From 1924 he was assisted by Frederick M. Molyneux as assistant bishop.

In 1915 was elected assistant bishop of Eirinoupolis.

On retirement he became an assistant bishop in the Diocese of York.

An additional position as assistant bishop in Uppsala diocese was created in 1990.

He then served as assistant bishop for the Diocese of Newark from 1989 to 1991.

He was elected assistant bishop of New York, with the right of succession, in 1811.

In retirement he was an assistant bishop in the Diocese of Sheffield.

In 1886 he had declined an election as assistant bishop of Pennsylvania.

From 2002 to 2008, Scriven served the Diocese of Pittsburgh as assistant bishop.

He was also assistant bishop of Utrecht.