Born in Chicago, IL. Sound recordist, mixer and re-recording/dubbing mixer in British films from 1945. Often working on 10 to 15 films each year, he amassed over 300 titles to his credit. Some notable (non-nominated) ones include BLACK NARCISSUS (1947), OLIVER TWIST and THE RED SHOES (both 1948), THE IMPORTANCE OF BEING EARNEST and THE PICKWICK PAPERS (both 1952), THE SWORD AND THE ROSE and THE (LITTLE) KIDNAPPERS (both 1953), Peter Glenville's THE PRISONER (1955), A TOWN LIKE ALICE (1956), THE PRINCE AND THE SHOWGIRL (1957), THE VIKINGS and A NIGHT TO REMEMBER (both 1958), PEEPING TOM, SWISS FAMILY ROBINSON and THE 3 WORLDS OF GULLIVER (all 1960), EL CID (1961), IN SEARCH OF THE CASTAWAYS (1962), 55 DAYS AT PEKING, THE THREE LIVES OF THOMASINA and THIS SPORTING LIFE (all 1963), THE FALL OF THE ROMAN EMPIRE, THE MOON-SPINNERS and GOLDFINGER (all 1964), THOSE MAGNIFICENT MEN IN THEIR FLYING MACHINES, MASQUERADE, BATTLE OF THE BULGE and THE HEROES OF TELEMARK (all 1965), KHARTOUM, FAHRENHEIT 451, FUNERAL IN BERLIN and DEADLIER THAN THE MALE (all 1966), YOU ONLY LIVE TWICE, THE BOBO and THE LAST SAFARI (all 1967), PRUDENCE AND THE PILL (1968), KRAKATOA, EAST OF JAVA, BATTLE OF BRITAIN, THE MADWOMAN OF CHAILLOT, ON HER MAJESTY'S SECRET SERVICE and THE PRIME OF MISS JEAN BRODIE (all 1969). The last 15 years of McCallums's credits include THE DEVILS (1971), FRENZY (1972), THE DAY OF THE JACKAL, JESUS CHRIST SUPERSTAR and THE WILD BUNCH (all 1973), THE TAMARIND SEED, GOLD, 11 HARROWHOUSE and THE ODESSA FILE (all 1974), ROLLERBALL and THE MAN WHO WOULD BE KING (both 1975), THE SLIPPER AND THE ROSE, THE SEVEN-PER-CENT SOLUTION and THE INCREDIBLE SARAH (all 1976), THE SPY WHO LOVED ME and F.I.S.T. (both 1977), THE GREEK TYCOON (1978), MOONRAKER (1979), MCVICAR (1980), CLASH OF THE TITANS and FOR YOUR EYES ONLY (both 1981), VICTOR/VICTORIA, BLADE RUNNER, PINK FLOYD: THE WALL and ENIGMA (all 1982), OCTOPUSSY and THE PIRATES OF PENZANCE (both 1983) and GREYSTOKE: THE LEGEND OF TARZAN, LORD OF THE APES and his last picture, SUPERGIRL (both 1984).  Nominated for Sound 1970: RYAN'S DAUGHTER (w. John Bramall)  Nominated for Sound 1971: DIAMONDS ARE FOREVER (w. John Mitchell & Alfred J. Overton)  Sound 1971: FIDDLER ON THE ROOF (w. David Hildyard)  Nominated for Sound 1978: SUPERMAN (w. Graham V. Hartstone, Nicolas LeMessurier & Roy Charman) 4 nominations, 1 Award