Sales Consultant Fixed and Connectivity

About Proximus Luxembourg

Proximus Luxembourg is a leading historical player in the ICT & Telecoms markets. Proximus Luxembourg addresses both residential and business markets through its commercial brands Tango, Proximus NXT and more recently Codit.

With PSF support status, the company has almost 750 employees. All these experts share a passion for digital technology, a spirit of openness and innovation, and a desire to simplify, connect and make their customers' personal and professional activities ever more secure.

Proximus Luxembourg is actively contributing to the acceleration of Luxembourg's digitalisation and its economic influence through the development of connectivity, resilient infrastructures and 5G, as well as innovative technologies such as Blockchain, Artificial Intelligence, Machine Learning and IoT.

Proximus Luxembourg is a subsidiary of the Proximus group (Euronext Brussels: PROX), provider of digital services and communication solutions operating in the Belgian and international markets.

Your mission :

As a Presales Engineer, you will support our Sales organization by:

Preparing, presenting, and positioning our telecom solutions especially enterprise connectivity, fiber‑based internet access, and wide‑area networking services.

Providing clear and accurate responses to commercial and technical customer inquiries.

Assisting account managers and business developers in the preparation of bids, RFP responses, and complex solution proposals.

General Responsibilities

Prepare quotations, proposals, solution descriptions, and statements of work for fixed and mobile telecommunications services, including enterprise connectivity, IP networking and managed solutions.

Analyse customer requirements and assess existing infrastructures, covering mobile services, fixed access, WAN architecture, and network performance.

Identify opportunities and contribute to the design of technical solutions aligned with customer needs.

Recommend standardized service packages or design tailored architectures when required.

Build P&L views to ensure all solutions meet internal profitability expectations.

Develop or improve internal tools to streamline presales activities and enhance operational efficiency.

Participate in internal and external training programs to maintain strong knowledge of product evolution and emerging technologies.

Extended Technical Scope

You will also be responsible for presales activities related to advanced transmission and connectivity technologies, including:

• Fiber-optic connectivity solutions, including DWDM, CWDM, and optical transport architectures (OTN).
• Enterprise WAN services such as MPLS, SD‑WAN, IP VPN, Ethernet VPN, and hybrid WAN designs.
• High-availability access architectures, including redundant routing, dual‑homing, SLA‑driven designs, and business continuity strategies.
• Cloud connectivity solutions (Azure, AWS, GCP), remote access technologies, and managed network security concepts.
• High-level assessments of customer networks covering capacity, latency, routing, quality of service, and resilience.

Additional Responsibilities

Design and validate enterprise network architectures using fiber, optical transport, MPLS, and SD‑WAN technologies.

Translate complex technical architectures into clear, customer‑focused commercial proposals and presentations.

Support technical workshops, deep‑dive sessions, and architecture reviews with customers.

Collaborate with engineering and operations teams to validate feasibility, capacity planning, and deployment constraints.

Monitor technological trends to enhance solution relevance and strengthen competitive positioning.

Your profile :

• Academic background in business, engineering, economics, commercial sciences, management, or marketing.
• Sound understanding of the telecom and enterprise network market.
• Experience in presales engineering; experience selling telecom or ICT solutions is an advantage. Motivated recent graduates are welcome.
• Ability to design architectural diagrams, high‑level network topologies, and project plans.
• Excellent presentation, communication, and customer‑facing skills.
• Strong analytical, organizational, and follow‑up capabilities.
• Creativity, entrepreneurship, and a proactive, solution‑oriented mindset.
• Customer‑centric approach with strong influencing skills.
• Strong team spirit combined with accountability and ownership.
• Ability to interact confidently with senior business stakeholders and technical experts.
• Strong negotiation skills.
• Excellent written and spoken French and English; Luxembourgish or German are an asset.

Our offer :

A professional and stimulating work environment in the IT & telecom sector. Multiple career opportunities within the Proximus Group at national and international level, cutting-edge training in new technologies, a wealth of recognized expertise. We also offer an attractive salary package and many other benefits.

Our company is an equal opportunity employer, valuing diversity in all its forms. We firmly believe that each individual brings a unique richness to our teams, and we are committed to creating an inclusive environment where every voice counts.

If at the end of the process your application is successful, you will be asked to provide an extract from your criminal record. Your personal information will be handled in compliance with applicable data protection laws.