Meet Our Subject Matter Experts

Bill Busineau is a Senior Director at Quadrangle. He is an attorney with over 20 years in the financial industry with experience in a wide variety of trading and investment products, as well as the various laws and regulations that impact those products. His experience prior to Quadrangle included positions at Citigroup, Credit Suisse, HSBC, and RBS and work as an associate in the structured finance / derivatives departments at the law firms of Schulte Roth and Zabel, and Cadwalader, Wickersham & Taft.  Prior to attending law school, Bill spent a combined 6 years in Haiti first as a Peace Corps Volunteer and then as a Regional Director with the OAS/UN International Civilian Mission.

Bill received his AB from Colby College and his JD from Fordham University School of Law.

Hans Gibson is a Senior Director at Quadrangle. He has spent over 30 years of his career in the documentation of trade and financing agreements (mainly in the derivatives and Prime Brokerage industries) with investment funds, large and small corporations, and high-net-worth individuals.

Prior to Quadrangle, Hans was a director at UBS AG where he was responsible for the documentation of ISDA Agreements, along with being part of the team that instituted a new documentation tracking and reporting system. Hans also learned and negotiated Prime Brokerage and Repurchase Agreements, along with the Master Equity Confirmation. Prior to UBS, Hans spent 8 years as an Associate at JPMorgan where he focused on derivatives documentation with European companies and high-net-worth individuals.

Hans received a BA from Connecticut College and a Certificate of Accounting from Fairfield University.

Steve Hennessy joined Quadrangle in 2025 as Director of Account Management. In this role, he is responsible for business development and overseeing client relationships to ensure a positive and engaging experience. Prior to joining Quadrangle, Steve held several leadership positions in Account Management at Enfusion and Omega Point. Earlier in his career, he gained valuable experience in both buy-side and sell-side roles, starting at Northern Trust in Chicago.

Steve holds a BS in Business Administration from Marist College and an MBA from DePaul University.

Matthew Merrill is a Senior Vice President at Quadrangle, where he has worked since 2018. He is primarily involved in negotiating derivatives documentation as well as vendor agreements. Prior to Quadrangle, Matthew worked at New Oak, a consulting firm that specializes in mortgage-backed securities litigation.

Matthew received a BS in Psychology from Michigan State University and his JD from New York Law School.

Joe Angelo Zanghi is a Senior Associate at Quadrangle who joined in 2023.  Prior to Quadrangle, Joe worked at a large plaintiff personal injury firm in Brooklyn handling almost all court documentation for client matters, from Summons and Complaints to Summary Judgment Motions. Most recently, Joe worked at a large financial institution in Third Party Risk Management, where he specialized in organizing, gathering, analyzing, tracking, negotiating, and building out databases for vendor agreements.

Also a native New Yorker, Joe received his BA in Political Science from Baruch College and later his JD from New York Law School.  He joined the New York City State Bar in March of 2021.

Gianna Scotti joined Quadrangle as an Associate in 2024. In law school, Gianna was an affiliate of New York Law School’s Center for Business and Financial Law and an active member of New York Law School’s Dispute Resolution Team. As a member of the Dispute Resolution Team, Gianna represented her school at nationwide negotiation and arbitration competitions. Prior to Quadrangle, Gianna worked as an Associate Attorney at Pitta & Baione LLP representing 9/11 victims in their claims to the September 11^th Victim Compensation Fund.

Gianna graduated summa cum laude from Kutztown University’s College of Business and later received her JD from New York Law School. She joined the New York State Bar in June of 2023.

Paulina Jedrzejowski joined Quadrangle as an Associate in 2024. In law school, Paulina was the Executive Articles Submission Editor of the Brooklyn Journal of International Law and a member of the Vis International Commercial Arbitration team of the Moot Court Honor Society. During law school, she also interned at the New Jersey Bureau of Securities, Michele Kern-Rappy Dispute Resolution, Eldridge, the International Institute for Conflict Prevention & Resolution, and QBE Americas. Before law school, Paulina worked as a corporate paralegal at Paul, Weiss, Rifkind, Wharton & Garrison LLP.

Paulina graduated cum laude from Tufts University with a BA in International Relations, Economics, and Portuguese. She received her JD with cum laude honors from Brooklyn Law School. During her free time, she enjoys exploring new restaurants, travelling, and reading. 

Riley Coyne is a Vice President who joined Quadrangle in 2019. He focuses primarily on project management and data analysis. Additionally, Riley spearheads many new technology projects, acting as a liaison with the development team. Prior to his time at Quadrangle, Riley worked at Castle Hill Capital Partners in capital introduction for endowments, pension funds, and foundations.

Originally from Cleveland, Riley graduated magna cum laude from Fordham University with a degree in finance, fintech, and economics. Outside of work, Riley loves playing music and new technology.

Grace Janosik is a Senior Analyst who joined Quadrangle in 2021 after interning during her last semester before graduation. She primarily focuses on internal project management, marketing, and technology development.

Originally from Cleveland, Ohio, Grace attended Fordham University and graduated summa cum laude with a degree in information systems, mathematics, and business law and ethics.

Paige Duncan joined Quadrangle as an Analyst in 2023. At Quadrangle, she focuses on project management and sales endeavors. Before joining the team, she worked for four years in the technology industry as an account manager.

Originally from Long Island, New York, Paige achieved her undergraduate degree in business management from the University of Tampa. She then advanced her educational journey at LIM College, successfully earning a Master of Professional Studies in Marketing.

Kim joined Quadrangle as an Executive Assistant in 2024. Kim directly assists the team with administrative tasks and has relevant experience supporting high level executives in the financial industry. Kim provides logistical support, coordinates scheduling and communications, and helps ensure organization and efficiency in the firm’s operations.

Originally from Marlboro, New Jersey, Kim graduated from UMass Amherst in 2022 with an undergraduate degree in Hospitality & Tourism Management. In her personal time, she enjoys creating art and playing with her cat.