Born on 01 March 1950 in Švendubrė, Varėna district (now Druskininkai municipality).
In 1973 he graduated from Vilnius University in Library Science and Bibliography. Since 1973 he has worked at the Klaipėda Public I. Simonaitytė Library in various positions. From 2008 to 2019 as Director. Currently Chief Librarian. Chairman of the Klaipėda branch of the Lithuanian Writers' Union. His works have been translated into Russian, Polish and English. Most of his works have also been published in audiobook format. Šikšnelis is also a sculptor - he carves wood and stone sculptures, and has held more than 50 exhibitions in Lithuania and abroad.