Most, if not almost all, Messianic "Jewish" leaders are ordained Christian pastors and ministers. Many have also attended Christian evangelical schools. For instance, here is a list of Messianic leaders who graduated from Trinity Evangelical Divinity School, a school of the Evangelical Free Church of America:
Murray Tilles: Executive Director/Missionary of Light of Messiah Ministries
John Fischer: Leader of Congregation Ohr Chadash and Professor and Chairman of Department of Judaic Studies, St. Petersburg Theological Seminary (This is a Christian seminary)
Dan Juster: Co-founder of Tikkun Ministries and Director of The King's Jewish Voice (This is part of the Christian Pentecostal seminary, The King's University)
Michael Rydelnik: professor of Jewish Studies in the World Missions and Evangelism department at Moody Bible Institute
Jeffrey Feinberg: Leader of congregation Etz Chaim and faculty member for the Master's of Divinity degree with a concentration in Messianic Judaism at the Denver Seminary (This is a Christian seminary)
The following Messianic leaders are currently studying at or took some courses at Trinity:
Jhan Moskowitz: North American Director of Jews for Jesus
Wes Taber-Missionary for Life In Messiah/AMF International
Overall, real Jewish leaders do not attend Christian divinity schools.
On a sidebar, I've noticed that Dan Juster has taken to calling himself a "rabbi" recently. This is pretty interesting since Juster is not even Jewish.