Founded in 1979, CES boasts over 40 years of experience in imparting English language education to students worldwide. The institution maintains high standards for its faculty, ensuring that all teachers in England possess, at a minimum, either the Trinity TESOL or Cambridge CELTA qualification. Many educators hold specialized EFL teaching diplomas and degrees as well. Meanwhile, in Ireland, CES teachers hold university degrees along with ACELS recognized teaching qualifications, and numerous instructors boast specialist EFL teaching certifications like DELTA.

In both Ireland and England, CES meticulously selects teachers based on their extensive experience, unwavering enthusiasm, positive attitude, and their ability to make language learning an enjoyable experience for students.

Across all CES schools, students can choose from a range of accommodation options, including homestays, ensuring a comfortable and immersive learning environment. The collective academic knowledge, administrative expertise, and profound experience of CES staff in both the UK and Ireland enable the institution to offer tailored courses and services that cater precisely to individual requirements.

In recognition of its commitment to excellence, CES was awarded the esteemed 'Star English Language School in Europe' in 2007, with four centers or less. Additionally, CES received nominations for the same award consistently from 2008 to 2011, making it the only school to be nominated for five consecutive years. Accredited by the British Council in England and ACELS in Ireland, CES maintains a reputable standing in the industry. Furthermore, CES Ireland is a founding member of Marketing English in Ireland (MEI).

As a testament to its dedication to quality education, several year-round schools within CES proudly hold full EAQUALS membership. CES Dublin serves as an official IELTS Test Centre and a PEARSON test centre, further enhancing its academic offerings. Additionally, CES Leeds and Harrogate serve as official IELTS Test Centres.