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Full-time
Posted 47d ago
~40 hrs/week
Responsibilities
Research and author patch metadata for third-party Windows applications to maintain a comprehensive patch catalog. Validate silent installation parameters and registry-based detection logic to ensure accurate software deployment.
Requirements
Requires 4-5 years of experience in Windows systems administration, patch management, or software packaging. Must have deep knowledge of Windows OS internals and various installer technologies like MSI and NSIS.
Full job description
Come work at a place where innovation and teamwork come together to support the most exciting missions in the world!
About the Role
Qualys is looking for a detail-oriented Windows Patch Management Catalog Researcher to join the Patch Management product team. In this role, you will be responsible for building and maintaining a comprehensive, accurate patch catalog covering a wide range of third-party Windows software.
Key Responsibilities
Patch Catalog Research & Authoring
Research, author, and maintain patch metadata for third-party Windows applications across a broad software catalog.
Identify new software releases, security updates, and version changes from vendor sources, changelogs, and security advisories (CVE/NVD).
Map vendor releases to structured metadata schemas, including version strings, download URLs, detection logic, and installation parameters.
Track software End-of-Life (EOL) dates and update catalog entries accordingly.
Windows Patching & Installation Knowledge
Document and validate silent installation parameters for diverse installer types (MSI, NSIS EXE, InnoSetup, WiX, etc.).
Research and verify correct msiexec.exe flags, NSIS /S switches, and equivalent silent/unattended arguments per software.
Determine accurate reboot behavior (Yes / No / Maybe) per installer type and document exit codes (success, reboot-required).
Manually test patch installation in sandbox environments and verify detection logic post-install.
Detection Logic & Registry Research
Research and validate Windows registry keys used to detect installed software versions (Uninstall hive, vendor-specific keys, DisplayVersion, etc.).
Identify and document file-based detection paths (FileVersion, ProductVersion attributes on key executables).
Understand the difference between 32-bit and 64-bit registry views (WOW6432Node) and apply correct detection architecture per installer variant.
Validate detection logic against fresh installs and upgrades across supported Windows versions.
Backend Patch Tool Understanding
Understand how enterprise patch management platforms (e.g., Qualys Patch Management, SCCM, Ivanti, Adaptiva) discover, deploy, and verify patches.
Familiarity with how catalogs are consumed by patch engines — detection-before-install logic, supersedence evaluation, and deployment policy enforcement.
Required Skills & Qualifications
4-5 years of experience in Windows systems administration, patch management, or software packaging.
Strong understanding of Windows OS internals — registry structure, file system, user vs. system installation scopes, environment variables, and PATH management.
Hands-on experience with Windows patching tools (WSUS, SCCM/ConfigMgr, Ivanti, Qualys, Chocolatey, or equivalent).
Experience with manual patch installation — running MSI/EXE installers, using msiexec.exe with switches, repackaging software.
Solid understanding of installer technologies: MSI/WiX, NSIS, InnoSetup, Squirrel, and their silent install mechanisms.
Familiarity with the Windows registry and the ability to trace installation artifacts to their registry keys.
Nice to Have
Experience building or maintaining a software patch catalog (Adaptiva, Chocolatey, ManageEngine, or similar).
Experience with Windows Installer (MSI) internals — product codes, upgrade codes, component tables.
Knowledge of ARM64 Windows platform nuances and multi-architecture software distribution.
Good understanding of Windows Update infrastructure (WUA, WSUS, CBS/SFC).
Scripting experience in Python or PowerShell.
Related keywords
Windows Patch ManagementPatch CatalogCVENVDMSINSISInnoSetupWiXmsiexec.exeWOW6432NodeSCCMIvantiAdaptivaChocolateyWSUSPython
Security and compliance for your global IT assets.
Industry
Computer and Network Security
Company size
1,001-5,000 employees
Founded
1999
Headquarters
Foster City, CA
LinkedIn followers
291,750
Total funding
$34M
Qualys, Inc. (NASDAQ: QLYS) is a leading provider of disruptive cloud-based security, compliance and IT solutions with more than 10,000 subscription customers worldwide, including a majority of the Forbes Global 100 and Fortune 100. Qualys helps organizations streamline and automate their security and compliance solutions onto a single platform for greater agility, better business outcomes, and substantial cost savings.
The Qualys Enterprise TruRisk Platform leverages a single agent to continuously deliver critical security intelligence while enabling enterprises to automate the full spectrum of vulnerability detection, compliance, and protection for IT systems, workloads and web applications across on premises, endpoints, servers, public and private clouds, containers, and mobile devices.
Founded in 1999 as one of the first SaaS security companies, Qualys has strategic partnerships and seamlessly integrates its vulnerability management capabilities into security offerings from cloud service providers, including Amazon Web Services, the Google Cloud Platform and Microsoft Azure, along with a number of leading managed service providers and global consulting organizations. For more information, please visit http://www.qualys.com.
Offices: 919 E Hillsdale Blvd, Foster City, CA 94404, US · Survey No. 20, 10th to 16th Floor, Tower B Panchshil Business Park,, Pune, Pune 411005, IN · 39/2 Park St, Sydney, New South Wales 2000, AU · 7 Pl. de la Défense, Courbevoie, 92400, FR · München Flughafen, Terminalstraße Mitte 18, München, 85356 , DE
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