Available for projects

_

Solution Architect specializing in SIEM, XDR, and MDR implementations. I help organizations strengthen their security posture through strategic planning and hands-on technical expertise.

Start a conversation LinkedIn
0+
Years Experience
0+
Certifications
0+
Projects Delivered
mwinterstetter
$ whoami
Masseo Winterstetter - Solution Architect

Masseo Winterstetter

Solution Architect

$ cat /etc/profile
EMPLOYER r-tec IT Security GmbH
LOCATION Frankfurt am Main, DE
$ ls -la ~/links/
hackthebox tools
About

Security that scales with your business

I architect and deploy enterprise security solutions that actually work—with deep expertise in Endpoint Protection, SIEM/XDR, and Managed Detection & Response.

Every organization faces unique threats. I translate complex security requirements into reliable, scalable implementations—and when incidents strike, I'm the one you want leading the response.

Endpoint Security

Deploy and manage EPP, EDR, and XDR platforms to protect every device in your organization

SIEM Solutions

Engineer detection rules and fine-tune alerts to surface real threats, not noise

MDR Services

Continuous threat monitoring and expert-led response when every second counts

Incident Response

Contain active breaches, neutralize threats, and restore operations fast

Experience

Career Timeline

Solution Architect

r-tec IT Security GmbH

Dec 2025 - Present
  • Designing and deploying SIEM/EDR/XDR/MDR/NDR solutions for enterprise customers
  • Managing integration projects from planning through delivery
  • Building customer-specific rulesets, reports, and dashboards
  • Supporting pre-sales activities and vendor engagement
  • Collaborating with SOC teams on project transitions
CrowdStrike Exabeam Rapid7 Microsoft Graylog

Professional Services Consultant

Longwall Security

Oct 2024 - Nov 2025
  • Architected enterprise security solutions with focus on Sophos and Rapid7
  • Enhanced threat detection through optimized SIEM/EDR/XDR configurations
  • Delivered technical enablement and training for customers and SOC teams
  • Improved SOC service quality through automation and rule-set tuning
Sophos Rapid7 SIEM EDR/XDR/MDR

Cyber Security Consultant

SAVE IT FIRST GmbH

Jan 2024 - Sep 2024
  • Implemented security solutions across Endpoint, SIEM, and Vulnerability Management
  • Delivered technical demos and enablement sessions for enterprise customers
  • Conducted incident analysis and DFIR response
  • Led vulnerability assessments and remediation guidance
Vulnerability Management DFIR SIEM

Computer Science Expert: System Integration

SAVE IT FIRST GmbH

Jul 2021 - Jan 2024
  • Deployed and secured IT infrastructure including networks, firewalls, and servers
  • Implemented security solutions and improved baseline hardening
  • Accelerated dual apprenticeship with cyber security focus
  • Named one of 2024's finest at IHK Trier
Infrastructure Firewalls Compliance
Certifications

Professional Credentials

Next-Gen SIEM Associate

CrowdStrike Falcon Champions

Core Security Associate

CrowdStrike Falcon Champions

Cloud Security Associate

CrowdStrike Falcon Champions

Identity Associate

CrowdStrike Falcon Champions

RTSP: InsightVM Advanced

Rapid7

RTSP: InsightIDR Advanced

Rapid7

Firewall E, A & Technician

Sophos

Central E, A & Technician

Sophos

Client Security Professional

ESET

Windows Server Security

ESET

Jr Penetration Tester

TryHackMe

Horizon 5.0

Macmon

Projects

Selected Work

Ransomware Incident Response

Led crisis response during an active ransomware attack on a major logistics group. Coordinated cross-functional teams to contain the threat, preserve forensic evidence, and restore critical systems while managing stakeholder communications.

Incident Response Ransomware DFIR

Global Healthcare EPP Migration

Architected and executed a complete endpoint protection overhaul for an international medical group. Delivered seamless migration across 4 countries with zero downtime, ensuring uninterrupted patient care operations throughout.

EPP Healthcare Global Deployment

Enterprise SIEM & XDR Rollout

Designed and deployed integrated SIEM/XDR infrastructure for two major breweries. Built custom detection rules, automated response playbooks, and real-time dashboards tailored to manufacturing and OT environments.

SIEM XDR Manufacturing

Automotive NGAV Transformation

Spearheaded next-generation antivirus deployment for a global automotive sensor manufacturer. Replaced legacy AV across international facilities while meeting strict compliance requirements and minimizing production impact.

NGAV EDR Automotive
Comms

Establish Contact

STANDBY

Mission Planning

Ready to discuss your security architecture, deployment strategy, or next implementation project. Let's build your defense.

Open Channel
PRIORITY

Active Threat?

Security incident in progress? Direct line for immediate response and rapid containment. Available around the clock.

Emergency Line