The Hans Sikorski Publishing Group, founded by his father in 1935, is unusual in Germany in publishing both serious and popular works. Headquartered in Hamburg, the Sikorski group includes more than 30 companies in ten countries. On the occasion of his birthday, Professor Sikorski was honored by the Federal Republic, GEMA and DMV, the music publishers' society. Professor Sikorski has given particular attention to developing cultural links with Eastern Europe and the former Soviet Union, and his company represents virtually all of the major works of 20th century Russian composers, including Prokofiev, Shostakovich, Khachaturian and Albert Schnittke.
Contemporary music is another major interest.
Most remarkable, the professor has sought out contemporary women composers. Under his guidance, Sofia Gubaidulina, Galina Ustvolskaya and Giya Kancheli, among others, have won international reputations. Professor Sikorski has been active in many national and international music organizations. He is Vice President of DMV, the German music publishers' group, Deputy Chairman of the board of supervisors of GEMA and Honorary President of the Hamburg Conservatory. Professor Sikorski has written extensively on the new media and problems of copyright in the digital age.