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About us

Directly with the founders.

You book Gabriel and Ioannis and work directly with the founders. A single point of contact, from pitch to go-live.

Gabriel Mandtler & Ioannis Tsarmantidis · Founders

Company profile

Specialist B2B consulting for AI automation and SAP data migration.

Company
MGTI Consulting GmbH
Founders
Gabriel Mandtler and Ioannis Tsarmantidis
Founded
2026
Area served
DACH
Languages
German, English
Focus areas
  • AI automation
  • SAP data migration (S/4HANA)
  • AI-Audit as the entry point
Typical client contacts
  • Managing directors
  • IT leads
  • Commercial leads
  • SAP programme leads
The team

Two founders. One standard.

What you see here is the entire team. You reach us directly and work with the same people who deliver: from the first sketch into productive operation.

2 founders · 1 point of contact · pitch → go-live
Gabriel Mandtler

Gabriel Mandtler

AI AutomationBuilderAudit Background
Claude Code · n8n · RAG & MCP · Voice AI · Self-Hosted LLM

Builds AI agents, automation workflows and custom tools for Operations and Sales, from lead pipelines to RAG knowledge bases, voice agents and internal dashboards. Together with Ioannis: set up our own AI server, where we run language models and the knowledge base in-house. Before that, 5+ years at PwC in Risk Assurance and Finance Transformation: S/4HANA go-lives, IT audits under ISA 315 (Revised) covering access management, change management, computer operations and program development, as well as contributing to ISAE 3000 engagements for ERP implementations. That is where the focus on traceability and control in regulated enterprise settings comes from.

Ioannis Tsarmantidis

Ioannis Tsarmantidis

SAP Migration DepthServer Infra
Migration Cockpit · SAP Data Services · HANA SQL · Docker / K8s · Power BI

Four completed SAP S/4HANA go-lives at four companies, all as an independent consultant before founding.

Our stance

We come from two worlds: the audit world, where every claim has to be evidenced. And the engineering world, where a system only counts once it's in production. 9+ years of combined experience in both have left us with two convictions.

01

Recommendations need evidence.

Every use case gets a baseline (time, cost, error rate) that we hold ourselves to.

02

Trust is built at go-live. Not in the workshop.

That is why the team that advises stays the team that implements, from the first sketch to production.

Three steps: Identify, Build, Embed. Each with a clear outcome and a documented transition until your setup runs on its own.

Our methodology in detail

Audit depth meets AI speed.

Four principles shape how we deliver: AI as the foundation, agents around the clock, short measurable iterations and documentation aligned with the questions your auditor will ask.

Build · Audit · Deliver.

Gabriel Mandtler & Ioannis Tsarmantidis · Founders

Why us

Four things you can verify.

4
S/4HANA go-lives at four companies
ⓘ
Context
Four completed SAP S/4HANA go-lives, all as an independent consultant before MGTI was founded.
9+
years of experience across the audit and engineering worlds
9
SAP modules in migration practice
ⓘ
Context
FI · CO · MM · SD · PP · EWM · AA · QM · BP
4-8
weeks to a productive first solution
ⓘ
Context
Our target corridor for the first productive solution. We measure your baseline first, then calibrate against it.

We document so the evidence an audit under IDW PS 850 (concurrent project audit) and ISA [DE] 315 (risk assessment, including the IT environment) requires is in place. MGTI is not an audit firm: we do not perform audits and we issue no attestations.

Our own server in detail
Let's talk

Ready to automate your first processes, or deliver your SAP migration safely?

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Answers straight from the founders · DE · EN