Performances
   Jack has led his bands and has been employed as a sideman throughout the U.S. resulting in approximately 11,000 performances. He has also played with name artists too numerous to mention including:

      Luciano Pavarotti, Rosemary Clooney, Nancy Wilson, John B. Williams, Roy McCurdy, Frankie Laine,             Richie Crabtree, Maureen McGovern, Cab Calloway, Jay Leno, Bob Hope, Louie Bellson, Vic Damone,          Tom Jones, Al Martino, Joel Grey, Mel Rhyne, Bobby Rydell, The Drifters, The Crystals, Lainie Kazan,          David Benoit, Ira Sullivan, Ed Thigpen, Howard Levy, Debbie Reynolds, Lana Cantrell, Buddy Montgomery,  

The Barnum and Bailey Circus, Holiday on Ice, Bob Newhart, Buddy Montgomery, Doc Severinson,             Myron Floren and the Stars of the Lawrence Welk Show tour, Margaret Whiting, Rose Marie, Eartha Kitt,     Helen O'Connell, John Gary, Chad Mitchell, Henny Youngman, Martha Ray, Jim Kerhin, Buster Williams,     Roger Williams, Percy Faith, Paul Wertico, Rita Moreno, Morton Gould, Lucas Foss, McCoy Tyner, June Valli, Anna Marie Albergetti, Barry Williams, John Raitt, Jerry Vale, Bobby Vinton, Jimmie Rodgers, Trini Lopez,    Donna Fargo, Art Hoyle, Tal Farlow, Barry Harris, Mamie Van Doren, Mark Eagan, Gary Willis, Carol Channing, Rufus Ried, Donald O'Connor, Slide Hampton, Johnny Padilla, John Scofield, Ritchie Cole, Stu Katz,       Marlena Shaw, Marlene Rosenburg, Jerry Van Dyke, Fabian, Richard Hayman, Marcus Roberts, Phyllis Newman, Sandler and Young, Sergio Franchi, Greg Federico, Michael Feinstein, Dane Richeson, Skitch Henderson, Tommy Leonetti, Gloria Loring, Jimmy Webb, Theodore Bikel, Adam Levy, Stanley Jordan, Harold Jones,     Ernie Adams, Dennis Day, Jackie Allen, Nancy Ames, Phil Ford, Mimi Hines, Hans Sturm, Jeff Pietrangelo,    Greg Koch, Berkeley Fudge, Muriel Anderson, Tim Reynolds, Kirk Tatnall, Steve Peplin,  Leigh Cowan,          Bill Schaefgen,  The Bar "O" Ranch, Bill Martin, Sam Belton, Steve Nelson-Raney, Bob Russell, Ben Hans,      Scott DuBois,  The Milwaukee Symphony Orchestra, The Bell City Brass,  John Price, Barry Velleman,            Bob Ockenden, The Jimmy Dorsey Orchestra, The Milwaukee Choristers,  Scott Currier,  Harold Miller,

Andy LoDuca,  Jill Jensen, The Chuck Howard Superband, Hod O'Brien, Stephanie Nakasian, 

Rick Holmes, Tommy Sheridan, Christopher Kringel, Del Bennet, Jamey Aebersold, Kaye Berigan,                    and Randy Knackert with 45rpm.

Endorsements
     Jack uses whatever picks, guitars, cables, strings, amps and speakers needed to present his daily musical vision.  His tone comes from his fingers.  His music comes from his brain, shaped by life experience.

However, to make his music realized in the real world for others to hear, he uses, may use or has used:

     Raezor's Edge speaker cabinets:  The Jack Grassel model JG-10

     George L cables

     Surf picks

     Moshay picks
     Hofner guitars, 1999-2005
      Walter Woods amplifiers
     Fender & Guild guitars,1998
     Gibson guitars, 1991

     Jack patronizes Lincoln Music,  Schmitt Music, Paramount Guitars and JHale Music.

     Dennis Rauen, Jim Eanelli, Dan Smocke and Ron Jones service Jack's guitar.

     The official gig-mobile is kept running by McFarland's and Pinkalla of Racine, WI.

     Jack's fingernails are maintained by Tom at T & C NAILS, N81 W15074 Appleton Avenue in                                                                                                                                                                                         Menomenee Falls, WI.

Writings

      Music Ed Magic, 2009
      Just Jazz Guitar Magazine, columnist, 1996-2005
      City Edition, jazz record reviewer, 1995-1998
      Art Muscle, performance reviewer, 1995
      Madison Music Cooperative, "Power Practicing" columnist, 1996
      Minneapolis Jazz Newsletter, "Power Practicing"columnist, 1996
      Guitar Player Magazine, "Master Series" columnist, 1987-1990

Education
    Private study:
         George Van Eps, Tal Farlow, Billy Bauer, Joe Daley, Dave Holland, Don Momblow, George Pritchett,
         Emile DeCosmo, Ted Ashford, Roy Plum, Don Grzanna, Bill Ruddy, Jimmy Wyble, Conrad Kish, ..... ..............and attempted to study with: Ed Bickert, Cecil Taylor and Sam Rivers.

    Study at schools:
         The University of Wisconsin: Madison, Waukesha, Milwaukee campuses (as music scholarship student}

Teaching

      Musician's Institute, guest artist, 2009

      Wisconsin Lutheran College, adjunct faculty, 2003- 2007

      Western Illinois University, guest artist, 2006, 2007

      University of Illinois, guest artist, 2006
     Hofner Guitar Company, clinician, 1999-2005

      Milwaukee Area Technical College, - department chairman, coordinator of instruction,                                                        creator of the Music Occupations degree program: 1983-2004
      Fender / Guild Guitar Company, clinician, 1999
      National Guitar Workshop Jazz Summit, jazz faculty, 1995-1998
      Gibson Guitar Company, clinician, 1991
      Wisconsin Conservatory of Music, jazz degree program, faculty, 1971-1984
      Young Audiences of Wisconsin, coordinator of jazz presentations in elementary schools, 1971-1987
      Southern Illinois University, guest artist, 1988
      Birch Creek Music Center, jazz faculty, 1987
      Millikan University, guest artist, 1981
      University of Wisconsin Whitewater, adjunct faculty, 1976
      Cascio School of Music, instructor, 1965-1971
      Modern Music School, instructor, 1962-1965