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Rennert International

Rennert International is a privately owned language education and communications company serving a worldwide audience.

Education Administration Programs
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Headquarters
New York, United StatesSource: RevenueBaseRetrieved October 13, 2026
Employee range
11 to 50Source: RevenueBaseRetrieved October 13, 2026
Founded
1973Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
14 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Rennert International do?

Founded in 1973 by Cesar Rennert, Rennert International focuses on language education and communications. Rennert International is based at Berkeley College in Midtown Manhattan, New York.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

What the business offers

Services & capabilities.

Translation and interpretation

The company lists translation and interpretation among its specialties.

Source: LinkedIn company description · Retrieved October 13, 2026

Language instruction

The company lists English and international language instruction, teen language programs, and ESOL teacher training among its specialties.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

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Embeddable award for your website

BADGE PREVIEWRennert International listed #8 on Language proficiency testing companies, September 19, 2026Open the published source list.
Rennert International

#8 Language proficiency testing companies

Snapshot: September 19, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 4, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 18, 2026, September 19, 2026 and September 27, 2026. How the company lists are built.

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