Here are some websites on which organisational constellation workshop details are given:

http://www.movingconstellations.com/
The nowherefoundation is a not-for-profit organisation.  It offers a programme of family and organisational constellations workshops led by one of the UK’s leading practitioners, Judith Hemming.  The above website relates predominantly to organisational constellations.

http://www.constellationswork.co.uk/
Vivian Broughton has brought together several people who work within the constellations world.  This site is a source of information, not only about constellations but also training programmes and associated events.

http://www.constellationsolutions.co.uk/index.htm
Alun Reynolds has developed a website that gives information about constellations as well as workshops for both family and organisational constellations.

http://www.businessconstellations.co.uk/BusinessConstellations.html
John Whittingdon has developed this website to advertise workshops that benefit business issues.  In addition, he has included some background information and useful links.

http://www.tyfrancis.org/engagingwithgrowth.html
Ty Francis's website not only is an interesting source of information, but also tells you about constellations workshops and his other services.