Principal Applied Science Manager (Azure Anti-Fraud Team)
CurrentManaging a combined team of Engineers and Data & Applied Scientists to protect Azure from Fraud and Account Takeovers.
May 2022 - Present
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Peter Leong Email & Phone Number
Principal Applied Science Manager
at
Microsoft
2 work emails found
@microsoft.com
2 phones found area 503
LinkedIn matched
✓ Verified Jun 2026
4 data sources
Profile completeness 100%
Current company
Role
Principal Applied Science Manager
Location
Redmond, Washington, United States
Company size
Who is Peter Leong? Overview
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Quick answer
Peter Leong is listed as Principal Applied Science Manager at Microsoft, a company with 189892 employees, based in Redmond, Washington, United States. AeroLeads shows a work email signal at microsoft.com, phone signal with area code 503, and a matched LinkedIn profile for Peter Leong.
Peter Leong previously worked as Principal Applied Science Manager (Azure Anti-Fraud Team) at Microsoft and Principal Data Scientist (Azure Anti-Fraud Team) at Microsoft. Peter Leong holds Ph.D., Applied Physics from California Institute Of Technology.
Company email context
Email format at Microsoft
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{first}.{last}@microsoft.com
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Profile bio
About Peter Leong
Experienced Data Scientist specializing in detection of fraud and abuse in cloud services- using machine learning, statistical analysis, data exploration and visualization techniques - leveraging 5+ years experience in production-level software development of desktop applications and online servicesProgramming Languages: C, C++, C#, Perl, R, SQL, Scope, PowerShell, PythonPh.D. In Applied Physics from CaltechCompleted CFA exams (Level I,II,III)
Listed skills include C++, Software Development, Perl, Linux, and 23 others.
Current workplace
Peter Leong's current company
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Microsoft
7 roles
Peter Leong work experience
A career timeline built from the work history available for this profile.
Principal Data Scientist (Azure Anti-Fraud Team)
End-to-end data science work for Azure Anti-Fraud:- Data science explorations and feature engineering- Communication and visualization of findings- Rapid prototyping of multiple new detectors- Integration and implementation of detectors in production environment- Developed infrastructure for A-B testing and monitoring of detector performance
Mar 2016 - May 2022
Data Scientist (Windows Core Data Science Team)
- Led multiple data science projects from inception to completion, including writing of proposals and reports, presenting to partner teams and directors, and driving implementation of recommendations:
- Applied bag-of-words with random forest to predict if app review contained actionable feedback, achieving 88% accuracy
- Applied decision tree to windows telemetry data to predict important reliability bugs, increasing bug detection by 30% and detecting 4% of bugs earlier than previous approach
- Applied linear regression to predict build times, achieving RMSE of 3.0 minutes
- Analyzed build dependency graph to improve build efficiency by a 9% reduction in build times
- Applied anomaly detection to time series and cross-branch build data to detect build time regressions
Feb 2014 - Mar 2016
Software Development Engineer (Xbox Live)
Worked on Xbox Live Accounts, Purchasing, Licensing, Subscriptions and Ingestion services for Xbox 360 and Xbox One.- Developed services, wrote unit tests and test clients for services- Deployed services to production and support live services as on-call developer- Collaborated across teams to implement services and fix and/or mitigate live site bugs
Dec 2012 - Feb 2014
Software Development Engineer (Excel)
Worked on a variety of new and legacy features across Business Intelligence, Charting, File Format and Basic Use over 2 ship cyclesImplemented Recommended PivotTables and Recommended PivotCharts features in Excel 2013.Drove excel security process for security fixes for Excel 2000, 2002, 2003, 2007, 2010Authored 2 patents on features.
Oct 2008 - Nov 2012
Graduate Student
Developed distributed computation system which worked across Mac OS X, Linux, Unix and IRIX operating systems(Perl).Developed parallelized image processing software (C, C++) on Windows, Mac OS X, Linux, Unix, IRIX operating systems.
