About Me

About Me

Dallas Haselhorst

Hello! My name is Dallas Haselhorst (hazel-horse). I have worked as a general IT and information security professional for over 20 years. I received a PoliSci minor and concurrent bachelor degrees in Information Networking and Telecommunications (INT) and Computer Information Systems (CIS) from Fort Hays State University. Go Tigers! During my last few years of college and for several years after, I worked in healthcare IT. I then founded and co-owned a managed IT service provider until its acquisition in July 2016 . After assisting with the transition, it was time to move on.

In early 2019, I completed the final requirements for my Master of Science in Information Security Engineering (MSISE) degree from the SANS Technology Institute (STI). I hold numerous industry certifications including the CISSP, GSEC, GCIH, GCCC, GCPM, GPEN, GMON, GCIA, GWAPT, and GDSA. I’m also GSE #231. When not working and/or finding new angles on infosec issues, I love learning and helping opensource projects. I also enjoy tinkering with all things technology, helping others learn tech, molding my daughters into card carrying nerds, and spending time with my family.

  • BSidesKC organizer/CFP reviewer/team member
  • GIAC Advisory Board member
  • Speaker/researcher/entrepreneur
  • Technology lover
  • Giant nerd

Follow me on Twitter
@oneoffdallas – Dallas Haselhorst

Connect with me on LinkedIn

Contribute to my projects
Github – oneoffdallas

Uncovering Indicators of Compromise (IoC) Using PowerShell, Event Logs and a Traditional Monitoring Tool
HL7 Data Interfaces in Medical Environments: Understanding the Fundamental Flaw in Healthcare
HL7 Data Interfaces in Medical Environments: Attacking and Defending the Achille’s Heel of Healthcare
Tripwire (The State of Security) – HL7 Data Interfaces in Medical Environments
Onion-Zeek-RITA: Improving Network Visibility and Detecting C2 Activity

Link to Dallas Haselhorst GIAC Security Expert (GSE)Link to Dallas Haselhorst GIAC Defensive Security Architecture (GDSA)
Link to Dallas Haselhorst GWAPTLink to Dallas Haselhorst GCIALink to Dallas Haselhorst GMON
Link to Dallas Haselhorst GPENLink to Dallas Haselhorst GCPM Acclaim Link to Dallas Haselhorst GIAC Gold Paper
Link to Dallas Haselhorst GCCC Link to Dallas Haselhorst GCIHLink to Dallas Haselhorst GIAC advisory board member
Link to Dallas Haselhorst GCIA GSECLink to Dallas Haselhorst CISSPElectronic Frontier Foundation member -> Dallas Haselhorst