"founded since" is correct and can be used in written English.
You can use it to refer to something that was established or originated in the past and has continued to exist up to the present. For example: "The university has been founded since 1845 and is now one of the oldest in the country."
Allegations of cheating have dogged Ms. Rhee — now a lightning rod in education circles for her advocacy through StudentsFirst, a nonprofit group she founded — since an investigation by USA Today found high rates of erasures on standardized tests at a Washington elementary school.
Mr. Kirsch, along with Brent Goldfarb, a colleague at Maryland, and David Miller of the University of California, San Diego, have found that 48percentt of dot-com companies founded since 1996 were still around in late 2004, more than four years after the Nasdaq's peak in March 2000.
In California 39 of the state's 100 biggest companies were founded since 1970.
The insecurity is well founded, since this is how many people view him.
To qualify for membership, companies must fall into one of two categories: founded since 2006 and employing at least two people, or founded since 2001 and employing at least six people.
No one is sure when the workshops were founded, since cloisonné artists almost never signed and dated their works.
Only seven of the 13 teams could be properly called "expansion teams," that is, teams founded since 1990.
More than 800 startups with UC patents have been founded since 1980.
Fifty percent of the world's private contemporary art museums were founded between 2001 and 2010, and another 18% have been founded since 2010 (Sutton, 2016).
Fifty-eight respondents have been founded since 1990, including 22 private schools.
Mr Fortuyn was assassinated, and the political party he founded has since all but collapsed.
