This presentation describes EnCana's IT co-sourcing strategy, one that is distinct from out-sourcing, including the results to date, and lessons learned. It includes information on how EnCana determines which services to cosource, what is retained in-house, and expectations of the service provider. There is information on what has worked well, and where there is still work to do in various types of cosourced service, including client services, ERP support, infrastructure support, and middleware support and development. Finally, some lessons learned will be presented which are being applied to make future cosourcing projects run more smoothly.