TextNow hired Chas Castell as vice president of revenue operations and Mark Braatz as general manager and vice president of growth.

Amy Marks was promoted to global head of advertising sales marketing for Bloomberg Media.

Learfield named Fred Steck and Keith Bradshaw as vice presidents.

Exponential (formerly Tribal Fusion) has appointed Ittai Shiu as vice president, creative strategy.

Engine Group launched co/star, which matches brands with influencers and celebrities and also collaborates with them to develop high-quality branded content. co/star will be led by Sean Finnegan as managing director. Kevin Jonas assumes the role of managing partner. 

Viant hired Ryan McGurk as vice president of enterprise strategy.

TubeMogul hired Robert Gatto as chief operating officer.

J. Walcher Communications promoted Sandy Young from account supervisor to vice president.

Rauxa named Matt Agronin as director of operations based in the agency's New York office.

Emily Shiraki joined MBMG as digital media planner.