(As far as I can tell, every single person in the city of Arusha has a relative or friend who
is a kili guide. Make sure you have a bona fide recommendation.)
There also seem to be a fairly unlimited number of travel companies offering climbs.
Many of these are very reputable companies,
although I have no direct basis for recommending any of them.
In general they use local guides and porters.
Here is a sample:
Students for International Change (SIC)
Modified: June 12, 2015
Created: March 27, 2003
contact: siegelr@stanford.edu
All pictures are protected by copyright. Do not use without permission.