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 and the BBBSLI Donation Center. For the last 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 staff has grown to 20 employees and the number of children served by the mentoring program has increased each year, with over 24% growth in 2016. This growth has been achieved by the expansion of existing site-based programs as well as increasing the number of community-based matches. Under his leadership, the agency has also added four new High School Bigs Programs, three College Based Programs and three 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 development of an elaborate strategic plan as well as the implementation of investment strategies to grow the agency’s funds.

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 Masters 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 an active member of the Edward Smith Mineola Lion’s Club, Executive Business Association and Network Long Island. He resides in Westbury with his wife, Teri, and two children Kirstin and Tyler.

Mark Cox

Leadership Team

Director of Development for Individual 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

Alexa Altolaguirre

(516) 731-7880 Ext. 223

Match Support Specialist

Alyssa Bloom

(631) 273-1469 Ext. 203

Match Support Specialist

Lauren Deptula

(631) 273-1469  Ext. 209

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

Amanda Clyburn

(516) 731-7880 Ext. 215

Enrollment Specialist

Jasmine Collazo

(631) 273-1469 Ext. 202

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