SquareX, a Palo Alto-based leader in browser security, announced the appointment of Steve Mullett as Vice President of Sales, effective immediately. With over 17 years of experience in SaaS and cybersecurity, Mullett brings a proven track record of driving revenue growth at high-growth companies like Wiz and Okta. His role will focus on leading SquareX’s enterprise sales strategy and go-to-market operations, accelerating customer acquisition in the rapidly evolving browser security landscape.
Steve Mullett named VP of Sales at SquareX on July 24, 2025.
Brings 17+ years of experience from Wiz, Okta, and EMC.
Led sales at Wiz during its rise to $10B valuation.
Managed Okta’s enterprise sales during IPO, reaching $1B revenue.
SquareX’s BDR solution secures browsers against client-side attacks.
Focus on customer acquisition and market expansion in browser security.
Mullett’s career is marked by consistent success in high-growth environments. Most recently, he served as Strategic Account Executive at Wiz, the fastest-growing SaaS company to reach a $10 billion valuation, where he spent four years building strategic relationships with Fortune 500 clients. Prior to that, he was Regional Sales Manager for Large Enterprises at Okta for nearly five years, contributing to its revenue growth from pre-IPO to over $1 billion annually. “Steve’s outstanding track record of exceeding targets and building strategic relationships with enterprise clients makes him an ideal leader to accelerate SquareX’s enterprise growth,” said Vivek Ramachandran, Founder and CEO of SquareX.
The browser has become a critical attack surface for enterprises, with threats like malicious extensions, spearphishing, and browser-native ransomware on the rise. SquareX’s industry-first Browser Detection and Response (BDR) solution integrates seamlessly with consumer browsers like Chrome, Edge, Firefox, and Safari, transforming them into enterprise-grade secure browsers. “The browser has become the new attack surface for enterprises, and SquareX’s innovative approach to browser security addresses a critical gap in the market that every security leader is struggling with,” said Mullett. This approach ensures robust protection against client-side web attacks without compromising user experience or productivity.
As VP of Sales, Mullett will spearhead SquareX’s enterprise sales strategy, focusing on boosting customer acquisition and expanding market reach. His deep understanding of cybersecurity challenges, combined with experience at high-growth companies, positions him to drive SquareX’s growth in the browser security sector. The company’s recent $20 million Series A funding round, led by SYN Ventures and Peak XV Partners, further supports its expansion plans. Mullett’s appointment follows the addition of David Smith as Chief Revenue Officer in December 2024, signaling SquareX’s commitment to scaling its innovative solutions globally.
SquareX’s BDR solution empowers organizations to proactively detect, mitigate, and threat-hunt client-side attacks, including advanced spearphishing and GenAI data loss prevention. Unlike legacy security tools or cumbersome enterprise browsers, SquareX prioritizes seamless integration and user experience, addressing the growing sophistication of browser-based threats. Mullett’s leadership is expected to strengthen SquareX’s position in the cybersecurity market, enabling enterprises to secure their browser environments effectively while maintaining operational efficiency.
SquareX’s appointment of Steve Mullett as VP of Sales marks a pivotal step in its mission to redefine browser security. With his expertise and SquareX’s innovative BDR platform, the company is well-positioned to address the evolving needs of enterprises and solidify its leadership in the cybersecurity industry.
SquareX's browser extension transforms any browser on any device into an enterprise-grade secure browser. SquareX's industry-first Browser Detection and Response (BDR) solution empowers organizations to proactively detect, mitigate, and threat-hunt client-side web attacks including malicious browser extensions, advanced spearphishing, browser-native ransomware, GenAI data loss prevention, and more.
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