From 1988 to 1989 Ryś worked as a vicar in the parish of Saints Margaret and Catherine in Kęty. From 2004 to 2007 he was the director of the Archives of the Metropolitan Chapter in Krakow. He was also a commentator on the pilgrimages of John Paul II on Polish Television and Polish Radio. After the latter's death, Ryś co-organized vigils, while during the beatification process he sat on the historical commission of the Rogatory Tribunal. He became the head of the Department of Church History in the Middle Ages and the Department of Ancient and Medieval History at the Institute of History at the Faculty of History and Cultural Heritage of the Pontifical University of John Paul II. In the years 2007 to 2011 Ryś was the rector of the Major Seminary of the Archdiocese of Krakow, in addition, in the years 2010 to 2011 he was the chairman of the Conference of Rectors of Theological Seminary in Poland.
Ordination as bishop
On 16 July 2011, Ryś was appointed by Pope Benedict XVI as auxiliary bishop of the Archdiocese of Kraków as well as the titular bishop of Arcavica. He was ordained an episcopate along with Damian Muskus on 28 September 2011 in the Wawel Cathedral, with the consecrator being Cardinal Stanisław Dziwisz, metropolitan archbishop of Kraków, and co-consecrators cardinals Franciszek Macharski, archbishop emeritus of Kraków, and Stanisław Ryłko, chairman of the Pontifical Council for the Laity. Ryś choose "Virtus in infirmitate" as his bishops motto. On 14 September 2017Pope Francis appointed Ryś as the new archbishop of Łódź. He was officially installed as archbishop in the Archcathedral Basilica of St. Stanislaus Kostka on 4 November 2017. On 29 June 2018 was officially bestowed with his pallium in a ceremony at St. Peter's Basilica in Rome, and it was solemnly imposed on him on 5 October 2018 in the Łódź cathedral by Archbishop Salvatore Pennacchio, the Apostolic Nuncio in Poland.
Life as Bishop
In 2018 Ryś convened the fourth synod in the history of the Archdiocese of Łódź on the question of introducing the permanent diaconate to combat the shortage of priests. In 2019 he introduced the permanent diaconate in the archdiocese, and also created the International Diocesan Missionary Seminary for the new Evangelization of Redemptoris Mater for seminarians who are part of the Neocatechumenal Way. On 25 June 2020 Ryś was appointed by Pope Francis as the Apostolic Administrator sede plena for the Diocese of Kalisz.