Jobs · Administrative · New York

Administrative Assistant

Sisters of Mercy of the Americas · Buffalo, NY · 2 mo ago
On-siteAdministrative$21–$27/hrFull-time

Job Summary

Welcome to Mercy, where the mission meets you. The Sisters of Mercy of the Americas are sustained and inspired by a relationship with God and one another, responding with vision and compassion to the needs of people who are poor, sick, and uneducated. Rooted in a deep commitment to social justice, mercy, and service, our mission shapes every aspect of our work—including how we engage with donors, partners, and communities. Employees of the Sisters of Mercy extend this mission daily by supporting ministries that advance dignity, equity, and care for those most in need.

About the Role

The Mission Advancement Administrative Assistant plays a key role in supporting the Office of Mission Advancement. This position helps strengthen relationships between the Sisters of Mercy, donors, and professional partners through high-quality administrative support, communication, and coordination. This role requires a highly organized, self-motivated individual who can manage multiple priorities, maintain strict attention to detail, and work independently while supporting a mission-driven team.

Responsibilities

  • Support donor engagement, financial processing, and office operations, including:
    • Preparing and sending donor acknowledgments, cards, and communications in a timely manner
    • Coordinating volunteer support for donor outreach and thank-you efforts
    • Supporting donor giving circles, including scheduling, records, minutes, and mailings
    • Aiding with donor estate files and gift processing follow-up
    • Contributing to donor communications, appeals, and mission advancement materials
  • Financial & Administrative Support:
    • Processing deposits and donor contributions using scanning systems and financial tools
    • Entering and monitoring invoices and generating check requests
    • Aiding with reconciliation of donations and financial records
    • Aiding with monthly reporting and annual audit preparation
  • Office Operations:
    • Serving as the first point of contact for the Mission Advancement office
    • Maintaining incoming/outgoing mail, supplies, and office equipment needs
    • Preparing correspondence, reports, and internal communications
    • Maintaining organized records and documentation
    • Aiding with general office workflow and administrative needs

Qualifications

  • Minimum of 2 years administrative assistant experience (or equivalent education/experience)
  • Strong proficiency in Microsoft Office 365, including Teams, SharePoint, and mail merge
  • Excellent attention to detail, grammar, spelling, and written communication skills
  • Ability to manage multiple priorities, meet deadlines, and work independently
  • Strong interpersonal skills and professional judgment
  • Commitment to maintaining donor confidentiality

Preferred Qualifications

  • Experience in a religious organization or nonprofit advancement environment
  • Commissioned Notary Public
  • Familiarity with donor systems, fundraising, or financial reconciliation processes
  • Understanding of advancement principles and data integrity
  • Alignment with the mission and values of the Sisters of Mercy

What Makes This Role Unique

This is more than an administrative position—it is an opportunity to directly support mission advancement work that sustains ministries serving people in need. Every task contributes to strengthening relationships, supporting generosity, and advancing the works of mercy. If you are detail-oriented, reliable, and motivated by meaningful work, we invite you to apply.

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