Sep 2002 - Aug 2008
Software Development Engineer Intern (Msdn)
Developed web user interfaceUtilized SQL, XML, Javascript,.NET
Sep 2006 - Dec 2006
Team & coworkers
Colleagues at Microsoft
Other employees you can reach at microsoft.com. View company contacts for 189892 employees →
MM
Maria Mercado
Colleague at MicrosoftLos Angeles, California, United States, United States
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EW
Everest Wein
Colleague at MicrosoftSan Clemente, California, United States, United States
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SM
Shahad Mohammmed
Colleague at MicrosoftRiyadh, Riyadh, Saudi Arabia, Saudi Arabia
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MJ
Monika Jeziorska
Colleague at MicrosoftKatowice, Śląskie, Poland, Poland
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HP
Hritvik Patel
Colleague at MicrosoftMumbai, Maharashtra, India, India
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FT
France Training Coach
Colleague at MicrosoftParis, Île-de-France, France, France
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AH
Amira Halima
Colleague at MicrosoftAlgiers, Algiers, Algeria, Algeria
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LB
Lê Bi
Colleague at MicrosoftHanoi, Hanoi, Vietnam, Viet Nam
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XC
Xin Chen
Colleague at MicrosoftChaoyang District, Beijing, China, China
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VL
Vivi Lee
Colleague at MicrosoftMinhang District, Shanghai, China, China
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Maria Mercado
Colleague at MicrosoftLos Angeles, California, United States, United States
View →
EW
Everest Wein
Colleague at MicrosoftSan Clemente, California, United States, United States
View →
SM
Shahad Mohammmed
Colleague at MicrosoftRiyadh, Riyadh, Saudi Arabia, Saudi Arabia
View →
MJ
Monika Jeziorska
Colleague at MicrosoftKatowice, Śląskie, Poland, Poland
View →
HP
Hritvik Patel
Colleague at MicrosoftMumbai, Maharashtra, India, India
View →
FT
France Training Coach
Colleague at MicrosoftParis, Île-de-France, France, France
View →
AH
Amira Halima
Colleague at MicrosoftAlgiers, Algiers, Algeria, Algeria
View →
LB
Lê Bi
Colleague at MicrosoftHanoi, Hanoi, Vietnam, Viet Nam
View →
XC
Xin Chen
Colleague at MicrosoftChaoyang District, Beijing, China, China
View →
VL
Vivi Lee
Colleague at MicrosoftMinhang District, Shanghai, China, China
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3 education records
Peter Leong education
Ph.D., Applied Physics
M.Sc., Applied Physics
B.Sc., Applied Physics
FAQ
Frequently asked questions about Peter Leong
Quick answers generated from the profile data available on this page.
What company does Peter Leong work for?
Peter Leong works for Microsoft.
What is Peter Leong's role at Microsoft?
Peter Leong is listed as Principal Applied Science Manager at Microsoft.
What is Peter Leong's email address?
AeroLeads has found 2 work email signals at @microsoft.com for Peter Leong at Microsoft.
What is Peter Leong's phone number?
AeroLeads has found 2 phone signal(s) with area code 503 for Peter Leong at Microsoft.
Where is Peter Leong based?
Peter Leong is based in Redmond, Washington, United States while working with Microsoft.
What companies has Peter Leong worked for?
Peter Leong has worked for Microsoft and Caltech.
Who are Peter Leong's colleagues at Microsoft?
Peter Leong's colleagues at Microsoft include Maria Mercado, Everest Wein, Shahad Mohammmed, Monika Jeziorska, and Hritvik Patel.
How can I contact Peter Leong?
You can use AeroLeads to view verified contact signals for Peter Leong at Microsoft, including work email, phone, and LinkedIn data when available.
What schools did Peter Leong attend?
Peter Leong holds Ph.D., Applied Physics from California Institute Of Technology.
What skills is Peter Leong known for?
Peter Leong is listed with skills including C++, Software Development, Perl, Linux, Machine Learning, Sql, Unix, and R.
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