Insights

Recent Acquisition Peterson Sullivan LLP was acquired by BDO USA in October 2019, indicating potential integration opportunities or needs for support in merging systems, processes, or expanding service offerings.

Mid-Sized Market Focus With revenue between 25M and 50M and a team of around 200 professionals, Peterson Sullivan serves a niche of mid-sized clients, presenting opportunities to provide tailored advisory or technology solutions to similar firms in the region.

Regional Presence Located in Seattle and serving the Pacific Northwest, there is potential to target local industries and expand regional client relationships, especially with companies seeking reliable accounting and advisory services.

Technology Utilization The firm leverages a modern tech stack including WordPress, PHP, and various UI and SEO tools, suggesting openness to digital transformation projects or technology consulting to enhance operational efficiency.

Competitive Landscape Positioned among large firms like EY and Deloitte, Peterson Sullivan presents opportunities for specialized niche services, such as high-net-worth individual advisory or strategic consulting, to differentiate from bigger competitors.

Similar companies to Peterson Sullivan LLP

Peterson Sullivan LLP Tech Stack

Peterson Sullivan LLP uses 8 technology products and services including WordPress, Font Awesome, Twemoji, and more. Explore Peterson Sullivan LLP's tech stack below.

WordPress
Content Management System
Font Awesome
Font Scripts
Twemoji
Font Scripts
PHP
Programming Languages
Yoast SEO
Search Engines
Kendo UI
UI Frameworks
Adobe Fonts
Web Fonts
Microsoft ASP.NET
Web Frameworks

Media & News

BDO USA, Llp acquires Pscpa.
BDO USA has acquired Peterson Sullivan LLP, a Seattle-based accounting and consulting firm.
Oct 04, 2019 | www.consulting.us

Peterson Sullivan LLP's Email Address Formats

Peterson Sullivan LLP uses at least 1 format(s):

Peterson Sullivan LLP Email Formats	Example	Percentage
FLast@pscpa.com	JDoe@pscpa.com	48%
Last@pscpa.com	Doe@pscpa.com	3%
FirstL@pscpa.com	JohnD@pscpa.com	1%
FLast@pscpa.com	JDoe@pscpa.com	48%

Frequently Asked Questions

Where is Peterson Sullivan LLP's headquarters located?

Peterson Sullivan LLP's main headquarters is located at 601 Union Suite 2300 Seattle, Washington 98101 United States. The company has employees across 1 continents, including North America.

What is Peterson Sullivan LLP's phone number?

You can contact Peterson Sullivan LLP's main corporate office by phone at

+1-206-382-****

. 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 Peterson Sullivan LLP's official website and social media links?

Peterson Sullivan LLP's official website is pscpa.com and has social profiles on LinkedIn.

How much revenue does Peterson Sullivan LLP generate?

As of February 2026, Peterson Sullivan LLP's annual revenue is estimated to be $4M.

What is Peterson Sullivan LLP's SIC code NAICS code?

Peterson Sullivan LLP's SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does Peterson Sullivan LLP have currently?

As of February 2026, Peterson Sullivan LLP has approximately 186 employees across 1 continents, including North America. Key team members include Chief Financial Officer: J. H.Partner At Bdo: R. R.Controller: A. M.. Explore Peterson Sullivan LLP's employee directory with LeadIQ.

What industry does Peterson Sullivan LLP belong to?

Peterson Sullivan LLP operates in the Accounting industry.

What technology does Peterson Sullivan LLP use?

Peterson Sullivan LLP's tech stack includes WordPressFont AwesomeTwemojiPHPYoast SEOKendo UIAdobe FontsMicrosoft ASP.NET.

What is Peterson Sullivan LLP's email format?

Peterson Sullivan LLP's email format typically follows the pattern of FLast@pscpa.com. Find more Peterson Sullivan LLP email formats with LeadIQ.

When was Peterson Sullivan LLP founded?

Peterson Sullivan LLP was founded in 1953.

Peterson Sullivan LLP

Q: What is Peterson Sullivan LLP's official website and social media links?

Peterson Sullivan LLP's official website is pscpa.com. Peterson Sullivan LLP has social profiles on LinkedIn.

Q: How many employees does Peterson Sullivan LLP have currently?

Peterson Sullivan LLP has approximately 186 employees.

Q: What technology does Peterson Sullivan LLP use?

Peterson Sullivan LLP's tech stack includes Adobe Fonts, Font Awesome, jQuery, PHP, AddToAny.

AccountingWashington, United States51-200 Employees

Peterson Sullivan is a leading public accounting and advisory firm based in Seattle. Founded 65 years ago, the firm provides comprehensive accounting, audit, tax, and consulting services to publicly traded companies, closely held businesses, and high-net-worth individuals throughout the Pacific Northwest and internationally. Our close to 200 professionals are committed to technical excellence and exemplary client service. For more information, visit pscpa.com.

Company Overview

Headquarters: 601 Union Suite 2300 Seattle, Washington 98101 United States
Phone number: +1-206-382-****
Website: pscpa.com
SIC Code: 7389 - Business Services, Not Elsewhere Classified
NAICS Code: 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded: 1953
Employees: 51-200