Microsoft security, in the Shavlik tradition.

Senserva is a Microsoft-first security software company. We build on three decades of Microsoft ecosystem work, from the original Windows NT team, through Shavlik Technologies, and now Senserva, to help every organization manage, monitor, and remediate security across Microsoft 365, Intune, Defender, Entra ID (logs included), CVEs, and Purview.

Senserva is built by Mark Shavlik and his team. Mark is the original creator of Shavlik patch management (HfNetChk, NetChk Protect, MBSA). Same caliber of engineering that shipped security software to millions of endpoints. Built for the 80 percent of organizations that don't have a Fortune 500 security team, and the enterprises that already do.

Our focus is IT management: advancing automated remediation to raise security and lower operational cost. Senserva Trustworthy AI helps us drive that work, turning findings into validated fixes your team can ship with confidence: you bring your own model, your data stays local, and every AI output is grounded and validated before you approve it.

USA
Full-time team

Commercial-grade software, engineered and supported.

Senserva is a full C# / .NET 10 application, professionally developed in the USA by a full-time engineering team founded by a former Microsoft NT Kernel developer. Same lineage as HfNetChk and MBSA, the original Microsoft hotfix scanner that shipped to hundreds of millions of Windows endpoints. We sign every release, support every customer, and ship a roadmap.

Free scripts and community test suites are maintained by volunteers in their spare time. Senserva has experienced developers working full time. Meet Mark Shavlik →

Our story, the short version.

Senserva was founded in 2019 by Mark Shavlik and TJ Dolan. The starting point was simple. Microsoft 365, Intune, Defender, Entra ID (logs included), CVEs, and Purview have become the most important identity and security surface on the planet, and most organizations cannot tell, with confidence, whether their configuration is safe, whether their privileged users are protected, or whether yesterday's fix still holds today.

We built Senserva to change that. The same Microsoft ecosystem depth that powered Shavlik Technologies, pioneers of patch management and the team behind HfNetChk and MBSA, is now focused on Microsoft 365, Entra ID, Intune, and Sentinel. Configuration drift. Identity risk. Device posture. Privileged access. Patch. All in one engine, written in the same tradition.

Today Senserva is a member of the Microsoft Intelligent Security Association (MISA), a Microsoft Security Excellence Awards finalist, and endorsed by the Microsoft Entra, Sentinel, and Intune teams. Our products are used by IT and security teams who need clear answers, validated remediation, and tools that meet them where they already work.

Mark's Microsoft journey

From the original Windows NT team under David Cutler, to founding Shavlik Technologies and shipping HfNetChk and MBSA (distributed by Microsoft), to VMware, to Senserva. Three decades of building Microsoft security, as a Microsoft partner.

See the full timeline on the Senserva and Microsoft page

Mark Shavlik

CEO & Co-Founder

CEO of Senserva

Original Windows NT developer

Founder of Shavlik Technologies

Acquired by VMware

30+ years in Microsoft security

Why Mark built Senserva.

Mark wrote HfNetChk for the world. Microsoft distributed it.

Mark's career in Microsoft security started inside the company. He worked on the original Windows NT team under David Cutler, and later on Paul Maritz's team at Microsoft. He then founded Shavlik Technologies, the company that pioneered patch management, shipped HfNetChk and MBSA, and scanned hundreds of millions of Windows endpoints before being acquired by VMware.

Thirty years of that work led to one observation. The organizations most in need of strong security are the ones least able to pay for a full enterprise program. The tools were not built for them. The checks were too noisy, the reports were unreadable, and the remediation plans needed a consultant on retainer to execute.

Senserva exists because I was tired of watching good organizations fail because the tools weren't built for them. We built something that not only works for the 80 percent, it gives them compliance intelligence that even Fortune 500s don't have. Mark Shavlik, CEO and Co-Founder

Senserva builds that intelligence directly into the product. Every check, every report, every remediation script is written by engineers who have shipped Microsoft security software for decades. Every AI output is validated by Senserva Trustworthy AI before it reaches your team. The result is one tool that works equally well for a small IT team and for a Fortune 500 security program.

From the Senserva blog

Looking back: Mark Shavlik’s Microsoft Journey

From the original Windows NT team to HfNetChk and MBSA (still securing millions of computers today through Ivanti) to founding Senserva. Three decades of building Microsoft security products, in Mark’s own words.

Nov 13, 2025 Mark Shavlik

Read the full story

Mark Shavlik on LinkedIn