
Work Here?
Onebrief provides a cloud-based planning tool tailored for defense organizations. It converts complex operational plans into reusable, real-time cards that organize information into a collaborative, update-friendly workspace. The product helps commanders, staff officers, NCOs, and defense partners react quickly to changes, speeding up decision cycles and reducing time spent on preparing slides and planning documents. Unlike traditional planning tools, Onebrief emphasizes a card-based, real-time, multi-user workflow designed for fast, synchronized planning across teams. The company operates on a software-as-a-service model with subscription revenue and is backed by Y Combinator, which signals support from a well-known startup ecosystem. Onebrief’s goal is to streamline military planning processes, improve collaboration, and deliver faster, more coordinated decisions for defense missions.
Industries
Data & Analytics
Government & Public Sector
Enterprise Software
Defense
Company Size
201-500
Company Stage
Series D
Total Funding
$362.2M
Headquarters
Honolulu, Hawaii
Founded
2019
People at Onebrief who can refer or advise you
Help us improve and share your feedback! Did you find this helpful?
Total Funding
$362.2M
Above
Industry Average
Funded Over
8 Rounds
Industry standards
Onebrief expands leadership team with techveteran Cory Ondrejka. February 6, 2026 HONOLULU (Feb. 3) - Onebrief, the operating system for modern command, today announced that it has hired Cory Ondrejka as Chief Technology Officer (CTO). Ondrejka brings to Onebrief more than 30 years of experience inventing and delivering new technologies while leading large engineering teams, including at Google and Meta. As CTO, Ondrejka will lead Onebrief's engineering organization. He will lead the expansion of Onebrief's artificial intelligence-driven support capabilities and integrate advanced wargaming, modeling, and simulation tools through Onebrief's acquisition of Battle Road Digital. This will bring together operational planning, wargaming, and simulation within the Onebrief platform, creating a single, unified environment for military command. He will focus on making these tools intuitive and seamless, enabling teams to plan, test, and adapt at superhuman speeds. "Over the last three decades, Cory has been involved in some of the most important shifts in modern technology," said Onebrief CEO Grant Demaree. "He understands how to turn new ideas into trusted systems. Cory has already been deeply involved in its work strengthening Onebrief's AI Assist capabilities and integrating Battle Road Digital's best-in-class simulation technologies into its platform. His leadership is critical to its efforts to strengthen and scale this platform. He is the right person to lead its technology. "Joining Onebrief feels like a homecoming," said Ondrejka, a graduate of the United States Naval Academy. "The team is solving real problems for military planners, by incorporating AI into a platform that unites planning and wargaming in one unified system. As we integrate Battle Road into the platform, I'm looking forward to continuing the work of building technology that our nation's military leaders can trust when it matters most." Ondrejka has held senior leadership roles across both early-stage companies and some of the world's largest technology organizations. As vice president of Google Experience, Ondrejka served as Google CEO Sundar Pichai's technical strategy advisor and led engineering teams of more than 1,500 people. His responsibilities included improving core consumer technologies and helping teams apply AI across widely used products. Ondrejka also served as vice president of Mobile Engineering at Meta during the pivotal period when Facebook was shifting from a desktop-focused product to a mobile-first platform. As a leader at Meta during this transformation, he created the technology and product experience that enabled Meta to experience explosive growth both before and after its IPO in 2012. Previously, Ondrejka served as CTO of SmartNews, where he led global engineering teams and drove the adoption of artificial intelligence and large language model technologies to improve content discovery, ranking, and system reliability at scale. Earlier, he was the co-creator and CTO of Second Life, the pioneering virtual world developed at Linden Lab and named one of Time magazine's "Best Inventions" of 2002, which helped shape early thinking around shared digital spaces and online communities.
Find jobs on Simplify and start your career today
Industries
Data & Analytics
Government & Public Sector
Enterprise Software
Defense
Company Size
201-500
Company Stage
Series D
Total Funding
$362.2M
Headquarters
Honolulu, Hawaii
Founded
2019
Find jobs on Simplify and start your career today