LeadIQ logo
Learn more at LeadIQ.com

Insights

Loading spinner
Gathering insights about J.M. O'Brien & Co.…

J.M. O'Brien & Co. Tech Stack

J.M. O'Brien & Co. uses 4 technology products and services including Microsoft Word, GoDaddy, Apache HTTP Server, and more. Explore J.M. O'Brien & Co.'s tech stack below.

  • Microsoft Word
    Office Suites
  • GoDaddy
    Web Hosting
  • Apache HTTP Server
    Web Servers
  • Apache
    Web Servers

Media & News

J.M. O'Brien & Co.'s Email Address Formats

J.M. O'Brien & Co. uses at least 1 format(s):
J.M. O'Brien & Co. Email FormatsExamplePercentage
FLast@jmobrien.comJDoe@jmobrien.com
39%
Last@jmobrien.comDoe@jmobrien.com
11%
FLast@jmobrien.comJDoe@jmobrien.com
39%
Last@jmobrien.comDoe@jmobrien.com
11%

Frequently Asked Questions

Where is J.M. O'Brien & Co.'s headquarters located?

Minus sign iconPlus sign iconJ.M. O'Brien & Co.'s main headquarters is located at 1350 Main Street One Financial Plaza 15th Floor Springfield, Massachusetts 01103 United States. The company has employees across 2 continents, including North AmericaAsia.

What is J.M. O'Brien & Co.'s phone number?

Minus sign iconPlus sign icon You can contact J.M. O'Brien & Co.'s main corporate office by phone at
+1-413-733-****
. For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is J.M. O'Brien & Co.'s official website and social media links?

Minus sign iconPlus sign iconJ.M. O'Brien & Co.'s official website is jmobrien.com and has social profiles on LinkedIn.

How much revenue does J.M. O'Brien & Co. generate?

Minus sign iconPlus sign icon As of February 2026, J.M. O'Brien & Co.'s annual revenue is estimated to be $2.4M.

What is J.M. O'Brien & Co.'s SIC code NAICS code?

Minus sign iconPlus sign iconJ.M. O'Brien & Co.'s SIC code is 8721 - Accounting, Auditing, and Bookkeeping Services NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does J.M. O'Brien & Co. have currently?

Minus sign iconPlus sign iconAs of February 2026, J.M. O'Brien & Co. has approximately 9 employees across 2 continents, including North AmericaAsia. Key team members include President: J. O.Partner: A. M.Director, Trusts & Estates: L. K.. Explore J.M. O'Brien & Co.'s employee directory with LeadIQ.

What industry does J.M. O'Brien & Co. belong to?

Minus sign iconPlus sign iconJ.M. O'Brien & Co. operates in the Accounting industry.

What technology does J.M. O'Brien & Co. use?

Minus sign iconPlus sign iconJ.M. O'Brien & Co.'s tech stack includes Microsoft WordGoDaddyApache HTTP ServerApache.

What is J.M. O'Brien & Co.'s email format?

Minus sign iconPlus sign iconJ.M. O'Brien & Co.'s email format typically follows the pattern of FLast@jmobrien.com. Find more J.M. O'Brien & Co. email formats with LeadIQ.

When was J.M. O'Brien & Co. founded?

Minus sign iconPlus sign iconJ.M. O'Brien & Co. was founded in 1991.

J.M. O'Brien & Co.

AccountingMassachusetts, United States2-10 Employees

J.M. O'Brien & Company, PC was founded in October 1991 by John M. O'Brien. We service approximately 700 clients by providing auditing/accounting and tax services.
 
We provide auditing and accounting services to a wide range of clients in the following industries:
     * Not-for-profit
     * Financial service
     * Distribution 
     * Manufacturing
     * Retail 
     * Service
     * Transportation 

In addition, we provide other nontraditional services such as litigation support, budgeting and forecasting, outsourced internal audit services and specialized transactional consulting.

Section iconCompany Overview

Headquarters
1350 Main Street One Financial Plaza 15th Floor Springfield, Massachusetts 01103 United States
Phone number
+1-413-733-****
Website
jmobrien.com
SIC Code
8721 - Accounting, Auditing, and Bookkeeping Services
NAICS Code
5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded
1991
Employees
2-10

Section iconMedia & News

Section iconFunding & Financials

  • $10M$25M

    J.M. O'Brien & Co.'s revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    J.M. O'Brien & Co.'s revenue is estimated to be in the range of $10M$25M

Company Leadership

  • Stylized image of a person
    J. O.
    President
    Phone icon
    Mobile Phone
  • Stylized image of a person
    A. M.
    Partner
    Phone icon
    Mobile Phone
  • Stylized image of a person
    L. K.
    Director, Trusts & Estates
    Phone icon
    Mobile Phone
  • Stylized image of a person
    L. S.
    Administration
    Phone icon
    Mobile Phone
  • Stylized image of a person
    K. S.
    Tax And Accounting Specialist
    Phone icon
    Mobile Phone

Employee Directory

  • Stylized image of a person
    M. C.
    Audit Specialist
    Phone icon
    Mobile Phone
  • Stylized image of a person
    M. L.
    CPA
    Phone icon
    Mobile Phone

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust LeadIQ to help them build pipeline confidently.

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust
LeadIQ to help them build pipeline confidently.

© LeadIQ, Inc. All rights reserved.