Securing Energy Infrastructure Act This bill establishes a two-year pilot program within the Department of Energy's (DOE's) national laboratories to (1) identify the security vulnerabilities of certain entities in the energy sector, and (2) evaluate technology that can be used to isolate the most critical systems of such entities from cyberattacks. In addition, DOE must establish a working group to evaluate the technology solutions proposed by the national laboratories and to develop a national strategy to isolate the energy grid from attacks.