— Founder · Quality Consultant · Testing Strategist

Christian Taeschner.

Innovation-driven test strategist and committed advisor for software quality with more than 25 years of professional experience across more than 30 software-quality-assurance projects. Technical breadth from embedded HW & SW, classic on-premise systems, mobile and desktop apps to highly complex cloud architectures.

My mission is to help companies build digital products with the highest demand on quality. Today I support clients with hands-on advisory on test strategies and test processes, take on test management leadership and back teams and managers with targeted coaching and mentoring for sustainable quality development.

Domain expertise

Where I am at home.

Artificial Intelligence

LLMs, agentic AI, AI testing

Semantic test approach, language models (ChatGPT, Claude, Gemini, Copilot), agentic AI, AI-supported test automation, LLM evaluation and governance under the EU AI Act and ISO 42001.

Automotive

Connected car, infotainment, e-mobility

Car2X, charging-station backends, cloud and on-premise ecosystems, CanOE, Vector simulation. From connectivity modules in control units to cross-vehicle test concepts.

Communications

UC, VoIP, telephony, networking

OpenScape, PBX, VoIP, CTI, call centre, SIP, trunking, network, LDAP. Long-term quality responsibility for unified-communications platforms across years of product maturity.

Platform & protocols

Mobile, web, API, data

Mobile (Android/iOS), desktop apps, web (HTML/CSS/JS), SQL, REST, MQTT, JSON, accessibility and monitoring. Cross-platform test strategies for modern architectures.

Book direct

Pick a slot that fits.

Drop a few lines about what is on your plate and book a 30 or 60 minute slot right away. The Microsoft Teams link and calendar invite land in your inbox immediately.

Duration:

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Career

More than 25 years. Nine stations. One passion: QA.

Nine stations from 25 years of software quality assurance, from embedded to cloud. Click a station to open the details. The full career timeline is available in the CV PDFs further down.

Since 10/2025

Quality Consulting Taeschner, Founder

QCT · Kranenburg, remote
  • Advisory on test strategies, quality concepts and quality-governance structures
  • AI-supported test strategies, testing of AI systems, AI compliance under ISO 42001 and the EU AI Act
  • Analysis and improvement of test processes, quality audits, workshops
  • Training and coaching formats for quality and test managers as well as for leadership
01/2024 – 06/2025

Business Development Manager

Expleo Technology Germany GmbH · Wolfsburg, Ingolstadt
  • Business development in the quality and test environment, cumulative order volume above EUR 1 bn
  • Strategic acquisition of project volume worth more than EUR 100 m with a 5-year planning horizon
  • Programme and transition management for newly won client programmes
01/2021 – 12/2023

Client Engagement Manager

Expleo Technology Germany GmbH · Wolfsburg
  • Steering of client programmes in testing, QA and digital transformation in multi-project and multi-vendor environments
  • Revenue growth of the client programme from EUR 1.3 m to EUR 4.5 m annual revenue in three years
  • Training and development of 10 test-team members into independent test managers
02/2019 – 12/2020

Senior Test Manager / Quality Consultant

Expleo Technology Germany GmbH · Wolfsburg
  • Test and defect management with a focus on connected car, backend infrastructures and after-sales
  • Design and implementation of risk-based test strategies
  • Advisory on test-process improvements, tool selection and test automation
07/2016 – 02/2019

Senior Test Manager / Quality Consultant

SQS AG · Wolfsburg
  • Test management with a focus on connected car in the focus markets Europe and China
  • Build-up of global test strategies, planning and coordination of load and performance tests
  • Steering of backend, API, frontend (mobile apps and web) tests including migration safeguarding
10/2013 – 06/2016

Head of Solution Test, SME

Unify GmbH & Co. KG · Witten
  • Test management and quality responsibility for UC solutions
  • Ecosystem, interoperability and certification tests with partners and third-party providers
  • Planning of field trials, migration and upgrade scenarios
10/2006 – 09/2013

Project Manager / Test Manager

Siemens Enterprise Communications · Witten
  • Test, release and change management for OpenScape Office / OpenScape Business
  • Leadership of national and international test teams, hot-/focal-account support
  • Planning and execution of regression, integration and system tests
06/2003 – 10/2005

Test Analyst / Test Manager

Siemens AG · Witten
  • System and integration tests for VoIP, networking and CTI solutions (HiPath 3000 / HG1500)
  • Build-up of test automation (IBM Rational Robot)
  • 3rd-level defect analysis and reproduction of error patterns
09/2000 – 05/2003

Apprenticeship — IT specialist for systems integration

Düsseldorf / Paderborn, Germany
  • Additional qualification: certified specialist for integrated systems
  • Practice in system and network administration, IT service and development
Qualifications

Methodology, management and technology.

