Senior Zero Trust Windows Security Engineer (Passwordless)

Cisco Systems, Inc.; Ann Arbor (MI); On-site; USD 139,000 - 204,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

401(k) with company match

Paid parental leave

Disability coverage

Life insurance

Paid time off

Job summary

Cisco Systems, Inc. - Cisco Duo Zero Trust OS Logon & Enterprise Applications team seeks a seasoned systems software engineer to design and implement high‑performance authentication components for Windows and macOS.

You will work on custom Credential Providers, ADFS adapters, and passwordless logon technologies, collaborating with product, security, and design to ensure zero‑regression releases and scalable tooling.

Qualifications

• Bachelor's degree or equivalent practical experience in a technical field.
• 6+ years of professional systems software engineering with Modern C++ or C.
• Experience building native Windows desktop/server apps using Win32 APIs, multithreading, IPC.
• Experience with on-prem Active Directory, Kerberos, or Windows Server environments.
• Experience authoring PowerShell scripts or using WMI/CIM for automation.

Responsibilities

• Design and implement high-performance, memory-safe endpoint authentication components and integrations on Windows.
• Lead the technical design and hardening of Windows Credential Providers, ADFS MFA adapters, and WTS services.
• Develop automated diagnostic utilities and tooling with PowerShell and WMI/CIM.
• Collaborate with Product, Security, and Design to document ADRs and automated test pipelines.
• Mentor engineers through code reviews and technical guidance.

Skills

Modern C++ (C++14/17/20)

C

Win32 APIs

AD DS / Kerberos / Windows Server

PowerShell / WMI/CIM scripting

Education

Bachelor's degree in computer science, computer engineering, or related field

Tools

PowerShell

WMI/CIM

Win32 API development

Multi-threading

IPC

Job description

Cisco Systems, Inc. - Cisco Duo Zero Trust OS Logon & Enterprise Applications team seeks a seasoned systems software engineer to design and implement high‑performance authentication components for Windows and macOS.

You will work on custom Credential Providers, ADFS adapters, and passwordless logon technologies, collaborating with product, security, and design to ensure zero‑regression releases and scalable tooling.