Answer:
One thing that Katherine Johnson and Genevieve Grotjan have in common is that they are both Mathematicians, the similarity in their line of work is shown in the following text.
Katherine Johnson played an important role in tracking trajectories for many NASA missions, she calculated and analyzed the flight paths of many spacecrafts during her more than three decades with the U.S. space program. Her work helped send astronauts to the Moon.
In September 1940, Genevieve Grotjan made a discovery that changed the course of history. She was the first one to find the key to breaking “Purple,” a breakthrough that enabled the SIS (US Army Signals Intelligence Service) to build an analog machine to decrypt Japanese diplomatic messages throughout WWII.
Genevieve Grotjan's contribution to the allied victory is incalculable, especially when taking into account the amount of lives that were saved, due to her efforts.
In conclusion, the work of Katherine Johnson and Genevieve Grotjan both played important roles in helping the United States achieve great things.