Mark Shane has one of the longest working careers in American classic jazz and almost no paper trail. There is no Wikipedia article, no birth date on Wikidata or MusicBrainz, and no published interview that gives a year or a hometown. What exists instead is the work: roughly ninety recordings across four decades, four film soundtracks, and a résumé of bandstands that runs from Eddie Condon's club to an HBO prestige drama. He began professionally in dance bands around metropolitan New York, and by his own account learned jazz from records rather than from a school, naming Louis Armstrong, Teddy Wilson, Earl Hines, Fats Waller, Coleman Hawkins, Lester Young and Benny Goodman as the sources.

The job that made him was the house piano chair at Eddie Condon's, the last of the three New York rooms that carried the guitarist's name, on East 54th Street, where cornetist Ed Polcer led the house band until the club shut in the mid-1980s. Condon's was a hot-ensemble house rather than a soloist's room, and the discipline of feeding a front line night after night is the thing every later assessment of Shane keeps returning to. The Mississippi Rag called him "one of the great accompanists of his time," a line his own publicity has quoted ever since, and Michael Steinman's JAZZ LIVES blog described what it sounded like from the other side of the bandstand: playing "behind everyone, listening, creating a generous, mobile harmonic platform."

His first sustained recorded association was with soprano saxophonist Bob Wilber. Shane was the pianist in Wilber's Bechet Legacy from its start, appearing on the band's self-titled debut, cut live at Bechet's in New York on January 22, 1981, on On the Road, recorded November 24, 1981 at Strawberry Studios in Stockport, England, and on Ode to Bechet, taped at Vanguard Studios in New York on August 5 and 6, 1982 with Vic Dickenson and Butch Miles. He shot the front cover photograph for On the Road as well. The Wilber connection ran on for thirty-five years, through the 1999 King Oliver repertory project and the Bob Wilber Quintet's Atlanta Blues in 2016. Alongside it came work with Buck Clayton, whose A Swingin' Dream he played on in 1989, with Buddy Tate, with Benny Goodman, and, as Steinman put it, a long apprenticeship with Wilber and Ruby Braff that made him "a fully mature player."

Two other strands ran in parallel from the 1980s. One was film. Shane played jazz piano on the Grammy-winning soundtrack to The Cotton Club (1984) and on Brighton Beach Memoirs (1986); his own biography also claims Biloxi Blues and Working Girl, neither of which credits him on the released album. The other was the formal concert circuit, which reached further than his club work suggests: the Benny Goodman fiftieth-anniversary memorial concert at Carnegie Hall, Carnegie Hall's own centenary celebration in 1991, where he accompanied hosts Beverly Sills and Barbara Walters, a royal command performance of Duke Ellington's The Queen's Suite for Princess Anne at the Royal Festival Hall in London, tours for Columbia Artists and with the Smithsonian Jazz Repertory Ensemble, and piano for the Twyla Tharp Dance Company. A promotional sticker on the sleeve of his Jazzology LP Blueberry Rhyme records another engagement of that period in four words: "Grande Parade du Jazz, Mark Shane, featured piano soloist, Nice 1987."

His own records started with that LP, issued as Volume 41 of Jazzology's Jazz Piano Heritage Series with bassist Dave Shapiro and drummer Danny D'Imperio. Blue Room followed in 1992 on Kama Disc, an octet date that assembled most of the Condon's circle at once: Ed Polcer, Spanky Davis, Tom Artin, Ken Peplowski, Frank Vignola and two bassists, Bill Crow and Earl May, with liner notes by Dan Morgenstern. The singer on that record, Terry Blaine, became his longest partnership. The two met in the mid-1980s and held a four-year engagement at New York's Café Society that ended in 1991, then made a string of albums together: With Thee I Swing! for the German label Nagel Heyer in 1997, Lonesome Swallow in 2002, and Swingin' the Benny Goodman Songbook with clarinetist Allan Vaché in 2004. Nagel Heyer became his other recorded home through the late 1990s, putting him in the New York Allstars, the International Allstars, the Joe Ascione Octet and, at the head of his own band for once, What Would Santa Say?, credited to Mark Shane's X-mas Allstars. He also recorded the two-piano album Just You, Just Me & Two Pianos with Johnny Varro for Solo Art, taped live at the Atlanta Jazz Party across April 1998 and April 1999.

The solo records are self-released, on his own Amber Lake imprint, and none of them appear in the Discogs catalog under their proper listings: Riffles in 2003, Fats Lives!! in 2007 with a band he called the Shane Gang (Jon-Erik Kellso, Dan Levinson, Brian Nalepka and Kevin Dorn), and Ticklin' in 2011, titled for the Harlem "ticklers" and built on repertoire like "Cryin' for the Carolines" and James P. Johnson's "Fascination." Since 2008 he has been a regular pianist for singer Catherine Russell, appearing on seven of her albums from Sentimental Streak through Send for Me (2022), including the Grammy-nominated Harlem on My Mind. When Vince Giordano's Nighthawks needed a pianist for Woody Allen's Café Society and the band's regular man Peter Yarin was unavailable, Giordano hired Shane; Giordano's account of the session was that he was "lucky to have the ever-swinging and very tasteful Mark Shane on piano," who made "very interesting and wonderful improvements" on the written charts.

The widest audience came from television. Shane is one of four pianists credited for the piano tracks on Boardwalk Empire Volume 1: Music from the HBO Original Series (Elektra, 2011), alongside Ehud Asherie, Peter Mintun and Rossano Sportiello; the album took the 2012 Grammy for Best Compilation Soundtrack for Visual Media. He continues to record and teach. The Song In Our Soul, credited to the Palomar Trio with Dan Levinson and Kevin Dorn, came out on Turtle Bay Records in 2023, and he has taught a Classic Jazz Piano course and a stride piano master class at SUNY Orange. He lives in Walden, in Orange County, New York, with his wife, the singer, pianist and church organist Alice Nielsen-Shane.

Shane is a stride and swing pianist who plays the idiom as a working language rather than a restoration project. His own account of the lineage names James P. Johnson, Fats Waller, Teddy Wilson, Count Basie, Earl Hines and Art Tatum, and the less obvious half of the picture is that he also absorbed a good deal from Hank Jones and Tommy Flanagan, which is where the harmonic detail and the light touch come from. Michael Steinman, who has written about him more than any other critic, made the distinction directly: Shane "can swing in a way that is deeply reminiscent of Fats, Teddy, James P.," but "he is no archaeologist, no copyist perfecting what he's memorized from the manuscript," and "he's no museum piece, either." There is classical training somewhere behind the touch, audible in the control at speed. What the reviews consistently single out is restraint rather than display: Jazz Journal International called one performance "faultless, relaxed, swinging and subtle," Cadence found his work "irresistibly joyous," and JazzReview.com wrote that "the preservation of the stride piano style is perfectly safe in the creative hands of Mark Shane." He is on the Steinway international roster of piano artists, and his own line about the instrument is that "for every nuance of my musical feelings, the Steinway is a dream come true."