Kurt Mandl was a Human terraformer who worked for the Federation Terraform Command in the 2360s.
In 2364, Mandl's work on Velara III was halted after a sentient lifeform dubbed the "microbrain" was discovered on the planet. (TNG episode: "Home Soil")
In 2376, Pascal Saadya consulted with a hologram of Mandl. (SCE eBook: Ishtar Rising)