for an assistant's job, Heath was hired as an office "gofer" for the large Manhattan advertising agency Benton & Bowles, earning $35 weekly. He continued looking for work as an artist on his lunch hour, and in 1947, landed a $75-a-week staff position at Timely Comics, the 1940s predecessor of Marvel Comics. Initially working in the Timely offices, Heath, like some of the other staffers, soon found it more efficient to work at home. He and his new wife had been living at his parents' home and continued to do so for two more years, while saving money for their own house. By the mid-1960s, however, they had children and were divorced. The artist said in 2004 he believed his first work for Timely was a Western story featuring the Two-Gun Kid. Historians have tentatively identified his first work as either a Kid Colt story in the omnibus series Wild Western #4 (Nov. 1948); the second Two-Gun Kid story in Two-Gun Kid #5 (Dec. 1948), "Guns Blast in Thunder Pass;" and the Two-Gun Kid story in Wild Western #5 (Dec. 1948), while confirming Heath art on the Kid Colt story that same issue. Heath's first superhero story is tentatively identified as the seven-page Witness story, "Fate Fixed a Fight," in Captain America Comics #71 (March 1949). 1950s Heath drew several Western stories for such Timely comics as Wild Western, All Western Winners, Arizona Kid, Black Rider, Western Outlaws, and Reno Browne, Hollywood's Greatest Cowgirl. As Timely evolved into Marvel's 1950s iteration, known as Atlas Comics, Heath expanded into other genres. He drew the December 1950 premiere of the two-issue superhero series Marvel Boy, as well as scattered science fiction anthology stories (in Venus, Journey into Unknown Worlds, and Men's Adventures); crime drama (Justice); horror stories and covers (Adventures into Terror, Marvel Tales, Menace, Mystic, Spellbound, Strange Tales, Uncanny Tales, the cover of Journey into Mystery #1), satiric humor (Wild, Mad), and war stories. Heath produced combat stories both for the wide line of Timely war titles and the first issue (Aug. 1951) of EC Comics' celebrated Frontline Combat. He contributed to Mad #14, illustrating Harvey Kurtzman's parody of Plastic Man. Heath later did the first of many decades' worth of war work for DC Comics, with Our Army at War #23 and Star Spangled War Stories #22, both cover-dated June 1954. Other 1950s work includes an issue of 3-D Comics