Obsidian Security Expands Leadership Team to Meet Growing SaaS Security Challenges in the Age of AI
Obsidian Security, a leading SaaS security platform trusted by global enterprises such as Snowflake, T-Mobile, and Pure Storage, has announced the expansion of its go-to-market leadership team with five strategic appointments. These hires position Obsidian to scale its operations effectively as it addresses the rapidly evolving security challenges posed by agentic AI and accelerates toward long-term growth and IPO readiness.
The new additions include Alison Tierney as VP of Go-to-Market (GTM) Strategy, Corey Elinburg as Field Chief Technology Officer, Brian McHenry as Vice President of Worldwide Solutions Engineering, Tina Lei as VP of Revenue Marketing, and Tyler Mihevc to lead Mid-Market expansion. These appointments build on Obsidian’s recent hire of Khanh Tran, former VP of Product Management at CrowdStrike, as Chief Product Officer (CPO), further solidifying an industry-leading executive team. This leadership expansion comes at a critical time when organizations worldwide are grappling with unprecedented SaaS security risks driven by AI-powered attacks, application sprawl, embedded co-pilots, and AI agents leveraging overly permissive OAuth tokens.
“We’re proud to welcome leaders who have chosen Obsidian because they share our mission and recognize the momentum we’ve built,” said Brian Murphy, Chief Revenue Officer of Obsidian Security. “Their confidence and expertise strengthen our ability to scale every part of our go-to-market engine—from engineering and sales to mid-market expansion and international strategy. As our customers face growing pressure to secure their SaaS environments while driving innovation, our success in meeting those demands depends on the strength of our team. This is a strategic inflection point, and we’re fully committed to increasing our market impact and driving long-term revenue growth.”
Addressing AI’s Double-Edged Impact on SaaS Security
While agentic AI offers significant productivity gains, it also introduces new security risks. Autonomous agents streamline workflows and enhance efficiency but expand the attack surface by leveraging the same integration mechanisms used in SaaS-to-SaaS integrations. AI-embedded SaaS tools and autonomous systems operating with excessive permissions via longstanding OAuth connections exacerbate the SaaS-to-SaaS integration blindspot.
Obsidian’s foundational Knowledge Graph provides a unique advantage in addressing this challenge. By unifying SaaS, endpoint, network, and identity data, Obsidian delivers contextual insights that reveal not only what AI agents are accessing but also how that access fits within the broader ecosystem of application relationships and user behaviors.
The platform’s deep visibility into application usage—enriched with workload context and in-app activity monitoring—enables Obsidian to detect subtle OAuth token anomalies that may signal malicious or compromised AI agents. This granular understanding of SaaS interconnections is essential for securing environments where autonomous agents have become key actors.
Building on this foundation, Obsidian is collaborating with Fortune 500 customers to develop enterprise-tested solutions that enable safe and rapid adoption of agentic AI technologies.
Leadership Team Brings Proven Scale Experience
Each member of the newly expanded leadership team brings extensive experience scaling high-growth technology companies:
- Alison Tierney, VP of GTM Strategy: Joining from Snowflake, where she served as SVP of Sales and VP of Global Sales Strategy, Tierney played a pivotal role in driving global expansion and scaling high-growth sales organizations. Her prior roles at AppDynamics and Oracle make her well-suited to lead Obsidian’s unified go-to-market strategies and spearhead international expansion.
- Corey Elinburg, Field Chief Technology Officer: With over 26 years of enterprise security leadership experience, Elinburg previously served as CISO at CommonSpirit Health, overseeing security and IT operations for more than 175,000 employees across 2,200+ care sites in 24 states. His expertise in securing large-scale, distributed organizations will be invaluable as Obsidian scales its solutions globally.
- Brian McHenry, VP of Worldwide Solutions Engineering: McHenry joins from F5, where he spent 16 years building and leading the global security practice for technical sales. He played key roles in major acquisitions, including the $1 billion acquisition of Shape Security and the $500 million acquisition of Volterra. His deep experience scaling security solutions positions him to lead Obsidian’s technical sales efforts worldwide.
- Tina Lei, VP of Revenue Marketing: Bringing extensive growth marketing expertise from NinjaOne, Lei advanced from Performance Marketing Specialist to VP of Growth over nearly seven years. She led digital marketing, website optimization, and product-led growth initiatives, managing multi-million-dollar budgets and building high-performing teams.
- Tyler Mihevc, Leader of Mid-Market Expansion: With proven sales leadership from high-growth companies like Craft.co (Worldwide VP of Sales) and PredictHQ (VP of Worldwide Sales and Customer Success), Mihevc strengthens Obsidian’s ability to serve mid-market organizations navigating AI-integrated business environments.
Scaling for Long-Term Growth
Founded by security leaders who previously redefined endpoint and identity security at CrowdStrike, Okta, Palo Alto Networks, and Cylance, Obsidian Security protects more than 200 organizations across North America, Europe, the Middle East, Southeast Asia, Australia, and New Zealand—including many of the world’s largest Fortune 1000 and Global 2000 companies.
The company secures business-critical SaaS applications such as Microsoft 365, Salesforce, and hundreds of other enterprise tools that drive modern work. Obsidian operates data centers in the US, Europe, the Middle East, and Australia to ensure robust protection for its global customer base. Its modular approach to SaaS security allows it to meet the needs of both large and small enterprises.
“AI is changing the threat landscape faster than most organizations can respond,” said Hasan Imam, CEO of Obsidian Security. “This moment demands leadership that understands both the scale of the challenge and the urgency of the opportunity. We’re building a team that’s done this before—so we can stay ahead of emerging threats and deliver on the promise of safe, scalable AI adoption.”
A Strategic Inflection Point for SaaS Security
As AI continues to reshape the digital landscape, the demand for comprehensive SaaS security solutions has never been greater. Obsidian’s expanded leadership team reflects the company’s commitment to addressing these challenges head-on while positioning itself for sustained growth. By combining cutting-edge technology with a seasoned executive bench, Obsidian is poised to lead the charge in securing the future of work in an AI-driven world.
With its innovative Knowledge Graph and modular SaaS security platform, Obsidian is uniquely equipped to tackle the complexities of modern SaaS environments. The company’s focus on scalability, international expansion, and mid-market growth ensures that it can meet the diverse needs of organizations worldwide. As the threat landscape evolves, Obsidian’s leadership is committed to staying ahead of emerging risks and empowering businesses to adopt AI technologies safely and confidently.
About Obsidian Security
Obsidian Security is the leading SaaS security platform, trusted by global enterprises like Snowflake, T-Mobile, and Pure Storage. We protect over 200 global organizations, including many of the world’s largest Fortune 1000 and Global 2000 companies with data center availability in North America, EMEA, and APAC. Backed by top investors like Greylock, we’re closing a critical gap: securing the SaaS apps where business happens like Microsoft 365, Salesforce, and hundreds more. Our platform reduces risk, detects and responds to threats, and prevents breaches at the source. Obsidian was built by leaders who redefined endpoint and identity security at CrowdStrike, Okta, Cylance, and Carbon Black. Now, we’re tackling the next frontier: securing SaaS in the era of agentic AI. As AI tools gain access to sensitive data through integrations, Obsidian uniquely detects human and non-human identity compromise and manages integration risk.
