DR. BILL FIORDALIS - HEAD OF SCHOOL
Bill Fiordalis was appointed Head of School and officially began on July 1, 2025. Dr. Fiordalis grew up in Cleveland, Ohio, and upon graduating from high school, attended Rollins College in Winter Park, Florida. After graduating from Rollins, he earned his Master's in Education from Ursuline College in Pepper Pike, Ohio, and served as a classroom teacher for 15 years, teaching 4th and 6th grade. In May 2026, Bill Fiordalis earned his doctorate of Educational Leadership (Ed.D.) from Nova Southeastern University.
Before joining St. Mark’s Episcopal School, Dr. Fiordalis spent twenty years at Lake Highland Preparatory School in Orlando, Florida, where he served in several teaching positions and administrative roles, including Director of Lower School and Associate Head of School.
DR. ALEXANDRA FERNANDEZ - HEAD OF LOWER SCHOOL
Alexandra Fernandez was appointed as Head of Lower School in July 2022. For the past 25 years, Dr. Fernandez has served as a teacher and administrator in PK through Grade 8 schools. Prior to joining St. Mark’s, Dr. Fernandez served as Principal for two schools in the Archdiocese of Miami, where she held various leadership roles as a principal advisory council member, principal mentor, and clinical educator. Additionally, Dr. Fernandez has served on numerous accreditation visits as a team chairperson for the Florida Catholic Conference Accreditation Program. Dr. Fernandez holds a Doctor of Education degree in Leadership from Creighton University, a Master of Science degree in Educational Leadership from Nova Southeastern University, a Bachelor of Science degree in Secondary English Education from Nova Southeastern University, and a Professional Educator's Certificate in Educational Leadership and English Education from the State of Florida. With extensive experience and a deep passion for education and leadership, Dr. Fernandez also serves as a Leadership Coach for FACTS Education Solutions.
MARCO CIRILLO - HEAD OF MIDDLE SCHOOL
Marco Cirillo was appointed Head of Middle School in July 2023. He brings with him over 19 years of UK and international school experience. Holding various teaching and administrative roles throughout his career, Mr. Cirillo has extensive experience in both designing and publishing curricula for leading international organizations, being part of accreditation teams and leading regional professional development programs. Mr. Cirillo holds a Bachelor of Arts degree in Geography and Development Studies from the University of Sussex and a MA in Secondary Education from Middlesex University.
CATHY HOFFNER - HEAD OF PRESCHOOL
Catherine Hoffner was appointed Head of Preschool in June 2024. For the past twenty-four years, Ms. Hoffner has served as a teacher in fifth grade, second grade, PK4 and Christian Education. She has been a member of the St. Mark’s faculty for the past 15 years. Additionally, Ms. Hoffner is a United States Navy veteran, serving 4 years active duty and 17 in the reserves. Ms. Hoffner holds a Bachelor of Arts degree in Elementary Education, DCF Director’s Credential and a Professional Educator’s Certificate from the State of Florida in Elementary Education and Prekindergarten with an ESOL Endorsement. Ms. Hoffner is the proud mom of a former St. Mark’s student, who is entering her junior year at Florida Atlantic University.
CINDY RUBIN - DIRECTOR OF ENROLLMENT
Cindy Rubin was appointed Director of Enrollment in April 2015. Entering her 23rd year in education, Mrs. Rubin has considerable college and independent school experience in recruitment, admission, enrollment, and retention. She holds a master’s and bachelor’s degree in Communication from the University of Arkansas. Additionally, Mrs. Rubin is a Certified Admission and Enrollment Professional (CAEP©), and she has served on several school accreditation teams for the Florida Council of Independent Schools. Prior to joining St. Mark’s Episcopal School, she managed enrollment at Holy Spirit Preparatory School, an independent school in Atlanta, Georgia. Mrs. Rubin is the proud parent of John, a St. Mark's alumni.
SERGIO PEREZ - CHIEF FINANCIAL OFFICER
Sergio Perez was appointed Chief Financial Officer in May of 2024 after 16 years at North Broward Preparatory School, last serving as the Director of Finance. Mr. Perez, a graduate of Florida Atlantic University and Certified Public Accountant, has a 30+ year career in which he held accounting and finance positions in various industries, such as Food Retail, B2B Retail, and Semiconductor, prior to joining North Broward Preparatory School. After a brief stint in an accounting leadership position in the Insurance industry, Mr. Perez returned to his passion which is being part of the education community. Mr. Perez and his wife, Maritza, are the parents of five children: three sons, Luis, Christian and Christopher, and two daughters, Adrianna and Alyssa.
AMYLEIGH ATWATER - DIRECTOR OF DEVELOPMENT
Amyleigh Atwater serves as Director of Development at St. Mark’s Episcopal School, bringing 15 years of experience in nonprofit fundraising, donor engagement, strategic advancement, and event leadership. Known for her energy, creativity, and relationship-centered approach, she is passionate about connecting people with purpose and creating meaningful opportunities for families and supporters to invest in missions that make a lasting impact. A 2009 graduate of Florida Atlantic University, Amyleigh earned a B.A. in Public Communication with a minor in Sociology and served as president of Alpha Xi Delta. She later became a certified wedding and event planner through the New York Institute of Art and Design. A North Palm Beach native, Amyleigh is proud to be raising her two young sons with her husband, Stephen Heiman. Together, they share a strong commitment to faith, service, education, and community.
LORI D'AGOSTINO - DIRECTOR OF HUMAN RESOURCES
Lori D’Agostino was appointed Director of Human Resources in June 2026. For the past 30 years, Mrs. D’Agostino has served in Human Resources leadership roles across the education, publishing, insurance, hospitality, and PEO industries. Prior to joining St. Mark’s, she served as Director of Human Resources for Jonathan’s Landing Golf Club and held HR leadership roles at The Celedinas Insurance Group, Pearson Education and The Benjamin School, managing company-wide HR programs, onboarding initiatives, and providing comprehensive faculty and staff support. Mrs. D’Agostino holds a Master of Science degree in Human Resource Management from the New Jersey Institute of Technology and a Bachelor of Science degree in Business Administration from Ramapo College of New Jersey. With extensive industry experience and a deep commitment to organization leadership, Mrs. D’Agostino is a member of both the National Society for Human Resource Management (SHRM) and its local chapter.