He was a fellow of the American Academy of Arts and Sciences[5] and is considered to be a pioneer of Modern Greek studies.

He spent several years there at a metochion of Saint Catherine's Monastery, of which Evangelinos' uncle, the hieromonk Konstantios, was the administrator.

He attended school for one year studying Greek classic authors, under the instruction of different reputable scholars, including Anthimos Gazis.

Evangelinos did not stay at Amherst for long; he moved to Hartford where he published A Greek Grammar for the Use of Learners and taught mathematics.

[9] Around the same period, Alexander Negris published his book A Grammar of the Modern Greek Language, with an Appendix Containing Original Specimens of Prose and Verse.

Evangelinos continued writing books, prolifically, including his famous Greek Lexicon of the Roman and Byzantine Periods from B. C. 146 to A. D. 1100.

[9] He was remembered at Harvard as a monastic, eccentric, outwardly cynical, but inwardly soft-hearted scholar.

Later in life, he communicated with the monks of Saint Catherine's Monastery on Mount Sinai via telegraph.