Sean Maher
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Sean Maher Email & Phone Number

Vice President at O2 Sponsor Finance at Old Second National Bank
Location: Chicago, Illinois, United States 6 work roles 2 schools
2 work emails found @mtb.com 1 phone found area 585 LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 100%

Contact Signals · 2 work emails · 1 phone

Work email s****@mtb.com
Direct phone (585) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Old Second National Bank
Role
Vice President at O2 Sponsor Finance
Location
Chicago, Illinois, United States
Company size
443 employees

Who is Sean Maher? Overview

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Quick answer

Sean Maher is listed as Vice President at O2 Sponsor Finance at Old Second National Bank, a with 443 employees, based in Chicago, Illinois, United States. AeroLeads shows a work email signal at mtb.com, phone signal with area code 585, and a matched LinkedIn profile for Sean Maher.

Sean Maher previously worked as Vice President, Underwriting - O2 Sponsor Finance at Old Second National Bank and Vice President, Commercial Senior Credit Underwriter (Middle Market) at M&T Bank. Sean Maher holds Bachelor Of Science In Business Administration (Bsba), Accounting & Economics from The Ohio State University Fisher College Of Business.

Company email context

Email format at Old Second National Bank

This section adds company-level context without repeating Sean Maher's masked contact details.

{first_initial}{last}@mtb.com
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AeroLeads found 2 current-domain work email signals for Sean Maher. Compare company email patterns before reaching out.

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Profile bio

About Sean Maher

Sean Maher is a Vice President at O2 Sponsor Finance at Old Second National Bank. He possess expertise in microsoft office, financial reporting, financial analysis, due diligence, internal audit and 3 more skills.

Listed skills include Microsoft Office, Financial Reporting, Financial Analysis, Due Diligence, and 4 others.

Current workplace

Sean Maher's current company

Company context helps verify the profile and gives searchers a useful next step.

Old Second National Bank
Old Second National Bank
Vice President at O2 Sponsor Finance
aurora, illinois, united states
Website
oldsecond.com
Employees
443
AeroLeads page
Company profile
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6 roles

Sean Maher work experience

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

Vice President, Underwriting - O2 Sponsor Finance

Current
Old Second National Bank

Chicago, Illinois, United States

O2 Sponsor Finance operates as a division of Old Second National Bank (NASDAQ: "OSBC"). O2 Sponsor Finance provides leveraged senior secured cash flow loans to lower middle market manufacturing, distribution and service companies on a national basis. Clients will typically have revenue of $10 million to $100 million and EBITDA of $2 million to $10 million. We primarily work with funded private equity sponsors but also work with mezzanine funds, independent sponsors and family offices.

Mar 2024 - Present

Vice President, Commercial Senior Credit Underwriter (Middle Market)

M&T Bank

Buffalo, New York, United States

Oct 2022 - Mar 2024

Assistant Vice President, Commercial Credit Analyst (Middle Market)

M&T Bank

Buffalo, New York, United States

Jan 2020 - Oct 2022

Banking Officer, Financial Analyst (Corporate Reporting)

M&T Bank

Buffalo, New York, United States

Oct 2017 - Jan 2020

Associate Ii

The Bonadio Group

Buffalo, New York, United States

The Bonadio Group (TBG) is a nationally ranked Top 50 CPA firm offering accounting, tax, and consulting services to clients of all sizes and industries.

Jan 2017 - Oct 2017
Team & coworkers

Colleagues at Old Second National Bank

Other employees you can reach at oldsecond.com. View company contacts for 443 employees →

BJ Brad Johnson, Cfa, Cfp® Brad Johnson, Cfa, Cfp® Colleague at Old Second National BankNaperville, Illinois, United States View → PA Pam Abrego Pam Abrego Colleague at Old Second National BankAurora, Illinois, United States View → KW Kellie Willig Kellie Willig Colleague at Old Second National BankNew Lenox, Illinois, United States View → DK Debria Kitchell Debria Kitchell Colleague at Old Second National BankGarden Prairie, Illinois, United States View → CA Carlos A. Carlos A. Colleague at Old Second National BankGreater Chicago Area, United States View → LT Liz Thompson Liz Thompson Colleague at Old Second National BankGreater Chicago Area, United States View → CA Carl Anfenson Carl Anfenson Colleague at Old Second National BankArlington Heights, Illinois, United States View → HS Hannah Smart Hannah Smart Colleague at Old Second National BankGreater Chicago Area, United States View → CM Carina Menchaca Carina Menchaca Colleague at Old Second National BankAurora, Illinois, United States View → DT Dee Taggett Dee Taggett Colleague at Old Second National BankGreater Chicago Area, United States View →
2 education records

Sean Maher education

FAQ

Frequently asked questions about Sean Maher

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

What company does Sean Maher work for?

Sean Maher works for Old Second National Bank.

What is Sean Maher's role at Old Second National Bank?

Sean Maher is listed as Vice President at O2 Sponsor Finance at Old Second National Bank.

What is Sean Maher's email address?

AeroLeads has found 2 work email signals at @mtb.com for Sean Maher at Old Second National Bank.

What is Sean Maher's phone number?

AeroLeads has found 1 phone signal(s) with area code 585 for Sean Maher at Old Second National Bank.

Where is Sean Maher based?

Sean Maher is based in Chicago, Illinois, United States while working with Old Second National Bank.

What companies has Sean Maher worked for?

Sean Maher has worked for Old Second National Bank, M&T Bank, and The Bonadio Group.

Who are Sean Maher's colleagues at Old Second National Bank?

Sean Maher's colleagues at Old Second National Bank include Brad Johnson, Cfa, Cfp®, Pam Abrego, Kellie Willig, Debria Kitchell, and Carlos A..

How can I contact Sean Maher?

You can use AeroLeads to view verified contact signals for Sean Maher at Old Second National Bank, including work email, phone, and LinkedIn data when available.

What schools did Sean Maher attend?

Sean Maher holds Bachelor Of Science In Business Administration (Bsba), Accounting & Economics from The Ohio State University Fisher College Of Business.

What skills is Sean Maher known for?

Sean Maher is listed with skills including Microsoft Office, Financial Reporting, Financial Analysis, Due Diligence, Internal Audit, Forecasting, Project Planning, and Accounting.

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