Chief Executive Officer

Mark Cox

As Big Brothers Big Sisters of Long Island’s Chief Executive Officer, Mark Cox guides the agency’s vision and mission, leading nearly 100 employees including BBBSLI’s Mentoring Agency and the BBBSLI Donation Center. For over a decade, Mr. Cox has been an instrumental part of the agency’s leadership, first as Chief Development Officer followed by his current position of CEO.

Since becoming CEO in 2013, the agency has experienced consistent growth in staff size as well as the number of children served by BBBSLI’s mentoring programs. This growth has been achieved by increasing the number of Community Based matches as well as expanding the agency’s Site Based programs. Under his leadership, the agency currently has five High School Bigs Programs, three College Based Programs and two Workplace Programs.

He has also implemented strategies responsible for a 300% increase in the Donation Center’s net profits, of which 100% of the net proceeds go directly towards supporting the mentoring program.

As CEO, Mr. Cox has developed the agency’s Board of Directors by working closely with its members on the vision for the agency’s future growth and success. This has included the formation of a diversity committee, the development of a detailed strategic plan as well as the implementation of investment strategies to grow the agency’s funds.

Mr. Cox is also actively involved with Big Brothers Big Sisters of America (BBBSA), serving in his second year as a member of the National Leadership Committee. He also serves as co-chair of BBBSA’s Partnership Development Committee.

Prior to Big Brothers Big Sisters of Long Island, Mr. Cox worked as the Associate Director of Athletics for External Affairs at Hofstra University. He graduated from Hofstra University with a BBA in Marketing in 1992 and earned a Master of Science and Education with distinction in 2001. Mr. Cox also played four years of football and lacrosse and was recipient of the 1991 Iron Mike Award which is presented to the best collegiate football player on Long Island.

Mr. Cox is a member of Molloy College’s Energeia Partnership Leadership Academy, Class of 2019, which is dedicated to identifying and addressing the serious, complex and multi-dimensional issues challenging the Long Island region. His additional memberships include the Edward Smith Mineola Lion’s Club and the Executive Business Association. He resides in Westbury with his wife, Teri, and has two children Kirstin and Tyler.

Mark Cox

Leadership Team

Director of Development, Individual & Foundation Giving

Gina Contaldi

(516) 731-7880 Ext. 221

Chief Financial Officer

Helen Liriano

(631) 273-1469 Ext. 224

Director of Development, Corporate & Event Giving

Meredith McCaslin

(516) 731-7880 Ext. 232

Director of Programs

Fabiola Turner

(516) 731-7880 Ext. 218

Director of Human Resources

Carmelina Vassallo

(631) 273-1469 Ext. 207


Senior Manager of Marketing & Public Relations

Amy Sledz-Sarin

(516) 731-7880 Ext. 222

Senior Manager of Quality Assurance

Josephine Todisco

(516) 731-7880 Ext. 220

External Program Relations Manager

Messiah Gaymon

(631) 273-1469 Ext. 201

Grants Manager

Heather Hanson

(516) 731-7880 Ext. 227

Special Events Manager

Chrissy Mahoney

(516) 731-7880 Ext. 214

Program Manager

Lauren Laurore

(516) 731-7880

Program Manager

Kelly McGowan

(516) 731-7880 Ext. 205


Senior Match Support Specialist

Amanda Jackman

(631) 273-1469 Ext. 216

Match Support Specialist

Alyssa Bloom

(631) 273-1469 Ext. 203

Match Support Specialist

Kerry Duperval

(516) 731-7880  Ext. 231

Match Support Specialist

Maria Jaramillo

(516) 731-7880 Ext. 229

Match Support Specialist

Ashley Murphy

(631) 273-1469 Ext. 236

Senior Enrollment Specialist

Gabriella Ramirez

(516) 731-7880 Ext. 234

Enrollment Specialist

Rosemery Cardenas

(516) 731-7880 Ext. 233

Enrollment Specialist

Amanda Clyburn

(516) 731-7880 Ext. 215

Enrollment Specialist

Jasmine Collazo

(631) 273-1469 Ext. 202

Enrollment Specialist

Jasmine Collazo

(631) 273-1469 Ext. 202

Enrollment Customer Relations Specialist

Shoana Juin

(516) 731-7880 Ext. 211

Recruitment Specialist

Michael Oliveri

(516) 731-7880 Ext. 228

Program Assistant

Anjelica Battiste

(631) 273-1469  Ext. 235

Big Brothers Big Sisters of Long Island