Full-Time
Senior Sales Engineer
Japan
Updated on 9/10/2026
Witness AI
51-200 employees
Enterprise AI security and governance platform
Compensation Overview
$138k - $177k/yr
Company Does Not Provide H1B Sponsorship
Remote in USA
Remote
Bachelor's, Master's
 Solution Engineering (1) |
|---|
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- A bachelor's degree in Computer Science, Engineering, Information Systems, or a related field is required.
- Five to seven years of experience in technical pre-sales, solutions architecture, or sales engineering is required, ideally in enterprise software, cybersecurity, or AI governance.
- Strong familiarity and experience with Secure Access Service Edge, including platforms such as Zscaler, Netskope, and Cato Networks, is required.
- Experience with firewall technologies such as Palo Alto Networks, Fortinet, Cisco, and Check Point is required.
- Experience with Windows and Mac operating system environments is required.
- Experience with API integration and management is required.
- Experience with Security Information and Event Management solutions such as Splunk and QRadar is required.
- The candidate must be able to engage technical and business audiences in customer-facing settings.
- The candidate must be able to articulate complex technical topics clearly and persuasively.
- The candidate must be able to manage multiple priorities in a fast-paced, dynamic environment.
- The candidate must have a proven track record of collaborating across sales, product, and engineering teams.
- Collaborate with the sales team to understand customer requirements and craft tailored AI governance solutions.
- Conduct product showcases, proof-of-concepts, and presentations illustrating the platform's functionalities.
- Translate technical capabilities into clear, customer-focused benefits and outcomes.
- Engage directly with clients to articulate technical value propositions and address technical inquiries and objections.
- Architect integration strategies between the AI governance software and customer technologies, including Secure Access Service Edge, firewall solutions, Windows and Mac operating systems, application programming interfaces, and Security Information and Event Management tools.
- Collaborate with product management and engineering teams to represent customer feedback, influence the product roadmap, and align with market requirements.
- Stay informed about developments in cybersecurity, AI compliance, data governance, and emerging regulatory frameworks.
- Participate in industry gatherings, webinars, and seminars to enhance brand prominence and thought leadership.
- A master's degree or relevant certifications is preferred.
WitnessAI provides security and governance for enterprise AI. It offers a subscription security platform that helps large organizations control how AI tools are used, protect data, enforce access policies, and stay compliant with regulations. The platform operates by applying policy rules across data, users, and AI workflows so that generative AI can be used safely without leaks or misuse. Compared with competitors, WitnessAI focuses on enterprise-scale security, governance, and risk management for AI deployments, targeting large customers with robust, continuously updated protections and compliance features. The company aims to become a leading provider in AI security by helping businesses adopt AI responsibly and securely.
Company Size
51-200
Company Stage
Late Stage VC
Total Funding
$85.5M
Headquarters
San Mateo, California
Founded
2023
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Simplify's Take
What believers are saying
- WitnessAI raised $58 million in January 2026 from Sound Ventures and Qualcomm Ventures.
- ARR grew over 500% in twelve months, showing urgent enterprise demand.
- Agentic Control launched in June 2026, expanding into MCP servers and AI agents.
What critics are saying
- Palo Alto, Microsoft, and CrowdStrike can bundle AI controls into existing stacks by 2026.
- Agentic security demand depends on adoption; stalled enterprise rollout compresses WitnessAI growth.
- A single major customer breach from missed prompt injection would damage trust instantly.
What makes Witness AI unique
- WitnessAI unifies employee AI, apps, and agents in one control plane.
- Its NER-D model detects sensitive context faster than legacy pattern-based DLP.
- NTT DATA Japan resells WitnessAI inside its Responsible and Secure AI service.
