ɪn ˈɔːɡəst tˈuː θˈaʊzənd sˈɛvəntˌiːn, ˈæmbɹɪz wʌz ɐpˈɔɪntᵻd mˈænɪdʒɚɹ ʌv nˈɛkæksə, stˈeɪɪŋ wɪððə klˈʌb fɚɹə jˈɪɹ; hiː wˈʌn ðə klˈɔːsɜːɹə tˈuː θˈaʊzənd ˈeɪtiːn kˈoʊpə ˌɛmˈɛks wɪð nˈɛkæksə, bˈiːɾɪŋ təlˈuːkə wˈʌn zˈiəɹoʊ ɪnðə fˈaɪnəl tʊ ˈɛnd ɐ nˈaɪntiːnjˈɪɹ tɹˈoʊfilˈɛs dɹˈaʊt fɚðə klˈʌb.
In August 2017, Ambríz was appointed manager of Necaxa, staying with the club for a year; he won the Clausura 2018 Copa MX with Necaxa, beating Toluca 1–0 in the final to end a 19-year trophy-less drought for the club.