Ion Nunweiller was born in Piatra Neamț on 9 January 1936.[1][5] He had an Austrian father named Johann Nunweiller, who settled in Piatra Neamț after World War II where he met his wife, Rozina, later they moved from Piatra NeamțtoBucharest.[6] He had six brothers, the oldest one of them, Constantin was a water polo player and the other five: Dumitru, Lică, Victor, Radu and Eduard were footballers, each of them having at least one spell at Dinamo București, they are the reason why the club's nickname is "The Red Dogs".[6][7] Ion made his Divizia A debut, playing for Dinamo București on 12 August 1956 in a 2–0 victory against Dinamo Bacău.[1][5] Throughout his two spells at Dinamo București he won five Divizia A titles and three Cupa României, also appearing in the first European match of a Romanian team, the 3–1 victory against Galatasaray from the 1956–57 European Cup, helping the team go to the next phase of the competition where they were eliminated by CDNA Sofia, playing for Dinamo in a total of 19 European Cup matches in which he scored two goals in the 1963–64 edition, one in a 2–0 victory against East Germany champion, Motor Jena which helped the club advance to the next phase where they were eliminated by Real Madrid against whom he scored in a 5–3 loss and he also made one appearance in an Inter-Cities Fairs Cup match.[1][5][8][9][10][11] Nunweiller spent two seasons at Fenerbahçe from 1968 until 1970, making him one of the first Romanians to play professional football in Turkey.[8][12] During his period spent in Turkey, Nunweiller played four games in the 1968–69 European Cup where he helped Fenerbahçe eliminate the champion of England, Manchester City and in his second season spent at the club he was coached by Traian Ionescu and was teammate with Ilie Datcu, all of them previously working together at Dinamo, winning together the Turkish Super League title, a TSYD Cup in which he scored the only goal from the final against Beşiktaş, also being elected the best foreign player of the Turkish League 1969–70 season.[1][8][12][13]
After ending his playing career in 1972, Ion Nunweiller became the head coach of Dinamo București, managing to win the title in his first season.[5][8][15][16][17] He won two more titles with Dinamo, qualified Flacăra Moreni in the UEFA Cup, had an experience in Turkey at Bursaspor and obtained the first ever promotion to Divizia A of his hometown team Ceahlăul Piatra Neamț.[8][15] Nunweiller has a total of 374 matches as a manager in the Romanian top-division, Divizia A consisting of 163 victories, 76 draws and 135 losses.[18]
On 25 March 2008, Nunweiller was decorated by the president of Romania, Traian Băsescu for all of his achievements as a football coach, and for forming young generations of future champions with Ordinul "Meritul Sportiv" — (The Order "The Sportive Merit") class III.[19]
Ion Nunweiller died on 3 February 2015 at age 79 in a hospital from Pitești.[8][15][16][17][20][21] He was buried in a cemetery from Albota, his coffin being wrapped up in the flags of Dinamo București and Fenerbahçe.[17][20][21] After his death, his former Dinamo teammate, Cornel Dinu talked about him:"He was the creator of the symbol of The Red Dogs and the main pillar of resistance through which the great team was built from the beginning of the 60s. A player who had many moments in which he showed heroism in blocking the opponent and making sure that his own defense was not overtaken. He was an indisputable leader of that period and achieved good things, as a coach, after the 70s, also in the position of leader of Dinamo. Both as a player and as a coach, he transmitted this spirit of fight and loyalty in the service of the team."[16]
