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Meet The Team

Who we are
The ISS team comprises of education, business, and technology experts from around the globe, all devoted to making a world of difference in the international education sector. With decades of experience leading international schools, ISS leaders collectively bring deep, practical knowledge of all aspects of school management and educational best practices.

Desiree Bryant

Director of Human Resources/Office Management

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Desiree provides strategic, business-focused human resource services across ISS, while maintaining a strong commitment to supporting employees and clients in the U.S. and internationally. Desiree joined ISS in 1998, bringing her experience in human resources and well as a unique international perspective. Desiree first fell in love with int’l travel when she enlisted in the US Air Force on a dare, and as an Aerospace Ground Equipment mechanic, traveled to Guam, Florida and Panama. She holds a BS Degree in Human Resources Management from Rider University. When not biking and hiking around exotic sites for their anniversary, Desiree and her husband Bryan reside in Hamilton Square NJ with their two dogs Izzy and Abby. In her free time, Desiree enjoys NYC, cooking, eating, and sometimes, going to the gym.

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Tom Hawkins

Vice President, Advisory Services

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Tom has more than thirty years of experience as an educator. He began his career in the U.S. public school system and has held several international school leadership positions throughout Europe and Asia. Most recently, Tom served as Director of the American School of Doha (Qatar). Tom also served as Head of School at the International School of Beijing (China) and St. John’s International School (Belgium); and held administrative positions in Turkey, Norway and the U.S. among his leadership assignments. Tom received both his Doctor of Education degree in Educational Leadership and his Master of Arts in Educational Policy and Administration from the University of Minnesota. He holds a Bachelor of Arts in English, with a minor in Speech Communications from St. Thomas University. During his career, Tom has held board membership positions in several organizations, including AISH, ECIS, and EARCOS. He is also an active member of NESA. International education has been a big part of Tom’s family experience. His wife, Marcia Carlson, is a high school English and journalism teacher who has worked alongside him in international schools. Their four children are all graduates of international schools.

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Deirdre Simon

Chief Financial and Operations Officer

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Deirdre Simon manages the global finance and operations of ISS. In her role she oversees the finance strategy, planning and reporting. She also oversees the non profit 501c3 program and procurement program, which serve to support the international schools in their operations and fundraising. After graduating from Rutgers University, Deirdre started working in the communications, accounting and finance sectors, which brought her to ISS, 29 years ago. This current role finds Deirdre bringing together her love of finance and accounting with client engagement and process management. Deirdre is deeply grateful to her husband and her two grown children, for their support and for making her laugh every single day. She also is proud of her team and respects the hard work they perform daily, to support their client’s schools and educational programs.

Keith Cincotta

Vice President, Digital Products

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As Vice President of Digital Products, Keith leads the strategy and development of ISS digital products and services, with a focus on creating practical, scalable solutions for international schools and educators. His work spans global recruitment, professional development, and digital commerce, bringing together technology, customer experience, and operational strategy to strengthen how ISS serves its global community.

During his time with ISS, Keith has held leadership roles across several areas of the organization, including School Supply and School Services, and has worked directly with international schools on operations, student services, school start-up, and consulting projects. This range of experience gives him a practical perspective on how technology and digital tools can simplify work, improve engagement, and help schools make better use of the services available to them.

Before joining ISS, Keith spent 15 years as a high school principal and secondary school counselor and college advisor in the United States and internationally. He is a graduate of Bloomsburg University of Pennsylvania and holds advanced degrees in Counseling and Educational Leadership from Lehigh University.

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Sharon Lawler-Sudell

Chief Marketing Officer & VP, Strategy

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Sharon brings more than 25 years of experience in brand building and direct marketing leadership to her role as Chief Marketing Officer. Prior to joining ISS, Sharon held a senior leadership position at a home products company and led global multi-channel marketing and communication efforts in the higher education sector at Educational Testing Service, which supported the academic pursuits of 800,000 prospective graduate students around the world each year. She has also held key marketing roles at premier marketing-driven organizations in publishing, consumer goods and membership subscriptions. She holds her M.B.A. in Marketing from Fox School of Business, Temple University and a B.A. in Communication/Marketing from La Salle University. Sharon enjoys spending time with her husband and two children and actively participates in volunteer work in hospitals and educational programs with certified therapy dogs.

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Greg Smith

Vice President, Capital Projects / Head of School SIS

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Greg Smith is the Head of School at the ISS flagship, Shekou International School, and Vice President for capital projects globally. Greg is originally from Western Australia where he was a teacher, a principal, a curriculum advisor and superintendent before holding senior roles in schools in Beijing and Vientiane and Shenzhen from 2018. Greg holds an Advanced Diploma of Management and Masters in Educational Administration from Edith Cowan University. His two children have graduated from international schools and his wife is an international educator, so his family’s commitment and connection to education is strong. He is particularly interested in building networks between schools and communities where learning is relevant to prepare students for the world they will inherit.

