After graduation, Ross applied to
NeXT,
Apple, and
Microsoft; NeXT and Apple did not respond to Ross' resume, while Microsoft did. At Microsoft, she tired of the dry, technical writing her job required. Initially looking at taking a break from Microsoft for a year to work on something creative, she secured a position as a producer on a basketball game on the basis of her sports and technology background. She credited the variety of games as encouraging her to stay at Microsoft rather than moving to another company.
343 Industries By 2005, Ross was a general manager for
Microsoft Game Studios (now Xbox Game Studios). Ross' vision for
Halo also impressed art director
Kiki Wolfkill, who joined the team as a studio head. 343 Industries has also collaborated with other studios to produce
Halo games, such as
Halo: Combat Evolved Anniversary,
Halo: Spartan Assault, and
Halo Wars 2. 343 Industries would ultimately hire from more than 55 different companies to work on their first major game,
Halo 4. Midway through development, 343 changed the vision of the project significantly, leading to the departure of the game's creative director and
Josh Holmes as a replacement. The developers created a
vertical slice of gameplay that was very similar to a Bungie-style
Halo game, and then used that to inform a different direction for the game. In 2014, 343 Industries released
Halo: The Master Chief Collection, a compilation of the four main
Halo games for the Xbox One. On launch, the game suffered from severe issues, and Ross issued public apologies for the state of the product; she later called it the worst moment in her career.
Halo 5: Guardians released in 2015, and sales of the games and related merchandise topped $400 million in its first week. Lessons learned from the development of
Halo 5 led to a longer development period for the next game,
Halo Infinite, released in 2021. Ross also envisioned the
Halo franchise growing with transmedia content such as books and television. Ross announced her departure from 343 Industries on September 12, 2022. She became a board member at
Duolingo in December 2024. == Diversity efforts ==