首席 (しゅせき)head; chief; chairman

head; chiefnoun (common) (futsuumeishi), nouns which may take the genitive case particle 'no'
chairman; governor; presidentnoun (common) (futsuumeishi)
top student; head of the classnoun (common) (futsuumeishi)
top seat; first desk (in orchestra)noun (common) (futsuumeishi)

首席, its kanji, and other words that share them.Open this graph

Kanji in 首席

首相しゅしょうprime minister; chancellor (Germany, Austria, etc.)
首脳しゅのうhead; leader
党首とうしゅparty leader
首都しゅとcapital city; metropolis
首くびneck
首位しゅいfirst place; head position
首都圏しゅとけんthe capital city (often Tokyo) area (typically within 50 km of city's centre) (center)
一首いっしゅone tanka; one poem
主席しゅせきhead; chief
議席ぎせきparliamentary seat
出席しゅっせきattendance; presence
席せきseat
打席だせきbatter's box; one's turn at bat
席上せきじょうat the meeting; on the occasion
同席どうせきpresence; sitting with
出席者しゅっせきしゃthose present; attendance

See how 首席 connects to the rest of Japanese.