Arsenije Sečujac (Serbian Cyrillic: Арсеније Сечујац, German: Arsenius Feiherr Seczujacz von Heldenfeld; 1720 – 13 January 1814) was a Habsburg general who earned the rank of major general at the very end of his military career and was awarded the Knight's Cross of the Military Order of Maria Theresa, the highest Monarchy decoration, in 1762.

His father was Đorđe (or Georgije), a Habsburg military commander, and his mother was named Ana Stanisavljević.

[1] Having succeeded the noble status from his father, who had received the ennobling predicate "von Heldenfeld" (Serbo-Croatian: Heldenfeldski), Sečujac was elevated to baron on 29 December 1767 (and henceforth known as Baron Seczujacz von Heldenfeld).

in which the first counselor was bishop (eparch) Petar Petrović of the Archdiocese of Arad; on November 17, the same year, the counselor was general-major and baron Arsenije Sečujac; other notable members were Mihailo Maksimović, Uroš Nestorović, Teodor Avramović.

At the very end of his military career, on 24 February 1783, he was promoted to the rank of major general, but he retired on the 10 April that year.