Insights

Industry Expertise Sullivan's deep focus on financial services, higher education, technology, and professional services creates cross-sell opportunities with large organizations seeking brand strategies that navigate complex ecosystems and critical decision points.

Diversity Advantage As a woman-owned and WBENC-certified agency, Sullivan is well-positioned to meet supplier diversity goals of large enterprises, making it a compelling partner for brands prioritizing ESG and inclusive procurement.

Tech Driven Marketing A modern tech stack including Alteryx, InVision, REST, Office 365, LinkedIn, HSTS, and ZURB Foundation enables data-informed campaigns, prototyping, and seamless integration with client systems, opening opportunities for marketing modernization and co-innovation.

Scale and Stability With revenue in the $500M-$1B range and a 201-500 employee base, Sullivan demonstrates the capacity to lead multi-year, global branding initiatives for enterprise clients, reducing procurement risk.

Complexity to Clarity Sullivan’s mission to transform hard-to-understand businesses into easy-to-love brands and reach customers at critical decision points aligns with clients needing clear messaging for complex offerings, enabling growth in brand strategy, content, and demand generation.

Sullivan Tech Stack

Sullivan uses 8 technology products and services including Alteryx, REST, InVision, and more. Explore Sullivan's tech stack below.

  • Alteryx
    Advanced Analytics And Data Science
  • REST
    Api Management
  • InVision
    Communication And Collaboration
  • Microsoft
    Miscellaneous
  • Office 365
    Office Suites
  • LinkedIn
    Online Community Software
  • HSTS
    Security
  • ZURB Foundation
    UI Frameworks

Media & News

Sullivan's Email Address Formats

Sullivan uses at least 1 format(s):
Sullivan Email FormatsExamplePercentage
FLast@sullivannyc.comJDoe@sullivannyc.com
98%
LastFir@sullivannyc.comDoeJoh@sullivannyc.com
1%
L.First@sullivannyc.comD.John@sullivannyc.com
1%

Frequently Asked Questions

Where is Sullivan's headquarters located?

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Sullivan's main headquarters is located at 292 Madison Avenue 21st Floor New York, New York 10017 United States. The company has employees across 5 continents, including North AmericaEuropeOceania.

What is Sullivan's phone number?

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You can contact Sullivan's main corporate office by phone at . 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 Sullivan's stock symbol?

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Sullivan is a publicly traded company; the company's stock symbol is OSL.

What is Sullivan's official website and social media links?

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Sullivan's official website is sullivannyc.com and has social profiles on LinkedIn.

What is Sullivan's SIC code NAICS code?

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Sullivan's SIC code is 8742 - Management Consulting Services NAICS code is 541613 - Marketing Consulting Services.

How many employees does Sullivan have currently?

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As of June 2026, Sullivan has approximately 372 employees across 5 continents, including North AmericaEuropeOceania. Key team members include Chief Strategy Officer: N. F.President & Ceo: D. P. S.Head Of Marketing: R. L.. Explore Sullivan's employee directory with LeadIQ.

What industry does Sullivan belong to?

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Sullivan operates in the Advertising Services industry.

What technology does Sullivan use?

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Sullivan's tech stack includes AlteryxRESTInVisionMicrosoftOffice 365LinkedInHSTSZURB Foundation.

What is Sullivan's email format?

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

When was Sullivan founded?

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Sullivan was founded in 1990.

Sullivan

Advertising ServicesNew York, United States201-500 Employees

Sullivan is a brand and marketing firm based in New York City, founded in 1990 by Barbara Apple Sullivan. It specializes in translating complex business models into brands that are easy to understand and relate to, with a focus on guiding customers at moments of decision within intricate ecosystems. The firm brings decades of experience across sectors such as financial services, higher education, technology, and professional services, and is woman-owned with WBENC certification.

In the Advertising Services landscape, Sullivan emphasizes brand work that supports customers at critical decision points rather than broad awareness campaigns. Located in New York City and operating as a mid-sized firm, it pursues engagements that require deep industry insight and tailored branding strategies for organizations navigating complexity.

Section iconCompany Overview

Headquarters
292 Madison Avenue 21st Floor New York, New York 10017 United States
Phone number
SIC Code
8742 - Management Consulting Services
Stock Symbol
OSL
NAICS Code
541613 - Marketing Consulting Services
Founded
1990
Employees
201-500

Section iconMedia & News

Section iconFunding & Financials

  • $500M$1B

    Sullivan's revenue is estimated to be in the range of $500M$1B

Section iconFunding & Financials

  • $500M$1B

    Sullivan's revenue is estimated to be in the range of $500M$1B

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