I have an experience in designing HVAC systems for many projects in Saudi Arabia, some of which were mega projects, like Aboryash hospitality tower in Jeddah, and many royal buildings, not pharmaceutical, but I am sure I will deliver the project conforming to HVAC codes and industry best practice, in shaa' Allah.
I have designed HVAC work for Faculty of Dentistry, Azhar University, Cairo.
I assume you will provide me with room data sheet for all spaces, showing information like required indoor temperature, fresh air flow rate, total air change rate if required, hood air flow rates if any, equipment heat dissipation...etc.
30 days period is a conservative estimate. Project may be delivered earlier. Actual period can be estimated more accurately when I see the drawings to know the project size.