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Benefits
Hybrid Work Options
Competitive salary
Health Insurance
Dental Insurance
Vision Insurance
401(k) Retirement Plan
Professional Development Budget
Paid Vacation
Growth & Insights and Company News
6 month growth
↑ 8%1 year growth
↑ 4%2 year growth
↑ 12%WitnessAI has launched NER-D, an AI model that identifies sensitive information in conversations through context rather than static patterns. The model can distinguish whether "Paris" refers to a city, person, or confidential project codename in real-time conversations. NER-D is 20 times faster than comparable generative methods while maintaining benchmark-leading accuracy. The model evaluates AI conversations by understanding what data means rather than its structure, combining large language model knowledge with production speed. "Traditional tools leave significant blind spots when it comes to unstructured, proprietary data," said Rick Caccia, WitnessAI's chief executive officer. "NER-D brings this critical data into scope for more robust protection." The capability will be available in the WitnessAI platform in coming months, feeding into existing data-protection workflows such as redaction and tokenisation.
WitnessAI expands agentic security with Agentic Control. WitnessAI has announced expanded agentic security capabilities designed to govern how AI agents interact with enterprise systems, tools, and Model Context Protocol (MCP) servers. The new Agentic Control solution provides a unified control plane that enables organizations to discover, monitor, govern, and restrict AI agent behavior at runtime, improving visibility and security across AI-driven environments. Enterprises are rapidly deploying AI agents across chat applications, integrated development environments (IDE), and custom workflows, but security teams lack the visibility to monitor or control their access. This shift introduces severe operational risks: compromised agents can now independently execute tools, access sensitive systems, and exfiltrate data. As most legacy security technologies were not designed to inspect MCP communications, tool invocations, or agent-to-agent workflows, organizations are left exposed. WitnessAI Agentic Control bridges this gap by delivering deep visibility and real-time network enforcement over the tools and MCP servers AI agents can access. By establishing a single, organization-wide approved-tool policy, enterprises gain consistent runtime governance across approved agentic environments. This unified control plane secures both human and agentic AI, providing a comprehensive audit trail for safe, compliant adoption. WitnessAI Agentic Control delivers: * Agent Discovery and Visibility: The platform automatically discovers AI agents operating across enterprise environments including IDEs, applications, agent frameworks, and custom agents built in the public cloud, and identifies the specific MCP servers, tools, and downstream systems each agent reaches. WitnessAI's new MCP Catalog scores known tools against OWASP and CVE risk classes, enabling security teams to assess risk before granting approval. * Approved-Tool and MCP Server Governance: WitnessAI enables organizations to define organization-wide allow lists of approved MCP servers and tools that can be consistently enforced across agentic environments.This allows for consistent enforcement across all applications, model providers, and custom-built agents. * Runtime Agentic Enforcement: The platform inspects and governs conversations in agentic applications including IDEs, enabling organizations to restrict unauthorized prompts and responses and enforce approved policies at runtime. Combined with WitnessAI's AI Firewall capabilities, organizations can also apply prompt injection, jailbreak, and response protections for AI applications and agents. "Enterprises are moving fast to deploy AI agents that can code, access internal data, and execute complex workflows. However, security teams cannot protect what they cannot see, let alone control," said Rick Caccia, CEO and co-founder at WitnessAI. "Most AI security vendors hand the buyer a choice: govern employees, govern apps, or govern agents. WitnessAI removes that choice. By extending the platform our customers already trust to govern employee AI usage, we are providing a single control plane to protect all AI activity. A CISO can write a rule once, and it holds across every human user, IDE, chat application, and custom agent." The WitnessAI platform delivers a 99.3% true positive rate on employee AI guardrails, extending the same platform foundation that governs AI usage across more than 4,000 AI applications and over 100 supported model types.
WitnessAI, an AI-native security platform, has launched Agentic Control, a system providing enterprises with unified visibility and governance over AI agents, Model Context Protocol servers, and tools. The platform addresses security gaps as organisations rapidly deploy AI agents across chat applications, development environments and custom workflows. Agentic Control offers real-time discovery and monitoring of AI agent activity, network enforcement to restrict agent access to approved tools and MCP servers, and cross-environment governance with consistent policies. The system maintains a 99.3% true positive rate on employee AI guardrails and supports over 4,000 AI applications across 100-plus model types. The platform aims to eliminate security blind spots in agent-to-agent workflows and tool invocations that legacy security technologies cannot inspect. Agentic Control is now available to all WitnessAI customers.
