He moved to New York City, and began producing plays with actors such as Vinnette Carroll, Cicely Tyson, Calvin Lockhart, and James Earl Jones, as well as performances by Alvin Ailey's dance company.

He also produced shows in Europe and the Middle East, including plays by James Baldwin and Langston Hughes, as well as a concert tour by Marlene Dietrich.

[2] In 1968, Haizlip created and executive produced Soul!, an arts program which became a showcase for many African American artists and musicians, such as Ashford and Simpson, Roberta Flack, and poet Nikki Giovanni.

The mission of “Soul!” would be not merely to entertain African American viewers, but to challenge them to ponder the possible meanings of Black culture and Black community at a time when African Americans were driving America's social transformation...

was unapologetic about aiming its diverse and self-critical weekly affirmation of Black culture and politics to African American viewers, a group that had previously not had the pleasure of seeing itself widely, or truthfully, represented on television.."[3] Haizlip continued to actively promote African American culture through events such as the first Congressional Black Caucus Dinner in 1970; and "Soul at the Center", a 12-day festival of performing arts held at the Lincoln Center.