Preben Røgild Knudsen

2009 – 2016

Chairman, SINO-DANISH BIOGAS COMPANY ApS

1994 – 2000

Chairman, AALBORG ENERGY AND ENVIRONMENT COOPERATION. AEEC

1991 – 1994

Board of Directors, NELLEMANN, RÅDGIVENDE INGENIØRER OG PLANLÆGGERE A/S

1985 – 1998

Board of Directors, HOWEDA A/S

1970 – 1991

Board of Directors, INGENIØR-HOLDINGSELSKABET AF 19.02.1970 A/S