Kai is currently a member of the ASCAP (American Society of Composer, Authors, and Publishers), MTNA (Music Teachers National Association), National Guild of Piano Teachers, Teacher Division of American College of Musicians, AGO (American Guild of Organists), and the National Honor Society of Pi Kappa Lambda. In 2003 and 2004, Mr. Lin worked as a judge for Tidewater Music Teacher Forum, Honor Recital Audition for Piano, Levels of Progress, Virginia Beach Federation of Music Club, Junior Festival for Piano Solo and Duet, Music Theory Tests at Dominion University, Ohio Federation of Music Club, for Junior Music Festival, District III-E, Piano Solo at University of Dayton. He also serves as the Director of Music at the Trinity Evangelical Lutheran Church in Norfolk, Virginia, teaching piano and theory lessons at Norfolk Collegiate School, Temple of Music, and his studio.

He served as the Director of Music at Corpus Christi Church, Dayton, Ohio from 1997 to 2003, and taught piano lessons at Hauer Music and Shaw's Music Center in the Greater Dayton, Ohio area.

Kai was one of the major former piano accompanists, a lecturer of music theory at the Shanghai Conservatory of Music, and a piano teacher at the Children Music School in that conservatory, winning the Excellent Education Award. He received the Graduate Scholarship and Graduate Assistantships Awards from both Ohio University School of Music and College-Conservatory of Music at the University of Cincinnati, working as a piano accompanist, teaching courses of Music Theory, Ear-Training/Sight-Singing, and completing his graduate studies in the master and doctoral programs with national-level honors.

Mr. Lin is also an accomplished conductor, composer, and arranger. Some of his music compositions and CDs are published, and warmly received by both his audience and critics in China and USA.