John Costello
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John Costello Email & Phone Number

Development Professional and Community Volunteer at OPERA San Antonio
Location: San Antonio, Texas, United States 11 work roles 2 schools
1 work email found @klrn.org LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 100%

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Current company
Role
Development Professional and Community Volunteer
Location
San Antonio, Texas, United States
Company size

Who is John Costello? Overview

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Quick answer

John Costello is listed as Development Professional and Community Volunteer at OPERA San Antonio, a company with 14 employees, based in San Antonio, Texas, United States. AeroLeads shows a work email signal at klrn.org and a matched LinkedIn profile for John Costello.

John Costello previously worked as Elections Judge at Bexar County Elections Department and Chorister at Opera San Antonio. John Costello holds Juris Doctor, Law from Baylor University School Of Law.

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Email format at OPERA San Antonio

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{first_initial}{last}@klrn.org
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Profile bio

About John Costello

While degrees in engineering and law may not be the traditional path to a non-profit career, my love for non-profit work began at an early age while volunteering with my parents. After practicing law for almost 10 years, a desire for a more rewarding experience led me back to my non-profit roots. For more than 20 years, my development career has covered a wide range of activities from annual fund drives to major gifts to corporate sponsorships, with an emphasis on special events. In the non-profit sector, staffing and resources are minimal, so learning every facet of the position was essential to success. Sharing this experience and skills with others has always been a passion and been a driving force in my volunteerism. Fortunately, San Antonio has many opportunities for my time...Friends of the San Antonio Public Library, Texas Public Radio, University Health PFAC Steering Committee, San Antonio Mastersigners, and more!

Listed skills include Fundraising, Event Planning, Public Relations, Social Media, and 23 others.

Current workplace

John Costello's current company

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OPERA San Antonio
Opera San Antonio
Development Professional and Community Volunteer
san antonio, texas, united states
Website
Employees
14
AeroLeads page
11 roles

John Costello work experience

A career timeline built from the work history available for this profile.

Elections Judge

Current
Bexar County Elections Department

San Antonio, Texas, United States

Trainings with local elections officials, judges supervise local polling places in Bexar County for all manners of elections. Judges are responsible for securing certified staff for the elections, setting up polling sites, and ensuring the staff understands how to operate election equipment so people can vote.

Jan 2018 - Present

King William Fair Director

San Antonio, Texas, United States

The King William Fair is a fun-filled, family festival on the final Saturday of Fiesta. Beginning with a delightfully funky parade, the day-long event offers a variety of art and craft vendors, lively music, dance, and delicious food and beverages...all set in the historic King William neighborhood.

Oct 2021 - May 2023

Owner

Extraordinary Events By Costello

San Antonio, Texas Area

With more than 20 years experience in the non-profit sector, Extraordinary Events by Costello provides full-service event planning, coordination, and implementation. From small elegant dinners to galas for thousands, Extraordinary Events by Costello will guide you through every step for a cohesive orchestrated event. From concept to execution, we work with.

Mar 2018 - Nov 2021

Vice President Of Events

Responsible for the management and execution of fundraising events, including Blazing Gavels Auction, San Antonio Wine Festival, and all volunteer programs.

Oct 2010 - Sep 2016

Director Of Events

Direct fundraising events including televised Auction, San Antonio Wine Festival, and Laredo Women's Health Conference.

Jan 2005 - Sep 2010

Auction Manager

Manage KLRN's largest fundraising event, Blazing Gavels Auction

Sep 2001 - Dec 2004

Innkeeper

A Victorian Lady Inn

Downtown San Antonio's elegant bed and breakfast, located in the historic Tobin Hill neighborhood.

Jul 2007 - Mar 2013

Auction Manager

Rocky Mountain Pbs

Manage televised auction.

Sep 1999 - Jun 2001

Assistant Criminal District Attorney

Hays County Criminal District Attorney'S Office

Prosecuted criminal cases and represented government agencies in civil proceedings.

Jun 1988 - Sep 1995
Team & coworkers

Colleagues at OPERA San Antonio

Other employees you can reach at operasa.org. View company contacts for 14 employees →

2 education records

John Costello education

Bachelor Of Science, Electrical Engineering

Activities and Societies: Tau Beta Pi, Mortar Board, Student Foundation, Circle K, Eta Kappa Nu

FAQ

Frequently asked questions about John Costello

Quick answers generated from the profile data available on this page.

What company does John Costello work for?

John Costello works for OPERA San Antonio.

What is John Costello's role at OPERA San Antonio?

John Costello is listed as Development Professional and Community Volunteer at OPERA San Antonio.

What is John Costello's email address?

AeroLeads has found 1 work email signal at @klrn.org for John Costello at OPERA San Antonio.

Where is John Costello based?

John Costello is based in San Antonio, Texas, United States while working with OPERA San Antonio.

What companies has John Costello worked for?

John Costello has worked for Bexar County Elections Department, Opera San Antonio, King William Association, Extraordinary Events By Costello, and Klrn Public Television.

Who are John Costello's colleagues at OPERA San Antonio?

John Costello's colleagues at OPERA San Antonio include Sarah Jessica Garcia, Jasmine Marcilla, Kara Smoot, Franco Fagioli, and E. Loren Meeker.

How can I contact John Costello?

You can use AeroLeads to view verified contact signals for John Costello at OPERA San Antonio, including work email, phone, and LinkedIn data when available.

What schools did John Costello attend?

John Costello holds Juris Doctor, Law from Baylor University School Of Law.

What skills is John Costello known for?

John Costello is listed with skills including Fundraising, Event Planning, Public Relations, Social Media, Event Management, Management, Nonprofits, and Media Relations.

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