Brian Sietsema serves as the dictionary authority for the Scripps National Spelling Bee, confirming pronunciations and etymologies that challenge young competitors. His path to this unique position began not in academia, but with a third-grade encounter with an unfamiliar word in an Edgar Allan Poe story purchased at a garage sale.

The word 'akimbo' baffled Sietsema, stumping his parents, teachers, and even multiple dictionaries. This early puzzle sparked a lifelong fascination with language origins and meanings, ultimately leading him to abandon plans for nuclear engineering in favor of linguistics. He enrolled at MIT to study generative grammar under Morris Halle, focusing on the structural patterns that shape how we speak.

Sietsema's dissertation examined how metrical units predict tonal patterns in Bantu languages, research with implications for natural-sounding machine speech synthesis. After graduating in 1989, he joined Merriam-Webster as pronunciation editor, updating the very dictionaries that once failed him. His work bridges theoretical linguistics and practical lexicography, ensuring spellers get accurate word information.

Today, Sietsema balances his linguistic expertise with his role as Father Mark at Holy Trinity Greek Orthodox Church in Lansing, Michigan. His interdisciplinary background—spanning theology, ancient languages, and modern linguistics—reflects a career built on curiosity about how language works across cultures and contexts.