From 1893 to 1902 he trained at Göttingen, where he wrote a thesis in German about the French imperfect subjunctive.
His wife Marguerite Sechehaye was a psychotherapist and a pioneer in the psychoanalytic treatment of schizophrenics.
[1] Sechehaye was influenced by the psycholinguistics of Wilhelm Wundt and made contributions to theoretical linguistics.
He is credited by Pieter Seuren, historian of linguistics, as probably the first person to propose formal grammar as a universally constrained system of meaning expression.
Sechehaye was the first to use the term 'syntactic transformation' in its modern sense in his 1908 Programme et méthodes de la linguistique théorique: psychologie du langage.