Customer Success Engineer
3E
Company Overview
3E (3E NV)
HeadquartersBrussels, Belgium
Founded1999
SizeApproximately 100-150 employees (source: devex.com). No public revenue figures available for 2023 or later.
What They Do
3E focuses on solar energy, wind energy, battery energy storage systems (BESS), sustainable buildings, sites, energy infrastructure, and energy markets. The company offers SaaS platforms and consulting services throughout the entire lifecycle of renewable projects, from development to operation (source: devex.com). Their flagship product, SynaptiQ, is a SaaS platform launched in 2010 that optimizes over 20 GW of connected capacity and provides advice on 90 GW of assets in 2023 (source: 3e.eu). This platform offers performance analytics, proactive monitoring, ROI recommendations, and multi-stakeholder reporting, and is designed for PV, wind, and BESS portfolios.
Projects & Track Record
3E has supported renewable projects in over 40-60 countries with a track record of more than 20 years. A notable project includes optimizing an 800 MW wind portfolio for Renovatio in Eastern Romania through customized measurement campaigns (source: 3e.eu). For Opdenergy in Spain, 3E provided regulatory and technical guidance for hybridizing existing installations with BESS and renewable energy (source: 3e.eu). Ongoing efforts include a partnership with RJE for performance management in Spain and collaborations such as digitizing ReNew Power's 4,100 MW wind/solar portfolio in India via SynaptiQ.
Recent Developments
In 2023, 3E achieved milestones of 20 GW of connected capacity in SynaptiQ and 90 GW of advised assets, and opened an office in Spain (source: 3e.eu). A strategic partnership with BayWa r.e. was announced for global monitoring of PV portfolios using SynaptiQ, focusing on operational excellence across 10 GW of assets (source: baywa-re.com). In 2024-2025, 3E collaborated with TGS on integrating Virtual Met Mast technology into Wind AXIOM for improved wind farm planning.
Working at 3E
3E offers positions in engineering (wind/solar/BESS modeling, system engineering), software/data analysis (development of SynaptiQ, AI solutions), consulting (due diligence, feasibility, project management), and more, with a multidisciplinary team of about 100-150 experts (source: 3e.eu). Active recruitment is taking place at the headquarters in Brussels and at key locations such as Barcelona, Paris, and Cape Town, reflecting the expansions in these regions. The culture emphasizes innovation, international collaboration, and long-term customer relationships, as noted by co-founder/CTO Werner Coppye.
Last updated on Feb 23, 2026 | Report an issue
Job Description
As a Customer Success Engineer, you will play a pivotal role in managing the end-to-end customer journey. Your responsibilities will range from overseeing the onboarding of new clients to managing the ongoing success of mature accounts. This role demands a proactive approach to account management, issue detection, and continuous platform and service improvement.
Your responsibilities will be:
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Account Management
- Manage 5 to 15 mature customer accounts simultaneously, monitoring their KPIs and periodically evaluating their success and value from SynaptiQ.
- Maintain and build long-term relationships with customers, ensuring their ongoing satisfaction and aligning services with their business goals.
- Identify opportunities for upselling and cross-selling, enhancing customer engagement and value.
- Define and report on success metrics for each account, including customer satisfaction scores, retention rates, and revenue generated from upselling.
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Issue and Opportunity Detection
- Continuously monitor the health metrics of our customer base to identify critical patterns.
- Proactively address potential issues and identify opportunities for further engagement and improvement.
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Client Onboarding
- Manage 1 to 3 onboarding projects at a time, tailoring the process to meet each client's unique needs and guiding them towards becoming a mature customer.
- Ensure a seamless and effective integration of new clients onto the SynaptiQ platform.
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Training and Webinars
- Conduct comprehensive training sessions and webinars for clients to ensure proficient use of the SynaptiQ platform.
- Develop user guides and training materials tailored to client needs.
- Foster customer advocacy by creating case studies, testimonials, and facilitating customer references that highlight the success and value of our platform.
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Collaboration and Continuous Improvement
- Work collaboratively within the Customer Success team and with other teams, including Presales, Support, and Development.
- Contribute to the ongoing growth and improvement of the platform and services.
Requirements
To successfully fill this role, we are looking for someone with:
- A Master's degree in Engineering, or a related field.
- Minimum 2 years of experience in a customer-facing role, ideally in a high-growth environment.
- Proven track record of managing customer relationships and ensuring customer success.
- Strong analytical skills with a focus on KPIs and customer metrics.
- Full professional proficiency in English, with additional languages such as Dutch or French being a bonus.
- A commercial mindset, balanced with the ability to manage hands-on work and strategic projects.
- A proactive, results-driven attitude with a strong "get things done" mentality.
- Exceptional personal attributes, including empathy, patience, excellent listening skills, and the ability to remain calm under pressure.
Bonus points for:
- Experience in the energy industry (particularly solar, wind, or storage).
- Proficiency in CRM or customer success software such as Salesforce, HubSpot, Gainsight, etc.
Benefits
Our offices are hidden in the centre of Brussels with a view on a pond, with ducks and a heron bringing a regular visit. In addition to a stimulating atmosphere in a highly motivated group of people, 3E offers a unique opportunity to further develop yourself in a company/team with an ambitious growth plan, delivering innovative services.
Furthermore:
- Training on the job by our experts so you get to know our solution and work in and out.
- Flexibility in our open-minded company.
- Home working (2 days per week).
- An international environment: projects in over 100 countries worldwide, colleagues of over 30 nationalities.
- Investment in your growth with many soft & hard skills training opportunities.
- A salary package including hospitalisation insurance, pension saving, €9 meal voucher/day, flexible income plan, 20 legal days off + 12 compensation days (per full year worked), sustainable transport subscription or bike allowance (€0.36/km).
Apply now
Job expired?Please let 3E know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
Apply now
Job expired?Please let 3E know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
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About the role
August 20, 2026
August 20, 2026
Full time
Hybrid
Company
Solar Energy, Wind Energy, Energy Storage
- Brussels, Belgium
Minimum 2 years in a customer-facing role
UTC+01:00