Our Departments
- Administration - St. Mary's Campus
- 516.921.0808
- Angel Guardian Campus -FBH
- 718.232.1500 x 353
- Human Resources
- 516.921.0808 x 205
- Preventive Services
- 718.375.7444 x 207
- Residential Programs - Syosset
- 516.921.0808 x 813
- Resource Development
- 516.921.0808 x 114
- Volunteer/Mentoring
- 516.921.0808 x 536
Contact information
MercyFirst
Administrative Offices
525 Convent Road
Syosset, NY 11791
Telephone: 516.921.0808