Insights

Academic partnerships Rennert International has a long history in language instruction and ESOL/teacher training, presenting strong potential for partnerships with colleges and universities for student language programs, translation/interpretation services, and faculty development.

Awards and recognition Recent awards and junior fellow recognitions from Columbia College, Lander University, and Rochester Institute of Technology can be leveraged in outreach to prospective institutional clients seeking reputable language education partners and scholarship collaboration.

Expansion and integration Former ownership changes via acquisition by Berkeley Language Institute signal opportunities to engage in cross-sell with broader language services, including integration of online/offline programs, translation, and interpretation offerings for corporate and academic clients.

Tech-enabled delivery A tech stack featuring WordPress, analytics, and standard web technologies indicates readiness for scalable online courses, translation platforms, and digital marketing collaborations with client institutions seeking modern language programs.

Midtown NYC presence Based in Manhattan with a sizable employee footprint, Rennert can target nearby universities, study abroad offices, and corporate training buyers for on-site and blended language programs, expanding opportunities in the New York metro market.

Similar companies to Rennert International

Rennert International Tech Stack

Rennert International uses 8 technology products and services including Crazy Egg, iCIMS, html5media, and more. Explore Rennert International's tech stack below.

  • Analytics
  • Applicant Tracking Systems
  • html5media
    Audio, Video, Graphics
  • Content Delivery Network
  • Content Management System
  • jQuery
    Javascript Libraries
  • Web Analytics
  • Microsoft IIS
    Web Servers

Rennert International's Email Address Formats

Rennert International uses at least 4 email formats:
Rennert International Email FormatsExamplePercentage
FLast@rennert.comJDoe@rennert.com
90%
FirstLast@rennert.comJohnDoe@rennert.com
6%
LastF@rennert.comDoeJ@rennert.com
2%
FirstMLast@rennert.comJohnMDoe@rennert.com
2%

Frequently Asked Questions

What is Rennert International's phone number?

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You can contact Rennert International'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 Rennert International's official website and social media links?

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Rennert International's official website is rennert.com and has social profiles on LinkedIn.

How much revenue does Rennert International generate?

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As of October 2026, Rennert International's annual revenue is estimated to be $25M - $50M.

What is Rennert International's NAICS code?

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Rennert International's NAICS code is 92311 - Administration of Education Programs.

How many employees does Rennert International have currently?

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As of October 2026, Rennert International has approximately 75 employees across 3 continents, including North America, Europe and South America. Key team members include Director Of Studies: L. D., Director Of International Special Programs: L. K. and Director: M. R. Explore Rennert International's employee directory with LeadIQ.

What industry does Rennert International belong to?

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Rennert International operates in the Education Administration Programs industry.

What technology does Rennert International use?

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Rennert International's tech stack includes Crazy Egg, iCIMS, html5media, Sucuri, WordPress, jQuery, Piwik PRO Core and Microsoft IIS.

What is Rennert International's email format?

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Rennert International's email format typically follows the pattern of FLast@rennert.com. Find more Rennert International email formats with LeadIQ.

When was Rennert International founded?

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Rennert International was founded in 1973.
Rennert International logo

Rennert International

Education Administration ProgramsNew York, United States51-200 Employees

Rennert International is a privately held firm focused on language education and communications, founded in 1973 by Cesar Rennert and based in New York. The company provides translation and interpretation services, English and other language instruction, teen language programs, and ESOL teacher training. It serves a global client base, helping individuals and organizations manage language learning and cross-cultural communication needs. Positioned within the education administration programs field, it is a founding member of the International Association of Language Centres, reflecting commitments to quality and ethics.

The firm operates from Berkeley College in Midtown Manhattan, placing it in the heart of New York City. In 2024, Rennert International received multiple academic recognitions, including awards from Columbia College and Rochester Institute of Technology, and recognition as a Lander University Junior Fellow.

Section iconCompany Overview

Phone number
NAICS Code
92311 - Administration of Education Programs
Founded
1973
Employees
51-200

Section iconFunding & Financials

  • $25M - $50M

    Rennert International's revenue is estimated to be in the range of $25M - $50M

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