
Constantly Curious.
Data Nerd.
Easily Amused.
Welcome to my corner of the Internet!
Thanks in advance for visiting!
If you wanted to see Gibbs & Chewie - please visit their Instagram page instead
EXPERIENCE
Senior Fraud Detections Strategist | Microsoft | Redmond, WA
November 2024 – Present
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Acted as SME on Microsoft 365 (M365) fraud and abuse for Central Fraud Abuse Risk (CFAR) team focusing on real time and behavioral detection models
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Collaborated with data scientists to prioritize data analyses and studies addressing fraud scenarios on M365, including examining malicious actor behavior during outbound email activities
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Worked closely with data science teams to provide business expertise for implementation of a domain impersonation detection model for M365 tenant management scenario
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Streamlined and managed investigation outcome feedback to data science for model training and data labelling
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Worked with internal product teams to assess fraud risks and build heuristics for fraud detection and prevention
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Partnered with fraud researchers to prototype AI agents to augment and scale investigations into suspicious organizations
Senior Product Manager | Microsoft | Redmond, WA
March 2022 – November 2024
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Focused on Attack Simulation Training (AST) within Microsoft Defender for Office 365 (MDO)
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AST is a product that enables organizations to send phishing simulations and trainings to measure, manage, and improve their organization’s resilience against phishing email attacks and social engineering
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Designed and launched new telemetry for customers to gain better insights of user susceptibility behavior
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Bridged behavioral telemetry gaps by implementing additional user behavior data signals to help customers better calculate an organization’s susceptibility to phishing attacks
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Public announcement: Attack Simulation Training: New insights into targeted user behavior - Microsoft Community Hub
Link: Announcement
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End-to-end design and launch of training-only campaign feature to enable organizations to utilize the AST security full training catalog
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Addressed customers’ needs to have flexibility in their phishing awareness campaigns programs
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Managed partner relationships to develop new training content and expand existing training content catalogue by more than 300%
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15% of active tenants used this feature within 1 month of launch
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Expanded existing API features to include training only campaign
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Authored blog release: Training only campaign is now available with an expanded training module library - Microsoft Community Hub
Link: Announcement
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Evangelized AST capabilities and roadmaps through executive briefings, public forums, and direct customer demos
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Managed partner relationship with content providers to influence partner content creation, design, strategy, and delivery timelines on educational content
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Designed and coordinated active private preview of an improved end user portal with a new gamification framework focused on increasing user resilience against social engineering attacks
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Integrated improved user experience for email quarantine experience and worked with engineering to reduce user latency load by 99%
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Partnered with security researchers and analysts to gather design requirements, develop, and improve data quality for analyzing malicious messages and security alerts
Program Manager/ Fraud Strategy | Microsoft | Redmond, WA
October 2018 – March 2022
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Worked collaboratively and globally across security, operations, and product teams to develop the holistic fraud prevention strategy for M365 paid subscription fraud, free trial abuse, and new M365 product onboardings including Windows 365
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Led cross org team across product team, business development, marketing, data science, and operation to set KPIs and reduce the significant fraud pressure for Windows 365 during their initial launch phase by more than 28%
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Identified and created solution to address $2.5M+/ year loss due to legacy billing system – implementation of mitigation and identification solution and process reduced annual loss by 86%
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Created strategy to remediate $500k+/ month fraud issues on M365 academic platform to reduce subscription reselling abuse and spam attacks by 30%
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Acted as SME on educational tenant and subscription abuse across multiple teams and coordinated the plan of action to identify and mitigate bad actors which resulted in the takedown of multiple fake educational institutions on the Microsoft platform
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Provided continuous training and peer development for manual fraud investigators and data scientists on business domain knowledge and functional skills
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Lead DEI program for a global team and developed events to enhance inclusion habits among team members and build a stronger global cross-site culture
Fraud Data and Business Analyst | Remitly | Seattle, WA
June 2016 – June 2018
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Identified and monitored fraud trends and performed risk analysis for day-to-day operations
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Forecasted expected fraud losses using regression analysis
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Analyzed fraud-prone customer populations using customer segmentation techniques
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Reduced losses in a risky corridor by 75% within 4 months
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Maintained flat fraud dispute rate as business increased over 100%
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Translated data into fraud signals and worked with engineering to turn signals into features
