For the mirror universe counterpart, please see S. Sealey (mirror).
S. Sealey was a Starfleet officer in the 23rd century.
Sealey was among the members of the Science Ops team listed on the dedication plaque of the USS Discovery. (DIS: "Context Is for Kings", dedication plaque)
This character was only mentioned in writing.
This officer was named after camera operator Sean Sealey.