Hi Upkar: if the user has access to the top level workflow the administrative panel has the right-click > Corporate Certification Management > Certify and Lock Descendants option. Obviously, if the user cannot access the top level this won't work.
If that's the case you'll probably need to build it yourself into a dashboard. You'll need to loop the profiles and set the certification. Check out the functions:
BRApi.Workflow.General.GetWorkflowUnitClusterPk
BRApi.DataQuality.Process.ExecuteProfileCertification
As they will be the primary pieces you'll need.
Lastly, if memory serves me correctly some of the Actor Workspace dashboards from the Golfstream demo app might provide ideas for views you could use to manage this.