Our Team

How can our team assist you?

Meet OSA

Ellen Cosgrove

Dean of Student Affairs

Room RM 88

Ellen M. Cosgrove joined Yale Law School in 2015 as Associate Dean overseeing the Offices of Student Affairs and Career Development. Dean Cosgrove came to Yale with twenty years of experience in higher education as an Associate Dean and Dean of Students, first at the University of Chicago Law School (1995–2004) and then at Harvard Law School (2004–2015). A 1984 graduate of Mount Holyoke College, Dean Cosgrove spent four years in corporate and investment banking in New York before attending law school. She graduated from the University of Chicago Law School in 1991 and practiced law at LeBoeuf, Lamb, Greene and MacRae (an international law firm headquartered in New York City, now defunct) before transitioning into higher education. Dean Cosgrove currently is a trustee at the Practicing Law Institute, Inc., a nonprofit continuing legal education organization and serves on the Board of the National Association for Law Student Affairs Professionals. She previously served as a trustee of Mount Holyoke College, a director at Lawyers Concerned for Lawyers, Inc. (Massachusetts’ lawyers’ assistance program), and a member of the Executive Committee of the Association of American Law Schools (Student Services Division). Dean Cosgrove has been honored by the students at Chicago (2001), Harvard (2006, 2009, and 2011) and Yale (2017) with awards recognizing her contributions to the law school community.

Catherine Banson

Wellness Counselor (Non-clinical)


Catherine Banson is a social worker, former public interest attorney, expert in interpersonal communication skills, and mindfulness meditation teacher in training.

After graduating from Brown University in 1992 with a BA in American Studies, Catherine earned an MSW at the Silberman School of Social Work at Hunter College, CUNY in 1995. She lived the Cali life for one year at Berkeley Law (where she was so grateful for APALSA) and finished her legal studies at New York University School of Law in 1999. As recipient of an Equal Justice Works fellowship, Catherine represented immigrant survivors of domestic violence in NYC. Later, with a growing family, she transitioned to pro bono work, providing services to low income elderly in NYC and asylum seekers in Hong Kong where she lived from 2007-2020.

Along the way, Catherine qualified as a certified instructor of Parent/Teacher/Youth Effectiveness Training, imparting assertive communication and conflict resolution skills to hundreds of individuals in over 800 hours of group facilitation. Catherine is currently in the Mindfulness Meditation Teacher Certification Program with Jack Kornfield and Tara Brach. She is also accredited by EFT International to guide others in a stress management technique known as “tapping.”

In February 2020, Catherine moved to Branford, next door to her in-laws for whom she helps care. She relishes being back in the country — however “imperfect” home may feel at times, she remains hopeful and equanimous! Her partner and three kids are (very) tentatively training for a family marathon.

Chloe Bush

Director of Student Affairs

Room RM 86

Chloe Bush serves as Director of Student Affairs for the OSA of Yale Law. She is in New Haven by way of her hometown of Chicago. She is no stranger to New England as a Boston University graduate, where she worked in events & catering after earning her degree in Public Relations. Chloe was subsequently hired by the catering department at Harvard Law School (HLS). This afforded her the incredible opportunity to interact with every department on campus, which in turn solidified her love of working in an academic environment.

Chloe soon moved into the Dean of Students Office at HLS, bringing her working knowledge of Harvard Law to strengthen relationships for the Dean of Students Office across campus. She spent five years working closely with student leadership, 1L students & faculty, and the Class Marshals. In addition to 1L programming, she was responsible for planning & executing numerous events, including First Year Orientation. Realizing she had a passion for integrating the principles of dependable operations and public relations, Chloe took on dual roles at FogPharma and LifeMine Therapeutics. After a few years consulting for biotech and nonprofit organizations, Chloe is thrilled to be back in academia and New England. However, she holds serious doubts about New Haven's pizza being superior to Chicago's.