Liz Duffy

President

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Liz Duffy became President of ISS in July 2015. Previously, she had served for 12 years as Head Master of The Lawrenceville School, a boarding school in New Jersey with 815 Grade 9-12 students, from 42 states and 39 countries. Before leading Lawrenceville, Liz held senior leadership positions at The Andrew W. Mellon Foundation, The Woodrow Wilson National Fellowship Foundation (WWNFF), and The Ball Foundation. Liz has served on the boards of many foundations and educational institutions, including Princeton University, the National Association of Independent Schools, WWNFF, The Geraldine R. Dodge Foundation, the E.E. Ford Foundation, Princeton AlumniCorps, ArtsEd NJ, and Cum Laude. She has spoken and written extensively on school leadership and educational trends, and has mentored many new heads and school leaders. Liz graduated from Princeton University magna cum laude with an AB in molecular biology. She went on to earn an MBA and an AM in Education from Stanford University.

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Pauline O’Brien

Chief Growth Officer

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Pauline O’Brien is Chief Growth Officer at International Schools Services (ISS), where she leads commercial growth strategy across the organisation’s Digital and Advisory & Operations Services business units. Working closely with the President and senior leadership team, she brings together market strategy, business development, strategic partnerships and intelligence to drive sustainable growth across ISS.

Central to Pauline’s role is connecting ISS more closely with the international school community it serves. Drawing on 30 years of global experience in recruitment, leadership, client services and strategic advisory work, she brings direct market insight into organisational decision making, identifying emerging needs and opportunities and helping shape how ISS develops its services, partnerships and market presence. Her role provides a commercial thread across the organisation, connecting what ISS hears from schools and leaders worldwide with where and how it invests for future growth.

Pauline joined ISS in 2020 following a career spanning international education and executive recruitment. Before joining ISS, she held a senior role at the Council of International Schools (CIS), where her work focused on strengthening and professionalising international recruitment practices globally. Earlier in her career, she worked in international corporate recruitment, recruiting senior executives and specialist talent across a range of industries, including the pharmaceutical sector.

Throughout her career, Pauline’s remit has been truly global. She has led multicultural teams, developed competency based recruitment strategies and leadership programmes, built strategic partnerships, and advised international school leaders and boards around the world. Her work has taken her into more than 150 international schools worldwide, giving her first hand exposure to a remarkable range of school communities, leadership models and cultural contexts. Combined with thousands of leadership and executive interviews, this experience has given her deep insight into the priorities, challenges and opportunities shaping international education globally.

Pauline is an experienced facilitator, coach and keynote speaker. She has delivered leadership and recruitment training for school leadership teams and boards worldwide and regularly contributes to international conferences and professional learning programmes on leadership, governance, recruitment and organisational development.

A longstanding advocate for ethical, equitable and safer recruitment, Pauline has served on the International Task Force on Child Protection (ITFCP), where she chaired the Recruitment, Regulations and Reporting Committee. Through this work, she has contributed to the development and promotion of safer recruitment practices across the international school sector. She has also contributed to the AISA Child Protection Handbook, authoring a chapter focused on safer recruitment and selection practices.

Advancing women in leadership is another significant focus of Pauline’s work. She chairs the ECIS Women in Education Special Interest Group and is actively involved in initiatives including WomenEd, WISE and the Mary Anne Haas Women’s Symposium+. Her work focuses on increasing visibility, opportunity and pathways for women to progress into senior leadership roles. A regular international speaker and facilitator on women and leadership, Pauline is also a published contributor, with chapters featured in Raise Her Up and 10% Braver.

Pauline has previously served on the boards of Women’s Business Initiative International and ACCESS in the Netherlands and currently serves on the boards of Eblana Learning and Shekou International School.

Originally from Ireland and based in the Netherlands, Pauline has pursued studies in management, business and public relations. Her international career and experience working across cultures have shaped a global perspective and a strong understanding of how relationships, leadership and organisational context influence sustainable growth.

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Rob Zangara

Director of Information Technology

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Rob has been a technologist for over twenty-five years, and has over fifteen years of experience leading teams in higher education and not-for-profit environments. Prior to joining ISS, Rob was a director of information technology at Duke University, focusing on programs and systems for K-12 students. He also served as a director for Thomas Edison State University, leading strategic technology initiatives and special projects. While serving as the head of technology for the New Jersey State Library, he was the founder and director of JerseyConnect, a program that provides technology services to public libraries through a statewide network infrastructure and support team. Rob holds a BA in political science and English from Rutgers University. He lives in Chapel Hill, NC with his wife and two sons.

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