This piece features the Hauptwerk Trompete 8 in the middle section. The first part uses Holzgedeckt 8, Rohrfloete 4 and Spitzquinte 1 1/3 and the conclusion Rohrfloete 8 and Sesquialtera 2x.
There are 70 or 80 of Roman's compositions here in Concert Hall - just search.
Roman kindley sent me three books of his music some years ago so thankyou Roman.
Roman Bissinger was born in 1967 in the city of Bamberg, Germany. He grew up in a very musical environment and took his first piano lessons when he was 10 years old.
Because church music was always of great interest to him, he began to play the organ at 18 years of age and has, since then, performed avocationally at services in various churches.
Today he lives and works amongst other things as a spare time musician (Catholic Church music C-exams) and composer in Munich.
https://www.roman-bissinger.com/english/sheet-music/