Principal Security Engineer

New Today

Overview

Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world a safer place for all. We want to reshape security and empower every user, customer, and developer with a security cloud that protects them with end to end, simplified solutions. The Microsoft Security organization accelerates Microsoft’s mission and bold ambitions to ensure that our company and industry is securing digital technology platforms, devices, and clouds in our customers’ heterogeneous environments, as well as ensuring the security of our own internal estate. Our culture is centered on embracing a growth mindset, a theme of inspiring excellence, and encouraging teams and leaders to bring their best each day. In doing so, we create life-changing innovations that impact billions of lives around the world.

Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world a safer place for all. We want to reshape security and empower every user, customer, and developer with a security cloud that protects them with end to end, simplified solutions. The Microsoft Security organization accelerates Microsoft’s mission and bold ambitions to ensure that our company and industry is securing digital technology platforms, devices, and clouds in our customers’ heterogeneous environments, as well as ensuring the security of our own internal estate. Our culture is centered on embracing a growth mindset, a theme of inspiring excellence, and encouraging teams and leaders to bring their best each day. In doing so, we create life-changing innovations that impact billions of lives around the world. We are looking for a Principal Security Engineer to architect and automate resilient, large-scale cloud environments that fuel cutting-edge security research and autonomous simulation. Leveraging infrastructure-as-code across Azure, AWS, and GCP, you will create reproducible enterprise-grade ranges where AI-driven adversary emulations and detection experiments can run safely at scale. Your work will generate high-fidelity telemetry, accelerate threat analytics, and establish the guardrails that empower researchers, applied scientists, and red-team operators across the organization. Operating as a hands-on technical leader, you will define best practices, mentor peers, and ensure our lab infrastructure remains secure, cost-efficient, and ready for the next breakthrough. Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Qualifications

Qualifications - Required:

  • Bachelor's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 6+ years related experience (e.g., statistics, predictive analytics, research)OR Master's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 4+ years related experience (e.g., statistics, predictive analytics, research)OR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 3+ years related experience (e.g., statistics, predictive analytics, research)OR equivalent experience.
  • 6+ years designing and operating production cloud infrastructure, of which 3+ years were dedicated to hands-on security research (e.g., adversary simulation, log analysis, ) that drove new detections or mitigations.
  • Prodicient coding ability in at least one modern language (Python, Go, or comparable) and deep proficiency in infrastructure-as-code frameworks (e.g., Terraform, ARM/Bicep, or CloudFormation).
  • 3 + years hands-on experience building red-team ranges or adversary-simulation labs—including the automation of attacker tooling, control channels, and safety guardrails.
  • Demonstrated multi-cloud fluency (Azure required, plus working knowledge of AWS and/or GCP) spanning identity, networking, and logging services.
  • Proven history of mentoring or guiding other engineers and partnering cross-discipline with security researchers, applied scientists, or SOC teams to turn threat hypotheses into reproducible cloud environments.


    • Other RequirementsAbility to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include, but are not limited to the following specialized security screenings:

    Microsoft Cloud Background Check:
    - This position will be required to pass the Microsoft background and Microsoft Cloud background check upon hire/transfer and every two years thereafter.

    Preferred Qualifications

  • Proven record of shipping open-source security tooling or presenting original research at conferences such as Black Hat, DEFCON, BSIDES or others.
  • Experience applying large-language models or multi-agent frameworks to security automation, adversary simulation, or detection engineering.
  • Verbal and written communication skills with the ability to convey complex security concepts effectively.
  • Previous project management skills with a proven track record of driving projects to completion.

    • #MSFTSecurity #MSECAI #Cybersecurity #SecurityResearch #IaC #DevOps #RedTeam #BlueTeam

    Responsibilities

  • Architect, automate, and harden multi-cloud research environments via infrastructure-as-code, baking in security controls, policy-as-code guardrails, and one-click teardown to enable rapid, cost-efficient iteration.
  • Engineer telemetry pipelines that let AI-driven adversary simulations run safely at scale, capturing identity, network, and endpoint signals as labeled ground-truth datasets for detection and model training.
  • Collaborate closely with security researchers, red-teamers, and applied scientists to translate attack hypotheses into reusable IaC modules and cloud-native patterns that replicate real-world campaigns.
  • Iterate on simulation frameworks—reducing environment spin-up time, broadening scenario coverage across new cloud services, and embedding detection hooks for blue-team validation.
  • Instrument environments with end-to-end observability dashboards that surface reliability, performance, and spend, driving continuous optimisation of lab operations.
  • Evangelise best practices through internal workshops, open-source contributions, and conference presentations, mentoring engineers and advancing the state of secure cloud research infrastructure.
    • Benefits/perks listed below may vary depending on the nature of your employment with Microsoft and the country where you work.Industry leading healthcareEducational resourcesDiscounts on products and servicesSavings and investmentsMaternity and paternity leaveGenerous time awayGiving programsOpportunities to network and connect
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    Location:
    Gb
    Job Type:
    FullTime

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