Administrative Support Specialist with 10+ Years Experience

Mary Claire Costello

Stamford, CT *****

******************@*****.*** • 203-***-****

Detail oriented, administrative professional with 10+ years of experience providing excellent office, customer service, and business support.

Ability to work independently, think and act proactively.

Excellent communication, organizational and interpersonal skills.

Creative, detailed-oriented, multi-tasker.

Experience

Excel Partners, Norwalk, CT 2/2025 – Present

Office Temporary Assistant

Performed daily administrative support (data entry, filing, calls/emails), project assistance.

Reception duties (greeting visitors, managing meeting rooms).

Ensuring smooth operations during busy periods or specific initiatives.

Spire Orthopedic Partners, Stamford, CT 6/2023 – 11/2024

Clerical Support, Revenue Cycle

Support department manager and team.

Performed daily administrative tasks including submission of patient claims, distribution of incoming physical mail, packages and overnight deliveries and incoming faxes.

Data entry of updated claim information

Merritt Staffing, Stamford CT 10/2021 – 6/2023

Temporary Administrative Assistant

Support staff at local public school system.

High School Vice Principal – Performed daily administrative tasks for Vice Principal and team.

Human Resources Department – Supported HR Director and staff with daily reception and telephone duties. Document preparation and general needs to support team.

NBC Universal, New York NY 4/2017 - 5/2019

Administrative Assistant to Ad Sales Solutions Team

Managed EVP’s calendar, served as effective gatekeeper, resolved emerging problems, and

anticipated schedule updates/changes.

Responded to and prioritized meeting requests.

Prepared and supported executive for all meetings, internal and external.

Arranged travel for domestic and international trips.

Managed business expenses.

Collaborated and assisted SVP’s and direct reports readily, optimizing productivity.

Comcast Corporation, Philadelphia PA 1/2015 – 3/2016

Administrative Assistant to SVP, Strategic & Financial Planning

Managed SVP’s complex and frequently changing calendar, serving as effective gatekeeper.

Prepared, coordinated, and proofed briefing materials and decks for all executive-level meetings.

Coordinated and scheduled meetings as well as extensive domestic and international travel.

Reconciled, prepared, and submitted business expense reports.

Served as liaison and maintained open lines of communication with direct reports and administrative staff.

Provided additional administrative support to Executive Directors and their direct reports with various projects, as needed.

Time Warner Cable, New York NY 1/2005 - 1/2015

Administrative Assistant to SVP, Corporate Strategy

Managed calendar and performed all secretarial functions for SVP, Corporate Strategy.

Scheduled meetings, extensive domestic and international travel.

Composed travel itineraries, prepare meeting materials.

Monitored daily calendar and anticipated schedule updates and changes.

Managed travel and other business-related expenses for reimbursement consistent with company policies.

Created, implemented and maintained comprehensive contact database.

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