Ms Osei was appointed to replace Dr Kwadwo Afari Gyan, who has served in that role since the return to democratic governance in 1993.
He retires at the end of this month after supervising six successive elections.
Mrs Osei, until her appointment by President John Dramani Mahama, was the head of the National Commission for Civic Education (NCCE).
“We hope she will contribute immensely to the development of our democratic dispensation and its growth, by helping to resolve the many challenges she is inheriting from Dr. Kwadwo Afari Gyan, her predecessor,” the country’s largest opposition party said in a statement issued by its National Chairman Paul Awentami Afoko.
“We recognize that this is another feat for women in this country and pray she lives up to the high expectation of all Ghanaians,” the statement dated Friday, June 26 concluded.
By Emmanuel Kwame Amoh|3news.com|Ghana