Pre-Sales Engineer Infrastructure & IP Telephony (M/F)

Informadis | Les Ulis (91) | Permanent Executive Contract | 50–60 K€ package | National travel

Who are we?

INFORMADIS is the IT partner for the E.Leclerc network. We support member stores and their regional cooperatives (SCA) in their IT projects: IP telephony, network and security (firewalls, switches…), datacenter hosting, Space X accounting software, IT hardware, printing, and managed services / helpdesk.

Our projects range from a single store to multiple sites deployed simultaneously. To support this growth, we are strengthening our pre-sales team.

The position

Reporting to the Sales Manager, you are the bridge between sales and technical teams. You transform the need of a store or a regional cooperative into a concrete, costed, and convincing solution. You will be involved in the entire infrastructure scope (network and security, IP telephony, hosting), from a single store to multi-site networks, from the initial visit to production handover.

Your missions

Needs gathering and analysis

• Qualify opportunities with sales representatives: scope, number of sites, stakes, budget

• Audit the existing network (LAN/WAN, operator links, Wi-Fi, security), telephony, equipment, and hosting

• Meet with store managers, IT managers, and cooperatives

• Identify technical risks: cabling, operator links, end of PSTN, equipment compatibility

Network and security design

• Design LAN/WAN architectures for stores and multi-site networks: interconnection, VPN, SD-WAN, link redundancy

• Define segmentation (VLAN) and addressing plan

• Recommend firewalls (Fortinet or equivalent), filtering rules, and secure remote access

• Size switches (PoE) and Wi-Fi coverage

• Integrate cybersecurity into every proposal

Telephony design

• Design the telephony architecture: on-premise or hosted IPBX, SIP trunks, DDI, number portability, IVR, DECT

• Ensure voice quality of service: QoS, traffic prioritization

• Support migration from PSTN to IP (end of copper network)

Hosting and costing

• Define business application hosting in the datacenter

• Size and cost the solution: hardware, licenses, links, services

• Propose alternative scenarios (purchase or managed service, standard or optimized)

Writing and presentation

• Write technical proposals, architecture documents, and responses to tenders

• Present and defend solutions during presentations, alongside the sales representative

• Contribute to offer standardization

Production handover and monitoring

• Hand over a complete file to project managers and technical teams

• Anticipate the cutover plan to limit impact on store operations

• Monitor end of copper, cybersecurity, SD-WAN, and cloud trends

Candidate profile

• Bachelor's to Master's degree in IT, networks, or telecommunications, or equivalent experience

• 5 to 10 years of experience in pre-sales, solution engineering, or integration (IT service company, integrator, telecom operator)

• Network and security: LAN/WAN, VLAN, routing, VPN, QoS, firewalls (Fortinet preferred), switches, Wi-Fi

• IP Telephony: IPBX (Asterisk, 3CX, Alcatel, or equivalent), SIP, DDI, number portability, IVR

• Ability to size a solution and produce reliable costing

• Appreciated: SD-WAN, virtualization, SaaS/cloud, vendor certifications

• Experience in large retail or a multi-site network is a significant plus

• You can simplify complex information: you explain equally well to a CIO as to a store manager

• Driver's license B, national travel

Key skills

Pre-sales · LAN/WAN Network · Security / Firewall · IP Telephony · SIP / IPBX · Costing · Technical writing · Teaching ability · Commercial acumen

What we offer

• Permanent Executive Contract (CDI), executive status

• 50–60 K€ package depending on profile

• Smartphone (iPhone or Samsung, choice) and laptop

• Health insurance 100% covered

• Meal vouchers

• Gratification bonus and profit-sharing bonus

• 1 day of remote work per week after the trial period

• Les Ulis (91)

Does this position suit you? Apply directly or contact us via private message.

Find Jobs in France on Arbeitnow