Complex sentence: In 1997, he founded The Tbilisi Municipal Orchestra that brought the band leader even more recognition, as today, the orchestra aka "Tbilisi Big Band" or "Tbilisi Concert Orchestra" is one of the most highly sought orchestras in the post-Soviet region.
Split into simpler sentences: In 1997, he founded the Tbilisi Municipal Orchestra, which brought the band leader even more recognition. Today the orchestra, also known as the Tbilisi Big Band or the Tbilisi Concert Orchestra, is one of the most highly sought orchestras in the post-Soviet region.