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Implemented and documented training for investigation team to identify fake bank statements
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Partnered with data science team to develop machine learning tools to increase efficiency in risk reviews
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Provided subject matter expertise to help identify features and provide feedback on tool outputs
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Improved precision of the output to target specific populations in addition to all customers
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Established best practices for the fraud team
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Drove weekly communication with international risk operations team to understand trends from real time investigations to improve product and prevent fraud
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Created metrics and dashboards to increase transparency within the larger organization
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Developed end-to-end process for risk rules with minimal impact to operations
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Implemented code reviews and QA process for fraud analyst team
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Senior Consultant | Hitachi Consulting | Seattle, WA
April 2015 - April 2016
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Led data and business intelligence development for a $50 million customer refund program at an international telecommunication company
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Identified customer population by consolidating key information across various department databases
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Managed 3 TB database for legal counsel
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Aggregated and analyzed customer segmentation data to support legal counsel
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Coordinated backend database update schedule with multiple departments to ensure efficient customer refund
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Migrated 15 million customer record data from vendor to client database
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Cleansed data and provided customer segmentation logic
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Reduced data upload time by 50% through Python implementation
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Maintained data integrity with vendor by performing range, constraint, data type, and cross-reference validation
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Consultant | Hitachi Consulting | Houston, TX
July 2012 - April 2015
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Created and delivered prototype for a digital worker’s handbook for upstream oil and gas client as the lead business intelligence developer
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Parsed database logic for legacy handbook entry system
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Normalized database to improve report generation by 20%
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Provided business intelligence development and analysis for casino client
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Migrated and optimized data for report generation in an EDW system
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Trained clients to troubleshoot report errors
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Managed a cross-functional team to deliver a client’s internal SharePoint web portal using Agile project management practices
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Lead business requirements meetings and worked with marketing team to identify target users’ needs
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Mapped company-wide roll-out strategy of internal web portal with client marketing team
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Technical Manager | Who’s HOU | Houston, TX
November 2011 – May 2012
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Managed technology aspects of Who's HOU project, a digital driven showcase to promote Houston’s music, film, and interactive industries
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Conducted user survey to determine content type for the site
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Assisted in writing and pursuing grants and donations
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Assisted in the launch of the project at South by Southwest (SXSW) 2012
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Details available: Who's HOU
Student Co-Founder | ZikomO NeoSyp | Houston, TX
September 2010 – May 2011
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Focused on the device user experience and interface for an award winning prototype for neonatal syringe pump for developing countries
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Developed business plan for initial prototype distribution
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Applied for provisional patent in 2011
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Details available: Appropedia, Engineering for Change
Resume
PUBLICATIONS
Journal
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Lewinski, N., Zhu H., Ouyang, C., Conner G., Wagner, D., Colvin, V., Drezek, R. Trophic Transfer of Amphililic Polymer Coated CdSe/ZnS Quantum Dots to Danio rerio.” Nanoscale. 2011 Aug;3(8):3080-3.
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Lewinski, N., Zhu, H., Jo, H-J., Pham, D., Kamath, R., Ouyang, C.,Vulpe, C., Colvin, V., Drezek, R. Biodistribution of water solubilized CdSe/ZnS quantum dots in Daphnia magna. Environmental Science & Technology. 2010 Feb: 44(5): 1841-6.
Conference
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Sung, C., Kamath, R., Cui, Y., Ouyang, C., Carstens, E., Ramos, R., Oden, Z. M. Design of a novel mechanical syringe pump for neonatal care in low-resource settings. 2011 IEEE Global Humanitarian Technology Conference (Oct. 2011)
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Lewinski, N., Kamath, R., Ouyang, C., Zhu, H., Jo, H., Pham, D., Vulpe, C., Colvin, V., Drezek, R. Biodistribution of amphiphilic polymer coated CdSe/ZnS QDs in Daphnia magna. International Conference on the Environmental Implications and Applications of Nanotechnology (June 2009)
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Lewinski, N., Zhu, H., Ouyang, C., Colvin, V., Drezek, R. Fluorescence localization of water solubilized CdSe/ZnS QDs in the freshwater invertebrate, Daphnia magna. NSTI Nanotechnology Conference and Expo (May 2009)
EDUCATION
Masters in Bioengineering
Rice University | Houston, TX
B.S in Bioengineering
Rice University | Houston, TX
SKILLS
Technical
SQL
Kusto
Python
Tableau
Teradata
ETL
C#
Adobe Creative Suite
HTML5 / CSS3
Django
Matlab
Functional
JIRA
Azure DevOps
Project management
Agile
Fraud Prevention
Public communication
Market analysis