Tech lead needs to identify the current gaps, study the architecture, map it to current UAT testing and identify and fix the process gaps.
He should work closely with others from IT and TCS to implement any CRs, and making sure before go live thorough UAT is done.
To mitigate the vehicle level challenges with respect to availability, they have implemented a new tool for regression, its called Tapleu. Our tech lead must also drive this initiative and make sure the regression is getting implemented SKU wise.