In 1954 he became president of the
New York, New Haven and Hartford Railroad after a proxy fight in which the previous president,
Frederic C. Dumaine Jr., was ousted. McGinnis was part of the group which had installed Dumaine's father in the same position in 1948. He made substantial changes in his tenure there, the most visible being the introduction of a new black, vermilion, and white livery which was designed by
Herbert Matter (not, as is sometimes claimed, by McGinnis’s wife, though she apparently had some input). He disdained electrification as outmoded and had intended to discontinue it east of
Stamford, Connecticut, and to that end ordered diesels intended to replace the electrics, though the order of
EP-5 "jets", rectifier locomotives which had been ordered under the previous administration, had to be pressed into service on their arrival. These innovations did nothing to improve the railroad's situation. McGinnis continued the practice of maintenance cutbacks, and the new equipment was plagued with technical problems. The
1955 Connecticut floods, the result of two successive hurricanes, damaged the railroad extensively, and permanently cut the line from Hartford to Boston. The railroad's finances continued to deteriorate, his own board questioned his management, and on January 20, 1956, he resigned. ==Boston and Maine presidency==