ICC Roles
It must be pointed out that, the need and size of ICC group will vary with respect to the size of the company.
For big companies, a full size ICC group is almost a must, whereas for smaller companies, the group can be sized down to one person.
That said, in smaller companies, where ICC is ran as a "one man band", there will certainly be benefits in subcontracting critical expertise to fill some of the crucial roles in the ICC group.
The most critical roles are ICC Manager, Functional Designer, Integration Architect and Business Information Specialist.
The ICC Manager has overall responsibility for planning and leading daily ICC work, whereas the Functional Designer acts as a link between the "business need" and the technical solution. He or she should analyze the "business need" and find the artifacts required by Technical Designer.
The Business Information Specialist - is a representative of Business Unit or Project. He or she is responsible of identifying the need for integration and initializing the defining of requirement for ICC.
Other important roles - especially for big organizations - are ICC Director, Integration Architect, Security Architect, Technical Designer, Service Manager and Test Manager.