ˈoʊlə mˌeɪd hɪz deɪbjˈuː ɪnðə dɪvˈɪziə ɐ dˈʊɹɹɪŋ ðə nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt slˈæʃ nˈaɪntiːnhˈʌndɹɪd nˈaɪnti nˈaɪn sˈiːzən æɾ ˌɛfsˈiː nˈæʃənəl wˌɛɹ hiː kˈɛpt ˌɔn plˈeɪɪŋ ʌntˈɪl ðə sˈʌmɚɹ ʌv tˈuː θˈaʊzənd fˈaɪv, wˌɛn hiː mˈuːvd tʊ ˌɛfsˌiːjˈuː pəlaɪtˈeɪnɪkə tˈɪmɪsˌoːɹə æz pˈɑːɹt ʌvðə dˈiːl wˌɪtʃ hæd bɹˈɔːt dʒˈɪdʒəl kˈoʊmən, ɡˈæbɹiːəl kˈɑːnuː, mˈɛɹɪəs pˈoʊpə ænd ɡˈæbɹiːəl kˈæɹɐmɚɹˌɪn tə tˈɪmɪsˌoːɹə ˈɜːlɪɚ ðæt jˈɪɹ.
Olah made his debut in the Divizia A during the 1998/1999 season at FC Național where he kept on playing until the summer of 2005, when he moved to FCU Politehnica Timișoara as part of the deal which had brought Gigel Coman, Gabriel Cânu, Marius Popa and Gabriel Caramarin to Timișoara earlier that year.