Kuya Doug Marcaida is a Filipino martial Arts practitioner with close to 20 years experience studying in several systems but specializes in Pekiti Tirsia Kali and holds a "Mandala" Rank under GrandTuhon Leo Gae Jr. and also Studied under Tom Bisio in Pekiti Tirsia Kali and San Miguel Eskrima . He is also one of the Senior practitioners in Kali de Leon under MasterGuro Jun de Leon.

He is the chief Instructor for Edge Impact Weapon tactics with Strategic Edge Impact Global Enterprises S.E.I.G.E ,Inc He has experience in teaching US and Philippine Force Recon Marines and Specialized Law Enforcement units. He is also a Defensive Tactics Instructor for Law Enforcement Edge Impact weapons programs.