Sean Whalen
Sr. Information Security Engineer
Cincinnati Metropolitan Area United States
Summary
🤩
Rockstar🎓
Top SchoolSean Whalen is a senior information security engineer with 11 years' experience blending hands-on malware analysis, incident response leadership, and strategic defense for enterprises and SMBs. He leads and mentors IR teams, builds custom Python SOAR integrations and Splunk dashboards, and configures modern security stacks including CrowdStrike, Palo Alto, Fortinet, Proofpoint and IronPort. Sean contributes to notable open-source security projects—improving the parsedmarc DMARC parser and hardening the CAPE malware analysis framework—and maintains his own tools like CheckDMARC. As an independent consultant he implements standards such as DMARC and delivers practical security posture improvements, while advising cybersecurity education programs locally. Known for pairing deep technical skill with strong rapport-building, he consistently turns complex threats into clear operational improvements.
11 years of coding experience
9 years of employment as a software developer
Bachelor of Science (B.S.), Computer Information Systems, Bachelor of Science (B.S.), Computer Information Systems at Ohio Dominican UniversityComputer Support Technology, Computer Support Technology at Fairfield Career Center
English, Spanish
Github Skills (15)
debug10
malware10
dmarc10
python10
anti-malware10
django10
imap9
amazon-elasticsearch9
elasticsearch-api9
sqlalchemy9
aws-elasticsearch9
elasticsearchquery9
elasticsearch9
iptables8
git4
Programming languages (18)
Github contributions (5)
domainaware/parsedmarc
Jan 2019 - Aug 2022
A Python package and CLI for parsing aggregate and forensic DMARC reports
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 releases, 4 reviews, 174 commits in 3 years 7 months
Contributions summary:Sean primarily contributed to the `parsedmarc` Python package, focusing on enhancements and bug fixes. Their work includes updating the package version, addressing code style issues, and fixing documentation formatting. They also worked on making `dkim_aligned` and `spf_aligned` case insensitive, implementing fixes for IMAP connections, and upgrading dependencies like `dateparser`.
forensicreportspythondmarcparsing
ctxis/CAPE
Jan 2019 - Sep 2019
Malware Configuration And Payload Extraction
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 commits, 15 PRs, 24 comments in 7 months
Contributions summary:Sean primarily focused on fixing bugs and improving the stability and functionality of the CAPE malware analysis framework. Their contributions include resolving issues in the web UI, correcting timezone handling, and addressing type errors within critical modules. Additionally, the user implemented fixes for specific dependencies, such as SQLAlchemy, and addressed code readability concerns within existing signature modules. The user also made adjustments to network-related signature modules, resolving syntax errors.
payloadmalwareextractionmalware-analysis
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