The phrase "and has since established" is correct and usable in written English.
It can be used to indicate that something was set up or created after a certain point in time and continues to exist or operate.
Example: "The organization was founded in 2010 and has since established a strong presence in the community."
Alternatives: "and has subsequently created" or "and has since formed".
He fought a successful court battle to stop being extradited back to Russia on what he claimed was trumped up fraud charges and has since established himself as a top British industrialist and Tory donor.
Having spent last season on loan at Real Madrid, Hernández moved to Germany for a fee believed to be around £8m and has since established himself in the Bundesliga, scoring 19 goals in all competitions for Roger Schmidt's side.
He retired as the archbishop of Cape Town in 1996 and has since established the Desmond Tutu Peace Center in Cape Town, which he said he would continue to support.
She joined Dundee Contemporary Arts from Tate Liverpool in 1997 as curator and deputy director, working to get the place up and running by 1999, and has since established the innovative five-floor space, comprising galleries, cinema and artists' facilities, as a major venue for contemporary art and film.
Hibbard signed a five-year deal in 2010 and has since established himself as Wales' first-choice hooker.
He returned from a year's loan to French Ligue 1 side Lorient in August and has since established himself in Arsene Wenger's first-team squad.
In 2013, Exeter Chiefs - who were promoted in 2010 and have since established themselves in the Premiership - bought Leeds P"P shares" for £5m.
The South American Monk Parakeets arrived at the site in 1999 and have since established two nests with seven or eight birds each.
Chou and Talalay derived the combination index (CI) and median effect equation (MEE) in 1984, and have since established precedents for analyzing synergism.
