|Date of birth||21 March 1973|
|Place of birth||Czechoslovakia|
|2010–2011||1. FK Příbram|
|2011||FC Graffin Vlašim|
|2011–2013||FK Viktoria Žižkov|
|2013–2018||FC MAS Táborsko|
|2019–2020||1. FK Příbram|
|* Senior club appearances and goals counted for the domestic league only|
Nádvorník joined Vlašim as manager on 1 January 2009, taking over from Zdeněk Hašek. Nádvorník guided the team to the Bohemian Football League title in June 2009, with a thirteen-point lead at the end of the season.
Following a strong start to the 2010–11 Czech 2. Liga, with Vlašim leading the division on 4 October 2010, he moved to Czech First League side Příbram as a replacement for Martin Hřídel. His tenure only lasted six months however, as he was sacked in April 2011 following a sequence of five consecutive defeats. In June 2011, he returned to Vlašim as manager. After the autumn part of the 2011–12 Czech 2. Liga, Nádvorník moved to Czech First League liga side Viktoria Žižkov, replacing Martin Pulpit, with the club having taken just seven points from the opening 14 matches. Žižkov went on to be relegated with Nádvorník staying on as the club adjusted to life in the Czech 2. Liga, but with the club four points away from the promotion places after three games of the spring part of the 2012–13 season and not having scored in 291 minutes, he was replaced by Italian manager Giancarlo Favarin. Nádvorník joined Czech 2. Liga side FC MAS Táborsko in April 2013 with the objective of saving the club's status in the division. He was replaced as manager at Táborsko in the spring of 2014 due to personal issues.
- Bohemian Football League (1): 2008–09
- "Novým trenérem Vlašimi je Roman Nádvorník". denik.cz (in Czech). 18 December 2008. Retrieved 2 August 2011.
- "Vlašim byla v ČFL bez konkurence". denik.cz (in Czech). 30 June 2009. Retrieved 2 August 2011.
- "Příbram povede Nádvorník, který opouští druholigového lídra z Vlašimi". idnes.cz (in Czech). 4 October 2010. Retrieved 2 August 2011.
- "Trenér Nádvorník v Příbrami skončil, o jeho nástupci se jedná". idnes.cz (in Czech). 26 April 2011. Retrieved 2 August 2011.
- "Nádvorník znovu vedl Vlašim a připadal si jako ve Španělsku". idnes.cz (in Czech). 30 June 2011. Retrieved 2 August 2011.
- "Trenér Pulpit na Žižkově končí, zatím ho střídá Nádvorník". idnes.cz (in Czech). 23 November 2011. Retrieved 27 November 2011.
- "Viktoria Žižkov mění trenéry, postup do ligy má zajistit kouč z Itálie". idnes.cz (in Czech). 27 March 2013. Retrieved 7 April 2013.
- "Druhou fotbalovou ligu má Táborsku zachránit kouč Nádvorník". idnes.cz (in Czech). 3 April 2013. Retrieved 8 November 2013.
- "FC MAS Táborsko: A tým povede na jaře jako hlavní kouč Petr Frňka". Deník (in Czech). 12 February 2014. Retrieved 10 May 2014.
- Manager profile at idnes.cz (in Czech)