Dominique Summerlin
Verified Expert in Engineering
Cybersecurity Developer
Austin, TX, United States
Toptal member since May 27, 2025
Dominique is a cybersecurity analyst with over four years of experience specializing in threat detection, incident response, and security engineering. He has secured enterprise environments for Fortune 100 companies and possesses deep expertise in security information and event management (SIEM) tools, cloud security, and advanced persistent threat (APT) research. Known for his proactive and detail-oriented approach, Dominique is a valuable asset to any cybersecurity team.
Portfolio
Experience
- Research - 13 years
- Cybersecurity - 10 years
- Splunk - 7 years
- Log Analysis - 5 years
- Network Security Monitoring - 5 years
- Enterprise Cybersecurity - 5 years
- Vulnerability Triage - 5 years
- EDR Solutions - 5 years
Work Experience
Security Operations Center (SOC) Analyst
AMEX
- Responded to over 100 high-priority incidents annually, consistently containing threats within service-level agreement (SLA) timelines and preventing data exfiltration in 98% of cases.
- Conducted root cause analyses and delivered executive summaries for over 25 critical security incidents, enhancing stakeholder trust and transparency.
- Trained and mentored four junior analysts, reducing onboarding time by 40% and increasing incident resolution accuracy.
- Monitored and analyzed security information and event management (SIEM) logs across more than 10 client environments, identifying 15 previously undetected threat actor behaviors.
- Developed incident response playbooks that reduced investigation time by 30% and standardized escalation paths across level-1 and level-2 security operations center (SOC) teams.
Project History
Researching APT Groups
https://github.com/domsum03/Researched-Top-APT-GroupsNmap Guide for Parrot OS on TryHackMe
https://github.com/domsum03/Using-NMAP-in-Kali-LinuxParrot OS on VirtualBox
https://github.com/domsum03/Setting-Up-Parrot-OS-on-VirtualBoxAllocate at least 2GB of RAM, although 4GB or more is recommended for better performance. Next, create a virtual hard disk with a minimum size of 20GB, using the VirtualBox Disk Image format with dynamically allocated storage.
Afterward, navigate to Settings, Storage, and load the downloaded ISO file into the optical drive. Under the System section, you can optionally enable EFI and adjust the boot order to prioritize the optical drive. Start the virtual machine and select Install or Live Mode, depending on your needs. Follow the installation prompts to complete the setup.
Once the installation finishes, safely eject the ISO file, reboot the virtual machine, and begin using Parrot OS within VirtualBox. This guide includes screenshots that will help you throughout the process.
Education
Master's Degree in Computer Science
Western Governors University - Austin, TX, USA
Bachelor's Degree in Cybersecurity
Old Dominion University (ODU) - Norfolk, VA, USA
Certifications
GIAC Certified Incident Handler Certification
SANS
Certified Ethical Hacker (CEH)
EC-Council
Splunk Fundamentals 1
Splunk
Security Plus
CompTIA
Skills
Tools
Splunk, ELK (Elastic Stack), Wireshark, VirtualBox, Microsoft Exchange
Industry Expertise
Cybersecurity
Languages
Python
Frameworks
Windows PowerShell
Platforms
Windows, Kali Linux, CrowdStrike, Linux
Other
Vulnerability Triage, Research, Vulnerability Management, Security Operations Centers (SOC), SIEM, Enterprise Cybersecurity, Log Analysis, EDR Solutions, Network Monitoring, Network Security Monitoring, Incident Response, Virtual Machines, Microsoft Defender Antivirus, VM, Digital Forensics, Email Security, Office 365, Social Engineering, Palo Alto Networks, Security Information and Event Management (SIEM), Red Teaming
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