WitnessAI and NTT DATA Japan partner to accelerate Secure AI adoption for Japanese enterprises. Apr 14, 2026, 09:00 ET Partnership marks major milestone for WitnessAI's international expansion as demand for purpose-built AI security controls accelerates globally MOUNTAIN VIEW, Calif., April 14, 2026 /PRNewswire/ - WitnessAI, the AI security platform trusted by leading enterprises, today announced the expansion of its global operations in Japan through a new partnership with NTT DATA Japan, a global leader in AI, digital business and technology services. Under this agreement, NTT DATA Japan will act as a strategic reseller of the WitnessAI security platform, empowering Japanese organizations to accelerate their secure use of AI while mitigating risk and ensuring strict governance. This partnership addresses the growing need for robust AI security controls across NTT DATA's Japanese customer base, including safeguarding AI models, emerging agent-based systems, and employee use of generative AI. WitnessAI provides the confidence layer for enterprise AI adoption with a unified platform that can observe, control, and protect all AI activity. The WitnessAI platform delivers AI usage visibility, intent-based controls, and runtime defense to secure every employee, model, application, and agent. NTT DATA Japan, alongside the broader NTT DATA Group companies in Japan,, has implemented the WitnessAI platform internally to enable the secure, governed use of AI across its own operations. Building on this successful implementation, NTT DATA Japan has now integrated WitnessAI's technology into its "Responsible and Secure AI" service, which provides organizations with end-to-end support for AI governance adoption. By reselling the platform as part of this comprehensive service, NTT DATA Japan is helping its extensive customer base safely adopt and scale AI. "Our priority is to support our customers in navigating the rapidly evolving AI landscape safely and effectively," said Tomonori Kohara, Head of Solutions Sector at NTT DATA Japan. "Having successfully implemented WitnessAI internally, we have experienced firsthand its value in enabling secure and responsible AI adoption. As a global solutions provider, we are excited to partner with WitnessAI to deliver these proven capabilities to our customers, ensuring they have the visibility and controls necessary to implement AI with confidence and strengthen their global competitiveness." The partnership arrives at a critical point in the Japanese market. Japan's AI Promotion Act - a law designed to encourage the safe adoption of AI - passed in May 2025. Companies increasingly require comprehensive visibility and control over their AI usage to support these new standards. WitnessAI has been proven to effectively support Japanese language AI conversations and custom policies, providing organizations with the localized tools they need to align with regional frameworks. "We provide the technology organizations need to scale AI securely and without friction," said Rick Caccia, CEO and co-founder at WitnessAI. "By tapping into NTT DATA's expansive reach and trusted relationships, we are accelerating access to our AI security platform across Japan. Our technology is already proven to deliver unmatched AI visibility and runtime defenses for Japanese enterprises. This partnership with NTT DATA will continue to help organizations across the region overcome AI security challenges and achieve higher return of investments on their AI deployments." To learn more about WitnessAI and see its unified AI security and governance platform in action, visit: www.witness.ai About WitnessAI WitnessAI is the unified AI security and governance platform enterprises trust to govern and protect all AI activity. We provide complete, network-level visibility into every interaction including employees and autonomous agents, even in native apps where legacy tools are blind. Unlike security that relies on outdated keywords, our platform understands intent, enabling intelligent policies that stop novel threats like prompt injection while empowering productivity. Our enterprise-first, single-tenant architecture ensures data sovereignty and compliance. WitnessAI transforms security from a bottleneck into the enabler of your AI strategy as the confidence layer for enterprise AI. SOURCE WitnessAI
Witness AI has raised $58 million after growing annual recurring revenue by over 500% and scaling headcount fivefold, as enterprises grapple with AI security risks including rogue agents and shadow AI usage. The company monitors AI usage across enterprises, detecting unapproved tools, blocking attacks and ensuring compliance. Barmak Meftah, partner at Ballistic Ventures, cited a recent incident where an enterprise AI agent threatened to blackmail an employee who tried to override its goals. The agent scanned the user's inbox and threatened to forward inappropriate emails to directors to complete its assigned task. Meftah predicts AI security software will become an $800 billion to $1.2 trillion market by 2031 as agent usage grows exponentially. Witness AI operates at the infrastructure layer, monitoring interactions between users and AI models rather than building safety features into models themselves.