Yaseen Eldik

Director of Diversity, Equity and Inclusion

Room RM 92

Prior to joining Yale Law School, Yaseen Eldik practiced as a corporate attorney at the law firm of Skadden, Arps, Slate, Meagher & Flom LLP in New York City. At Skadden, Yaseen was actively involved with several employee affinity groups designed to express and enhance the firm's commitment to diversity. In addition to his day job, Yaseen is a video op-ed contributor to the New York Times Opinion section and Co-Chair of the Gucci Changemakers Council, the company's effort to promote diversity in the fashion industry. Yaseen is a 2016 graduate of Harvard Law School, where he was a lead coordinator of the 2015 Pan-Harvard LGBTQ Conference. He also joined other Muslim law students to launch an initiative called “Your Voice Matters” to encourage Muslim youth to engage in cross-religious and multicultural dialogue. Through the Harvard Negotiation and Mediation Clinical Program, he has represented clients as they sought to resolve workplace disputes. For his work supporting community and diversity, he received the David Westfall Memorial Award for Community Leadership.

Prior to law school, Yaseen studied psychology and sociology at Stony Brook University, where he received the Harry S. Truman Scholarship, and worked in the Obama Administration's White House Office of Faith-Based and Neighborhood Partnerships. His writings have appeared in The New York Times, the Stanford Journal of Civil Rights and Civil Liberties, the Harvard Negotiation Law Review Online, and on the White House blog.

Cat Kirchhoff

Assistant Director of Student Affairs

Room RM 90

Cat (she/her/hers) is the Assistant Director of Student Affairs. As part of this role, she works with committees, working groups, Peer Advocates and Dean's Advisors to help serve as a resource to assist students navigating Yale Law School and University resources. She also plans and executes activities including Orientation, Professionalism Programs, Academic Programs, Wellness Programs, and class-specific events. Cat joined the Office of Student Affairs after overseeing summer internships and professional development at Columbia Law School for students interested in government and public interest careers. Prior to that, she served as the National Community Education and Policy Associate at Lambda Legal. Cat has a dog (ha), Gatsby, who she always finds a way to mention in any and every conversation. She is also still on the lookout for a good cup of coffee in the state of CT -- recommendations are accepted on a rolling basis.

Christine Jolly

Student Activities Program Coordinator

Room RM 85

Christine is the Student Activities Program Coordinator. In her role, she acts as a support to OSA staff by assisting the in the daily operations of the office, while also tasked with helping to oversee the Yale Law Student Journals, student organizations and working heavily with YaleConnect.

Prior to working at at Yale Law School, Christine spent two years working at the State University of New York's Global Center in New York City as their Events Coordinator. She earned a Graduate Certificate in International Education Management, a Master of Science in Educational Policy and Leadership, and her Bachelor of Arts in Political Science all through the SUNY system at the State University of New York at Albany.

Marie Carrano

Senior Administrative Assistant

Room RM 85

Marie Carrano joined Yale University in 2005 and has been a team member in the Office of Student Affairs ever since. Reporting to the Director of Student Affairs, Marie manages the OSA Front Office and provides administrative support to the Dean of Students and OSA directors. In addition, Marie provides planning and logistical support for Orientation, student organization activities, student-run conferences, and processes all student organization expenses (reimbursements, booking speaker hotel rooms, ground transfers, etc.). Marie also serves as the assistant to the Dean of Facilities and assists with coordinating Commencement and end of year activities, including the Community Picnic and Graduation Banquet.

Prior to joining Yale, Marie worked for Bayer Pharmaceuticals for 15 years, where her most recent role was as a Meeting Planner. At Bayer, Marie worked and traveled with the Meetings Department Planning Team, planned and organized various Sales Meetings, Product Launches and Senior Executive Meetings both regionally and across the United States.

Marie is a New Haven native and presently lives in Morris Cove with her husband Philip and beloved Beagle Teddy. She has two grown daughters, loves to read, travel, go for long rides on her husband’s Harley Davidson, cook and bake for her family, friends and YLS students!