Lighting system refurbishment, plumbing system refurbishment, rainwater ulilization system installation and purchasing some pieces of Energy Star rated equipment are included within our CI project scope of work. Lighting system has been designed by the interior designer, so one of two required signatories on LEED online form was filled by the interior designer. However, there is still one required signatory by design engineer remained. Although no HVAC system alteration was included in our CI project scope of work, signatory by design engineer is still required? If so, who would be the appropriate person to sign the form? We wonder if the base building's engineer who manages the base building's HVAC operations and maintenance would be the most appropriate person to sign as the design engineer, because he is likely to be the most familiar with the base building's HVAC system within the building. Any comment would be appriciated. Thank you.