Artistic Director of Ludlow Festival Shakespeare (1997, 1998 & 1999, 2006 & 2007).
Directed annual Shakespeare in grounds of Ludlow castle for audiences of 1,000 per night.
Much Ado About Nothing - (1997), Hamlet - (1998), Midsummer Night's Dream - (1999) - Midsummer Night's Dream (2006), 'Comedy of Errors' (2007)

Artistic Director of Everyman Theatre Liverpool (1983-1989).
Created new artistic policy for long-running accessible productions.
Glen wrote a new libretto for the opera Tosca and directed production with eighteen actor-musicians performing and playing Puccini's operatic score.
Shakespeare productions include - The Tempest, Romeo and Juliet, Macbeth, Taming Of The Shrew, Hamlet, Winter's Tale.
Commissioned and directed Shirley Valentine - Willy Russell (world premiere)

Founder and first Artistic Director of Secombe Centre, Sutton, Surrey. (1981-82).
Glen created policy, opened and directed first production for this purpose-built theatre.

Glen was founder and first Artistic Director of London Bubble Theatre (1972-1979).
Created policy and originated first two completely mobile structures designed for touring London's parks and open spaces with a repertoire of accessible classics and musicals. Steered company to independence forming own Board of Governors and constitution.

London theatres include Royal Court, Bush, Tricycle, Greenwich, Hampstead.

UK touring productions include:
Bill Kenwright Ltd. (productions include Lettice and Lovage, Our Day Out, A Christmas Carol, Shirley Valentine).
Cambridge Theatre Company (Can't Pay, Won't Pay),
English Shakespeare Company (Comedy Of Errors 1989 UK tour; 1990 Jerusalem, Kiev and Moscow).
Paul Farrah Productions Ltd. (Funny About Love).

See Glen's biography for details of freelance productions.