ONLINE│Zurich, CH│AS214476│TLPT / FINMA cleareduptime 00:00:00││
root@ressl:~$ whoami█

I break what /* I used to build. */

Robert Ressl. Offensive Security leader running a global practice across 11 countries. Before red-teaming Fortune 500s, I spent 15+ years as a Linux architect for UBS, Swisscom, and the United Nations. DORA contributor. FINMA & TLPT cleared. AS214476 operator.

[ Make an offer → ]$ cat skills.txt
                     ▂▄▄▅▄▃▂
                  ▂▅▇███▍  ▔▀▅▃
                ▄▇██████▍▎    ▝▚▃
              ▗█████████▙▍      ▔▜▖
             ▟█████████▛▀▀  ▄▂    ▜▄
            ▟██████▛▀▜▃▄▄▄▄▃▁ ▔ ▗▁ █▌
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       ▗▛▗█████▎▔      ▋ ▝       ▕█████▖▜▏
       ▟▚██████▍       ▌         ▐██████▝▌
       █▝████▌▐▊     ▝▄▄▁▃▄▘     ▕▋▟████▏▊
       ▐▌▜████▇▋   ▖   ▀▀▘    ▖  ▐█████▛▐▘
        ▜▖██████▖▚    ▀▀▀▀▀ ▔    ▟████▀▗▘
         ▜▞▜█████▖      ▝ ▔    ▗▟████▘▟▘
          ▀▙▝█████▆▟▖        ▃▟▜███▛▚█▘
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    ▁▄▆██████████▇▅██▛▀▄   ▃▇▙▆█████▙▇▇▆▅▃█▆▄▁
  ▗▆███████████████▀██▙▂ ▃▇██▀████████████████▙
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 ▔▔▀▀▀▀▀▀▀▀▀▀██████▊▟▀▀▀▀▀▔▔▕█
                   ▐▊       ▕█▏
                   ▝▘        ▔
100+
Engagements — EU / US / Asia
42
Certifications held
15+
Years — Linux / DevOps / Security
11
Countries — global practice
// 02. interactive shell

Try the terminal

Really. It works. Tab-complete is not a feature — just type a command.
guest@ressl.ch:~ — bash
╔══════════════════════════════════════════════════════════╗
║ ressl.ch // Offensive Security & Infra Engineering ║
║ Session recorded. All commands are safe to run. ║
╚══════════════════════════════════════════════════════════╝
Last login: just now from everywhere.
Type `help` for commands. Type `hire` if you’re serious.
guest@ressl:~$█
// 03. competencies

cat skills.txt

Stack built over 20 years. Levels are honest — 5 = production, architect-grade; 4 = senior hands-on; 3 = comfortable.
-- ~/skills.txt --------------------------------5462 bytes · ro
## linux / systems20+ yrs
├─RHEL / CentOS / Rocky5/5
├─Debian / Ubuntu5/5
├─Kernel & systemd internals5/5
├─HA clustering (pacemaker/corosync)5/5
├─SELinux / AppArmor hardening4/5
├─BGP / networking / iptables5/5
## offensive security10+ yrs
├─Red Team / APT simulation5/5
├─Web app pentesting (OSWE)5/5
├─Active Directory attacks5/5
├─Privilege escalation (OSEP)5/5
├─TLPT / FINMA engagements5/5
├─Custom C2 & implant dev4/5
├─Wireless / RF (OSWP)4/5
├─Cloud pentesting (AWS/Azure/GCP)4/5
## devops / cloud15+ yrs
├─Kubernetes / OpenShift5/5
├─Ansible / Puppet / Chef5/5
├─Terraform / IaC5/5
├─AWS / GCP architecture5/5
├─CI/CD (GitLab, Jenkins, GHA)4/5
├─Observability (Prom/Grafana/ELK)4/5
## ai / llm security3+ yrs
├─LLM red teaming / jailbreaks5/5
├─MCP agent security (firewall, scanner)5/5
├─Prompt injection research5/5
├─Model training & fine-tuning4/5
├─LLM architecture (transformers, RAG)4/5
├─MLOps / model deployment4/5
├─Vibe coding with Claude / Copilot5/5
## development15+ yrs
├─Go (production, tooling)5/5
├─Python (red team + ML)5/5
├─Swift / SwiftUI (4 App Store apps)4/5
├─Rust3/5
├─TypeScript / React4/5
├─Bash / shell scripting5/5
// 04. career

