On the plane...
On the island...
S1 - S2 - S3 - MP - S4 - S5 - S6
Mike is a DHARMA Initiative technician who along with Casey and others welcomed Roger Linus and Ben Linus to the Island. ("The Man Behind the Curtain") The insignia he wears appears to indicate that he was attached to the Pearl. This role is a nonspeaking background role, and his name is known only from his wardrobe. It is presumed that he was killed in the Purge.