Kata Tar was born in Hungary, Dunaújváros during the time of Communism. She is single, yet she has a big family. She has three brothers and one sister, seven nephews and five nieces. Her mother was Jewish and received the Lord in 2016; she is now with Him. Her father is alive but does not know the Lord yet. Kata got saved in 1988 through the witness of her Gentile friends. Kata has 9 years of ministry experience with other organizations that seek to bless the Jewish people, and 17 years of teaching experience at elementary and high schools. She has taught English, Hungarian, and Russian. Before she joined Jews for Jesus, she taught English at the school of the Jewish community in Budapest. Her ministry with Jews for Jesus has opened many opportunities for her to plant gospel seeds in Jewish and non-Jewish hearts and to lead several Jewish people to their Messiah, Jesus. She has been leading the work in Budapest since 2018. Since then, online evangelism has become strong. Reaching out to Holocaust survivors and young secret believers have also become prominent areas of her ministry.

Ildikó Hajdu was born in Budapest during the time of Communism. Her mother was Jewish; her father worked as a party functionary. She has one younger brother who lives with his family in Germany. Ildikó grew up as an atheist, consciously denying the existence of God. After she married, she gave birth to two sons in the early 90s. She was 30 when she lost her mother from cancer. This loss was very traumatic for her, as she had a very good relationship with her mother. She was 34 when her father died. She was now an orphan.

Ildikó was 36 when she gave her life to Jesus through the testimony of a former rock musician. Ildiko worked in various sales fields for more than 10 years. During this time, she led many people to the Lord, including her own family. At the age of 41, the next tragedy struck her: she lost her husband overnight. She was left without physical support. But the Lord did not abandon her; He helped them to overcome their grief. In 2011, she joined the Budapest team of Jews for Jesus as a volunteer, and since 2016 she has been working with them full time. Evangelism is one of her main strengths. She is actively involved in caring for Holocaust survivors and discipling young seekers. She loves working in teams. Her two adult sons are also serving the Lord.