Tanium leadership – Cybersecurity startup Tanium, valued at $9 billion, has reshuffled leadership after losing five top executives. The Seattle-area company, which has stayed private since 2007 and has spent years weighing whether to pursue an IPO, is now cycling into new legal,
For a company that has waited years to get to the market, the pattern is getting harder to ignore.
Tanium, the Seattle-area cybersecurity startup valued at $9 billion, has undergone a leadership reshuffle after losing five top executives. The departures deepen a sense of uncertainty around whether the company’s long-running IPO plans—helped along by formal internal work—ever move from “readiness” to reality.
Founded in 2007 and still private. Tanium has raised nearly $1 billion. according to PitchBook. and counts investors including Andreessen Horowitz. TPG. and Salesforce Ventures. In 2021, the company hired its chief financial officer, Marc Levine, to conduct a “readiness assessment” for an initial public offering. Over the past few years. multiple employees and executives have left as questions persisted about whether Tanium would ever go public.
This latest wave came with the exit of three senior leaders in May: Tanium’s chief legal officer Brady Mickelsen. its chief people officer Tobias Julén. and its chief information security officer Chris Hallenbeck. all listed on their LinkedIn profiles as having left in May. Mickelsen now has the same role at DigitalOcean. Julén is now chief human resources officer at StillFront. Tanium’s chief marketing officer Tara Ryan also no longer appears on the company website. She and Mickelsen were listed on the site in early June, based on the Wayback Machine.
Ryan did not respond to a request for comment.
The change didn’t stop at departures.
Tanium also brought on a new chief people officer, Carol MacKinlay, who was hired in April and has since resigned. MacKinlay said she resigned due to a sudden issue with her family.
“I feel sorry that I left them in a lurch, but family has to come first. Great company with a great trajectory, and I wish them the best,” she said.
Since her resignation, Russ Evans has been promoted to chief legal officer. Shannon Rosales Mirani is the interim chief people officer. Paul Black joined as chief information security officer in May. The Tanium website does not list a chief marketing officer.
Another senior change came in May as well, when Tanium promoted Ben Stein—previously senior vice president of global operations—to chief strategy officer.
“Like all responsible companies. Tanium continues to adapt our approach. as well as our team. to best serve our customers and partners. ” a Tanium spokesperson said. “We will continue to evolve to meet the needs of our constituents — and best serve them at a time when they need us most. We are confident in our experienced team at the helm. our momentum. and our ability to continue driving innovation and value for our customers and partners.”.
The departures land on a company already known for pushing major decisions through corporate pressure points. Last year, Tanium cracked down on its return-to-office policy in an unusual way by withholding some equity grants from employees who don’t comply.
Now, with several senior leaders gone and new executives cycling into key legal, people, and strategy roles, Tanium faces fresh questions about its next chapter—questions that are difficult to separate from the long shadow of its IPO readiness work and its long wait as a private company.
Tanium cybersecurity startup IPO readiness leadership reshuffle chief legal officer chief people officer chief information security officer Marc Levine Brady Mickelsen Tobias Julén Chris Hallenbeck DigitalOcean StillFront Carol MacKinlay Russ Evans Shannon Rosales Mirani Paul Black Ben Stein Andreessen Horowitz TPG Salesforce Ventures