git log --oneline

From Linux engineer at 20 to global practice lead. No gaps, no pivots — just progression.
2023 — now
Associate Director, Offensive Security Global
@ Kyndryl · now
Global practice lead. 100+ engagements across banking, insurance, automotive, CI. DORA / FINMA / TLPT. C-Level reporting.
2022 — 2023
Senior Red Team Lead Engineer, Global
@ Kyndryl
APT simulation for Fortune 500. Custom tooling — 40% efficiency gain in engagement delivery.
2021 — 2022
Associate Partner Security
@ Kyndryl
Built consulting practice and GTM strategy after IBM spin-off.
2019 — 2021
Security Consultant & Cloud Architect
@ IBM
Cloud transformations — AWS, GCP, OpenShift, K8s. Founded consulting security division.
2018 — 2019
DevOps Engineer Expert
@ Avectris AG
Founded Linux department. Backend automation in Go (80% workload reduction). Scrum Master.
2016 — 2017
DevOps Engineer
@ Swisscom AG
Automation for Swisscom TV (300+ channels). Voice control system. 35+ engineers trained.
2014 — 2016
Linux Architect
@ EveryWare AG
Enterprise infrastructure for Allianz, JobCloud, UBS AG.
2013 — 2014
Linux DevOps Engineer
@ CTBTO (United Nations)
Migrated 600 nodes from CFEngine to Puppet. Near 100% config automation.
2009 — 2012
Lead Solution Architect
@ Schrack Seconet AG
Rebuilt global IT (HQ + 16 branches). 100% security audit pass. ERP RPO: 1 day → 15 min.
2004 — 2008
Linux Engineer
@ Freelance
HA systems in Interxion datacenters. 99.99% uptime.
// 05. credentials

ls -la ~/.certs

42 active certifications. The ones most people stop at I got 15 years ago. (38 total)

Security & Offensive 9 certs

CISSPOSEPOSWEOSCPOSCCOSWAOSWPCRTOPNPT

CompTIA 8 certs

CySA+CNVPPenTest+CSISSecurity+Network+Server+A+

Red Hat 9 certs

RHCARHCE (6, 7, 8)RHCSA (6, 7, 9)EX188 ContainersEX358 ServicesEX288 OpenShiftEX180 Containers/K8sEX447 Ansible BestEX407 Ansible Auto

Linux Foundation & LPI 4 certs

LFCELFCSLPI-3 (304)LPI-3 (303)

Cloud & ITSM 3 certs

AWS Solutions ArchitectAWS Cloud PractitionerITIL v3 Foundation

Chef / DevOps 5 certs

Extending ChefCertified Chef DeveloperDeploying CookbooksLocal Cookbook DevBasic Chef Fluency
// 06. open source + products

Projects that ship

Not side-project theater — real tools, real users, real installs.
// AI agent security

mcp-firewall

Security firewall for AI agents speaking MCP. 12-stage pipeline, policy engine, Ed25519-signed audit trail. DORA / FINMA / SOC2 compliance reports out of the box.

$ pip install mcp-firewall
PythonMITgithub.com/ressl
// AI agent security

mcpwn

Security scanner for MCP servers. 10 vulnerability checks, pre-deployment scanning for supply chain & prompt injection vectors.

$ pip install mcpwn
PythonMITgithub.com/ressl
// Writeup platform

terminal-trouble.com

HTB / CTF writeups. Green-on-black, 2px borders, the whole brutalist hacker aesthetic. Built in Go + Fiber + HTMX.

GoHTMXself-hosted on AS214476
// 07. iOS apps

App Store: 4 published apps

Swift / SwiftUI. Yes, I still ship product code.

Uhr Lernen Einfach

Learn to read clocks. 7 game modes, 8 themes, Game Center.

App StoreiOS

ABC Lernen

Learn the alphabet. 8 game modes — writing, matching, syllables.

App StoreiOS

Pixel Privacy

Blur faces & license plates in photos. 100% offline, on-device.

App StoreiOS

CraftFace

Turn your selfie into a Minecraft character. 3D preview, 7 outfits.

App StoreiOS
// 08. network

My own Autonomous System

RIPE NCC member. Open peering. Because why wouldn’t you.
AS214476 // ressl.ch
ASN214476IPv4 prefix5.182.62.0/24IPv6 prefix2a01:e000::/29PeeringOpenRIPE membersince 2024PeeringDBpeeringdb.com/net/41375
// 09. regulatory

Audit-grade by design

Not every hacker can sign off a FINMA report. I can.
§

DORA · FINMA · TLPT

Contributed to the EU DORA regulation draft (AmChamEU Working Group, Brussels). Conduct FINMA-regulated penetration tests and Threat-Led Penetration Testing engagements for Swiss financial institutions.

DORAFINMATLPTSOC2ISO 27001
// 10. recognition

Signal worth noting

🏆

"Heart of Kyndryl" — 2024

Awarded for building a global offensive security practice from zero to 11 countries. Plus: contributions to EU DORA, publications (Computerworld CH), ISSA & ISSS memberships, and training 35+ engineers at Swisscom.

Your CISO can’t do what I do.

Hire me before your competitor does. I’m entertaining FTE offers and selective consulting engagements — Switzerland, EU, remote. Top-tier compensation expected; let’s skip the small talk.

✉ rr@canus.chin / LinkedIn DM📅 Book 30 min
Top-tier compensation expected. I don’t fit in a standard band — and that’s the point.
> Tweaks