Senior IT Security Manager

Cosuno

6d • Hybrid

About The Position

You'll take full ownership of information security, compliance, and IT governance at Cosuno. You'll build and run our ISMS, lead us through ISO 27001 certification, and become the face of Cosuno's security posture toward enterprise customers and auditors. This is a senior individual contributor role with genuine end-to-end ownership. You won't be managing a team. You'll be the expert doing the work, backed by an Engineering team that implements technical changes you define, and with direct sponsorship from the CTO.

Requirements

• Full professional fluency in German and English.
• Deep, hands-on ISO 27001 experience. You've built or run an ISMS before, ideally leading a company through certification. You know the Annex A controls and how companies actually implement them, and you can talk to an auditor without a script.
• Operational GDPR expertise. You can draft a DPA, you know your Art. 28 from your Art. 32, and you've handled subprocessor management, vendor reviews, and DSARs in practice.
• Genuine technical literacy. You understand how a modern SaaS product is built and run (cloud infrastructure, CI/CD, SaaS tooling). You can read an architecture diagram, ask engineers the right questions, and write a System Development Policy that matches reality.
• Fluency with AI tools in your daily work. You already use tools like Claude, Claude Code, or similar as a core part of how you get things done, whether that's drafting a policy, working through a questionnaire, or automating a recurring task. You see AI as a force multiplier for a one-person function, and you're eager to push it further.
• Independence in front of customers. You're comfortable being the sole security counterpart in an enterprise audit or a customer CISO call.
• The organisational maturity to run multiple threads in parallel: a certification project, an audit, three questionnaires, and a DPA negotiation, without things slipping.

Nice To Haves

• ISO 27001 Lead Implementer / Lead Auditor certification, or CIPP/E
• Experience with compliance automation tooling (Kertos, Vanta, Drata, Secfix, or similar)
• Experience building your own automations with AI (agents, scripts, or workflows for questionnaires, evidence collection, or vendor reviews)
• Experience administering an MDM / IdP (JumpCloud, Okta, Jamf, or similar)
• Experience with other frameworks relevant to our customers (SOC 2, TISAX, BSI C5, NIS2)
• Prior experience at a B2B SaaS company selling to enterprise customers

Responsibilities

• Lead our ISO 27001 certification from gap analysis through audit, and run the ISMS afterwards: risk management, Statement of Applicability, internal audits, management reviews, and the annual control cycle
• Write and maintain our security policies, making sure they describe how we actually work rather than how a template says we should
• Own responses to enterprise security questionnaires and RFIs, helping Sales close deals faster
• Represent Cosuno in supplier audits by enterprise customers: you'll face customer CISOs and auditors independently, in German or English as needed
• Own the operational side of GDPR: drafting and negotiating DPAs (AVVs), managing our subprocessor list and notifications, running vendor security reviews, and supporting DSARs
• Work with our external counsel and DPO where legal depth is required, while handling the day-to-day yourself
• Own our identity and access management via JumpCloud (MDM, SSO, device policies), including joiner/mover/leaver processes and periodic access reviews
• Define our IT security baseline: device hardening, SaaS tooling governance, security awareness training

Benefits

• Competitive compensation: A salary above the market average, reflecting the seniority of the role.
• Work-life balance: Work 100% remotely or from our modern office in Berlin, with flexible working hours.
• Top-notch equipment: A new MacBook Pro to ensure you have the best tools for the job.
• A great team: Regular company off-sites and team events that connect us as people, not just colleagues.
• Job security: A permanent contract in a stable, well-funded company.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed