I've pulled down a solution from Team Foundation Server developed by team member.
I am missing references for:
Microsoft.SQLServer.ManagedDTS
Microsoft.SqlServer.Management.IntegrationServices
I have SSIS on my machine along with Reporting Services.
If I go to Visual Studios >> top 'Tools' menu >> Get Tools and Features
Looks like I already have SQL Server Data Tools installed:

This is all I have in GAC_MSIL:


