Kathleenning teatr loyihalari orasida: Angels in America (Toni va Drama Desk mukofotlariga nomzod), Racing Demon va Dance With Me. Ekspirimental qo'yilishlarda ishtirok etgan: A Woman of the World, Wit (Drama Desk, Lucille Lortel, Outer Critics Circle, Drama League, Connecticut Critics Circle va Obie mukofotlari), For Peter Pan on Her 70th Birthday, A Walk in the Woods (Drama Desk mukofotiga nomzod), Tales from Red Vienna, Miss Ovington & Dr. Dubois, Talking Heads (Obie mukofoti), Dead Man’s Cell Phone, Nine Armenians (Drama Desk mukofotiga nomzod), Henry V (Callaway mukofoti). Bundan tashqari, Nyu-Yorkdagi qo'yilishlarda ishtirok etgan: "Monologlar vaginasi", Iphigenia and Other Daughters, Endgame, Sister Mary Ignatius..., The Investigation of the Murder in El Salvador. Chalfant filmlarda suratga tushgan: Isn’t it Delicious? "Prizrachnyy patrul", The Bath, In Bed With Ulysses, "Lillian", "Nichego lichnogo", The People Speak, "Lakavanna Blyuz", "Idealnyy neznakomets", "Temnyy voda", "Doktory Kinzi", "Proyekt Larami", "Pautina lzhi", "Dorozhe rubinov", Murder and Murder. Televizion loyihalar: "Lovers" serialidagi epizodik rol, "Shtamm", "Amerikaliklar", "Kartochnyy domik", "Spasi menya", "Kitob Daniyel", "Spasatel", "Qonun va tartib", "Bir hayot, bir umr"; "Davlat kotibi", "Kayf s dostavkoy", "Elementarno", "Muhammad Ali asosiy jangi" (HBO), "Jordjiya O'Kiff" (Lifetime) va Voices from the White House (PBS). 1996 yilda u Sustained Excellence OBIE mukofotini olgan. Shuningdek, 2004 yilda Lortel mukofotining Sustained Excellence of Performance nominatsiyasi laureati, 2015 yilda League of Professional Women tomonidan Lifetime Achievement mukofoti va 2018 yilda OBIE mukofotining Lifetime Achievement nominatsiyasi laureati bo'lgan. U Drama League va Sidney Kingsley mukofotlarini olgan va Kuper-Yunionda fahriy gumanitar fanlar doktori unvoni bilan taqdirlangan.