Former Billiken Constantin Heider was named the Billikens' Director of Operations in 2020. 

A native of Niederbrechen, Germany, Heider is responsible for many aspects of the operations of the men's soccer program including travel, gear, facilities and social media. 

Heider appeared in 26 matches (18 starts) during his playing career that was cut short due to injury. As a freshman in 2016, he scored a goal against VCU on Homecoming that helped secure a draw against the Rams. Later in the season in a win against St. Bonaventure, he scored a goal and added an assist. Heider helped the Billikens capture the A-10 regular season title in 2016.

Before arriving in St. Louis, Heider played for RB Leipzig in Germany and helped his club win U17 and U19 Bundesliga Nord/Nordost championships.

Heider earned a bachelor's degree in Marketing from SLU in 2020, as well as a master's in Supply Chain Management in 2022.