[1] As an artist, Sloan's work has been exhibited at the Grand Palais in Paris; the Photographic Resource Center at Boston University; Southeastern Center for Contemporary Art in Winston-Salem, North Carolina; the Harvard Museum of Natural History; the American Philosophical Society in Philadelphia; the High Museum in Atlanta; and the United States National Academy of Sciences.
Sloan's assemblage photographs illustrate Rarest of the Rare: Stories Behind the Treasures at the Harvard Museum of Natural History, with writer Nancy Pick and a foreword by E.O.
An active grant-writer who secures funding from major foundations, government agencies, and private donors, Sloan's efforts bring international artists to the United States for residencies and exhibitions.
[citation needed] After being the director and chief curator of the Halsey Institute for Contemporary Art for two decades (hosting 243 exhibitions), Mark Sloan announced his retirement in 2020.
Sloan has authored or co-authored twenty-one books on subjects as various as Russian conceptual art, early 20th century circus life, and the Harvard Museum of Natural History.
Their titles reflect the hyperbole of the circus: Hoaxes, Humbugs, and Spectacles: Astonishing Photographs of Smelt Wrestlers, Human Projectiles, Giant Hailstones, Contortionists, Elephant Impersonators, and Much, Much, More!
Sloan and frequent collaborator Roger Manley have produced a number of exhibitions and book projects, including Self-Made Worlds: Visionary Folk Art Environments in 1997.
Lonnie Holley, Katrina Andry, Alyson Shotz, Jasper Johns, Shepard Fairey, Fahamu Pecou, Jennifer Wen Ma, Eames Demetrious, Lesley Dill, Renee Stout, Pat Potter, Jumaadi, Yaakov Israel, Kathleen Robbins, Hung Liu, Juan Logan, Shimon Attie, Tanja Softic, Nick Cave, William Wegman, Edward Burtynsky, Emmet Gowin, Duane Michals, St. EOM (Pasaquan), Georgia Blizzard, Gay Outlaw, Pinky Bass, David Maisel, Leon Golub, David Stern, Susanna Coffey, Garth Evans, Oriane Stender, Mr.
Imagination, Regina Frank, E.H. Sorrells Adewale, Quashie, The Art Guys, Jerome Meadows, Kevin Kelley, Volker Seding, Deborah Luster, Motoi Yamamoto, Simon Norfolk, Gideon Bok, Sumakshi Singh, Paola Cabal, Rimma Gerlovina and Valeriy Gerlovin, Jerry Uelsmann, Maggie Taylor, Evon Streetman, Larry Burrows, Craig Barber, Rikuo Ueda, Richard McMahan, Leslie Wayne, Ruth Marten, Sonya Clark, Loren Schwerd, Louis St. Lewis, Kendall Messick, Tiebena Dagnogo, Phyllis Galembo, Aldwyth, Talia Greene, and Althea Murphy-Price.