All these years, permanent associate of Panagiotis, is the Sound Engineer Ioannis Mpenetas, who graduated from the faculty of Sound “Papantonopoulou-Panavision” in 1995 after 2 years attendance.

In 1993 till 1995, he worked as Assistant Sound Engineer F.O.H. in the company Audio Control.

In 1996 till 1997, he worked as Sound Engineer P.A. System in the company Audio Sound.

In 1998 till 2009, he worked as Supervisor P.A. System and Sound Designer in the company Audio Sound. He worked as well, in many music festivals and live concerts with various groups as, Alkistis Protopsalti, Dimitra Galani, Giorgo Ntalara, Mikis Theodorakis, Nana Mouskouri, Porcupine Tree, Metallica, Dream Theatre, Black Sabbath, Archive, The Smashing Pumpkins, Roger Waters, Pet Shop Boys, Peter Gabriel, Thievery Corporation, Judas Priest, Tito Puente, and more.

In 2001, he attended the seminar course held by L-Acoustics and acquired the Q.T.V. diploma.

In 2005, he attended the seminar course held by L-Acoustics and acquired the C.V.E. diploma.