Certified methods

Industry-recognised frameworks

ISTQB, Leading SAFe, SAFe Practitioner, IPMA, ITIL, Scrum (PSM), A-SPICE, Kanban, risk-based testing, project management (classic and agile).

Management capability

Testing, programme, client engagement

Test management, quality management, project, programme and multi-project management, client engagement, key account, transition, OLA/SLA, change management, risk management, leadership, coaching, supplier and stakeholder management.

Technical focus

Test strategy through release readiness

Test strategy and architecture, E2E/backend/API, AI-driven testing, test design, test methods, requirements management, KPI design and quality metrics, test automation, non-functional (load/performance, stability), acceptance criteria and release readiness.

Tools & platforms

Enterprise testing and modern stacks

Jira, Confluence, MS Project, Xray, Zephyr, MF ALM, OT Octane, MF UFT, JUnit, SoapUI, Selenium, Kubernetes, Docker, GitHub. AI ecosystems: LM Studio, ComfyUI, AnythingLLM. LLMs: ChatGPT (+ Codex), Gemini, Copilot, Claude (Code & Cowork).

ISTQB
Leading SAFe
SAFe Practitioner
IPMA
ITIL
A-SPICE
Project practice

Four real-world engagements.

Anonymised examples from our project work — from Connected Car migrations to AI test strategies.

Test strategy for an AI vehicle assistant — Connected Car
Case 01 · Automotive · Connected Car · AI

Quality audit and test strategy for an AI vehicle assistant

PeriodQCT — Q4/2025 – Q1/2026
RoleQuality Consultant
Structured audit and rebuild of the defect management process including a status model, classification, and escalation paths. End-to-end test strategy for non-deterministic chatbot behaviour with eval sets, guard rails, and semantic checks. Training concept to enable the quality team.
Test infrastructure management for an automotive OEM — multi-site delivery
Case 02 · Automotive · Test Infrastructure · Multi-Site Delivery

Test infrastructure management for an automotive OEM

PeriodExpleo — 2023–2025
RoleProgram Management & Service Strategy Consulting
Set-up and leadership of a technical support team for the OEM's test infrastructure management — covering operational readiness of test equipment, preparation of test environments, and a parts-and-components warehouse supplying the test centres. A JIRA-based ticket and inventory tool as the operational backbone. Stable test environments at three sites with predictable test windows.
Cross-ART test strategy for four CRM release trains
Case 03 · Automotive · CRM · Scaled Agile

Cross-ART test strategy for four CRM release trains

PeriodExpleo — 2022
RoleTest Strategy & Transition Management
Unified processes, roles, and quality gates for a CI/CD-capable test operation across after-sales, complaint management, and marketing. Transition from rudimentary legacy automation to CI/CD-based test automation with an offshore team.
Connected Car and infotainment assurance for the Chinese market
Case 04 · Automotive · Connected Car · Internationalisation

Connected Car and infotainment assurance for the Chinese market

PeriodSQS / Expleo — 2018–2023
RoleTest Management, from 2020 Delivery Management
Assurance of remote car and infotainment services across multiple vehicle platforms and models. Migration of the backend landscape from on-premise to cloud with a migration test strategy and cutover plan. Parallel test track for converting the vehicle interface from a proprietary protocol to MQTT. A workable test strategy spanning five years.
CV & documents

CV as PDF.

Interested in a personal conversation?

Whether a first call, a technical exchange or sparring on a concrete project situation — drop a line, we'll find a slot.

Get in touch
christian.taeschner@qct.de · +49 (173) 662 4446

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