail from Northern New Jersey and am a member of the Princeton Class of 2022. At Princeton, I plan to major in either Classics or Architecture. Outside of Model UN, I serve as the Secretary for Princeton’s Sailing Team. I am so excited for the conference, and I can’t wait to meet you all! Please feel free to email me with any questions (


emily Lang, oversight, IRC President

Hello everyone! I’m Emily, and I’ll be serving in the Oversight position for PDI III.  I’m a junior from Rochester, NY in the Politics Department with intended certificates in Statistics & Machine Learning and History & the Practice of Diplomacy. At Princeton, I’m the President of the International Relations Council, a member of the MUN Team, and I’ve served on the Secretariat for both PMUNC and PDI. I’m also a freshman orientation leader with the Dialogue and Difference in Action Program, work in the Office of International Programs, and serve as an Advising Fellow with the nonprofit Matriculate. In my free time, you can find me napping in weird places or downing coffee to stay awake. So excited to see everyone on campus for PDI!