Insights

Reputation & Recognition Rennert International has consistently received industry awards and recognitions, including the Rochester Institute of Technology Science and Math Award and the Columbia College Certificate of Award, indicating a strong reputation for academic excellence and quality standards that can be leveraged to establish credibility with potential institutional clients.

Global Education Focus As a founding member of the International Association of Language Centres and a provider of international language instruction and teacher training, Rennert offers opportunities to collaborate with educational institutions seeking high-quality language programs and professional development services.

Diverse Service Portfolio Offering translation, interpretation, ESOL teaching, and teen language programs positions Rennert as a comprehensive language solutions provider, creating multiple cross-selling opportunities with organizations requiring integrated language and communication services.

Established Market Presence With revenues estimated between $25M and $50M and a base of 51-200 employees, Rennert has a solid presence in the educational administration space, making it a suitable partner for corporations or educational entities looking to enhance their language training and cultural exchange programs.

Similar companies to Rennert International

Rennert International Tech Stack

Rennert International uses 8 technology products and services including Crazy Egg, Google Hosted Libraries, parallax.js, and more. Explore Rennert International's tech stack below.

Crazy Egg
Analytics
Google Hosted Libraries
Content Delivery Network
parallax.js
Javascript Libraries
Choices
Javascript Libraries
Microsoft ASP.NET
Web Frameworks
Plesk
Web Hosting
Nginx
Web Servers
Microsoft IIS
Web Servers

Media & News

Rennert International's Email Address Formats

Rennert International uses at least 1 format(s):

Rennert International Email Formats	Example	Percentage
FLast@rennert.com	JDoe@rennert.com	90%
FirstLast@rennert.com	JohnDoe@rennert.com	6%
LastF@rennert.com	DoeJ@rennert.com	2%
FirstMLast@rennert.com	JohnMDoe@rennert.com	2%

Frequently Asked Questions

Where is Rennert International's headquarters located?

Rennert International's main headquarters is located at 12 E 41st St, 5th Floor New York, NYC 10017, US. The company has employees across 3 continents, including North AmericaEuropeSouth America.

What is Rennert International's phone number?

You can contact Rennert International's main corporate office by phone at

+1-212-867-****

. 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?

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

How much revenue does Rennert International generate?

As of October 2025, Rennert International's annual revenue is estimated to be $3M.

What is Rennert International's SIC code NAICS code?

Rennert International's SIC code is 8299 - Schools and Educational Services, Not Elsewhere Classified NAICS code is 92311 - Administration of Education Programs.

How many employees does Rennert International have currently?

As of October 2025, Rennert International has approximately 72 employees across 3 continents, including North AmericaEuropeSouth America. Key team members include Vice President Of Sales And Business Development: D. H.President: C. R.Executive Assistant To The President: G. H.. Explore Rennert International's employee directory with LeadIQ.

What industry does Rennert International belong to?

Rennert International operates in the Education Administration Programs industry.

What technology does Rennert International use?

Rennert International's tech stack includes Crazy EggGoogle Hosted Librariesparallax.jsChoicesMicrosoft ASP.NETPleskNginxMicrosoft IIS.

What is Rennert International's email format?

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?

Rennert International was founded in 1973.

Rennert International

Education Administration ProgramsUnited States51-200 Employees

Founded in 1973 by Cesar Rennert, Rennert International is a privately-owned language education and communications company that serves the world.

Our specialties include translation and interpretation services, English and international language instruction, Teen language programs, and ESOL teaching training.

Based in New York, Rennert International is based in Berkeley College, Midtown Manhattan, the heart of NYC

Rennert is a founding member of the International of Language Centres (IALC), an association of language schools that administers strict quality and ethical controls. We have been shortlisted for Study Travel Magazine's Star Awards, North American English school category, for six years.