Service · Strategy · Technology

Connections
that make an impact.

Senior Service Manager B2B with more than 20 years of experience in telecommunications, customer development and the optimization of complex service processes.

Making complexity
easy to grasp.

I combine strategic thinking with hands-on execution – for stable customer relationships, reliable services and processes that work in everyday operations.

My experience ranges from B2B sales and key account management to my current responsibility for demanding service and escalation processes. Customer orientation, analytical thinking and a willingness to apply new technologies sensibly help me along the way.

20+Years of B2B experience
360°Sales & service perspective
01Reliable point of contact

A career with
substance.

From a commercial foundation to strategic service responsibility.

01
11/2022 — present

Senior Service Manager B2B

Telefonica Germany GmbH & Co. OHG

Strategic support and development of selected enterprise customers. Responsibility for complex service processes, escalation management for major incidents, and KPI and SLA reporting at management level.

02
04/2017 — 10/2022

Service Manager B2B

Telefonica Germany GmbH & Co. OHG

Hands-on support of business customers, analysis of customer requirements and support in incident and escalation management. Optimization of service and quality processes.

03
11/2012 — 03/2017

Service Manager B2B

E-Plus Mobilfunk

Service responsibility for business customers with a focus on escalation and incident management.

04
08/2005 — 10/2012

Sales Manager Direct Sales (B2B, SME)

E-Plus Mobilfunk

New customer acquisition, growth of existing customer relationships, advice on telecommunications solutions as well as contract negotiation and closing responsibility.

05
11/1997 — 07/2005

Earlier positions

  • 05/2005 — 07/2005
    Branch ManagerIntertemp Personaldienstleistungen
  • 02/2003 — 04/2005
    Senior Staffpersona service, Düsseldorf
  • 11/1997 — 01/2003
    Senior StaffEbing Maschinen- und Gerätemarkt / Werkstatt Technik, Bottrop

What I
bring.

My drive comes from combining customer focus, process understanding and technical curiosity.

01
Customer Relationship Management

In business-customer care since 2005: from new customer acquisition in direct sales to strategic support of selected enterprise customers.

02
Service & Quality Management

Responsibility for complex service processes and optimization of service and quality processes in the B2B environment.

03
Escalation & Incident Management

In escalation and incident management for business customers since 2012, today including major incidents.

04
Enterprise & Key Account Management

Strategic support and development of selected enterprise customers, building on experience in B2B sales (SME).

05
KPI and SLA Reporting

Reporting on key figures and service levels at management level, part of the responsibility for enterprise customers.

06
Process Optimization & Data Analytics

Optimization of service and quality processes; further training in data analytics and business intelligence (IBM, 2025).

07
Generative AI & Digital Processes

Eight IBM certificates in generative AI (2025) and hands-on use in my own Rasurapp, an AI-assisted PWA.

Knowledge
that moves.

08/2025

IPMA® Level D

IPMA – International Project Management Association

01/2025 — 03/2025

Generative AI: eight certificates

IBM, including Generative AI for Data Analysts, Generative AI for Business Intelligence (BI) Analysts, Generative AI Fundamentals, Prompt Engineering Basics

09/1997 — 12/2001

Dipl.-Inform. (German university degree)
Computer Science (Business Informatics)

FOM University of Applied Sciences, Essen

1992 — 1995

Abitur

Evening grammar school (Abendgymnasium), Essen

07/1989 — 07/1992

Retail Merchant (IHK)

Küchen-Center Altmeier, Bottrop

Curiosity turns
into something real.

My passion for classic wet shaving gave rise to Rasurapp: a bilingual, offline-capable PWA with a SOTD diary, inventory management, wiki, glossary and community links.

For me, vibe coding is the practical, AI-assisted path from an idea to a working application: sharpening requirements, building first prototypes, testing and developing them further with purpose. In doing so, I combine generative AI with product thinking and my own software development – for fast learning loops and solutions that deliver real everyday value.

Open Rasurapp ↗
Wet shavingRasurappVibe codingGenerative AIPrototypingTechnology

Ready for the next step?

Let’s stay
connected.

gross@marcel-gross.de ↗

LinkedIn profile ↗