Dan Kottmann
Founder at STACKTITAN, LLC
Omaha Metropolitan Area United States
Summary
🤩
Rockstar🎓
Top SchoolDan Kottmann is a seasoned offensive security leader and founder with 12+ years delivering adversarial testing, red team engagements, and penetration assessments for enterprise clients. As Founder and Managing Member of STACKTITAN and former Practice Manager at Optiv, he blends hands-on exploit and tooling expertise (Python, Go, Java) with practice growth, mentoring, and client-facing strategy. He holds Offensive Security certifications and a track record of conference presentations (Defcon, BSides, Black Hat Arsenal) that underscore his community standing. An active contributor to open-source security tooling, he implemented a concurrent Go-based subdomain guessing tool for the well-known Black Hat Go repo, demonstrating practical DNS and concurrency skills. Based in the Omaha area, he pairs deep technical craft with operational leadership and a history of building both security practices and small businesses.
12 years of coding experience
11 years of employment as a software developer
Bachelor of Science (BS), Computer Science, Bachelor of Science (BS), Computer Science at University of Nebraska at Omaha
Github Skills (6)
goroutine10
channel10
go10
dns10
concurrency10
command-line-interface8
Programming languages (2)
Github contributions (5)
blackhat-go/bhg
Jul 2019 - Aug 2019
Code samples for No Starch Press Black Hat Go
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 commits, 9 pushes in 22 days
Contributions summary:Dan implemented a subdomain guessing tool in Go, utilizing the `miekg/dns` library for DNS lookups. This involved creating functions to query A and CNAME records, handling potential errors, and organizing the results. The code demonstrates the use of goroutines and channels for concurrent DNS resolution, improving the tool's efficiency. The work contributes to the repository's purpose of providing code samples for Black Hat Go.
golangpresshatgoblack-hat
stacktitan/smb
Feb 2017 - May 2019
Contributions:10 commits, 8 pushes, 1 branch in 2 years 4 months
golangsmb
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