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Sales Engineer (w/m/d) - Battery Energy Storage Systems (BESS)

Technopark Lucerne, Switzerland

PHENOGY AG is a leading innovator of battery energy storage technologies and solutions for the green electrification of the planet. Our team members work on future-proof and sustainable battery systems that are powerful, safe, and robust – with circularity as a central principle. Our technology partner network spans leading battery research institutes. PHENOGY is an environmentally and socially conscious enterprise. We are committed to fostering prosperity for the people and our planet, ensuring sustainable growth – starting in the area of our greatest expertise and impact: energy storage solutions.

We energize the future.

PHENOGY is seeking curious, entrepreneurial-minded energy pioneers to help shape our vision, systems, and growth; playing a key-role as we launch into our ambitious future. If you’re inspired by our mission, values, and drive to change how we energize the future — we’d love your application.

As we move from a dynamic start-up into an ambitious scale-up phase, we're looking for a customer-oriented, technically strong Sales Engineer for Battery Energy Storage Systems (BESS) to help accelerate our commercial growth. In this role, you act as the technical counterpart to customers and partners within the sales team — translating complex requirements into commercially attractive, technically feasible BESS solutions, and helping position PHENOGY's sodium-ion battery technology in a competitive, fast-moving market.

You'll work closely with Product, Engineering, R&D, and Operations to ensure customer needs, technical feasibility, and commercial value are aligned — from first consultation through to proposal stage.

Your Tasks & Responsibilities

  • Customer & Technical Sales
    • Be the technical expert as part of the sales team throughout the sales cycle for PHENOGY's BESS solutions
    • Analyze customer requirements and translate them into technically and commercially viable solution concepts
    • Present technical solutions and communicate their value to customers and partners
  • Solution Engineering & Proposal Development
    • Design customized BESS solutions and support the preparation of technical and commercial proposals
    • Conduct load profile analyses, business case assessments, and ROI calculations
    • Support tender, RFP, and customer qualification processes
  • Internal Coordination & Market Feedback
    • Collaborate closely with Engineering, R&D, Product Management, and Operations
    • Ensure proposed solutions are feasible, scalable, and aligned with internal capabilities
    • Provide customer and market insights to support continuous product improvement

Must have’s

  • Bachelor’s degree in Electrical Engineering, Energy Technology, Mechanical Engineering, Industrial Engineering, Physics, Chemistry, Materials Science, or a related technical field
  • At least 3 years of experience in technical sales, solution engineering, sales engineering, application engineering, project engineering or a similar customer-facing technical role
  • Strong technical understanding of battery systems, power electronics, energy storage, renewable energy systems, industrial energy infrastructure or similarly complex technical products
  • Experience with customers or applications in at least one of the following areas: BESS, PV / solar systems, EV charging infrastructure, UPS, switchgear, power electronics, grid infrastructure, industrial energy systems or complex engineered products
  • Ability to explain complex technical topics clearly to customers, sales colleagues, and internal technical teams
  • Strong commercial mindset and ability to connect technical features with customer value, business cases and buying decisions
  • Fluent in German and English

Nice-to-have’s

  • Direct experience in battery technology, BESS, sodium-ion, lithium-ion, power conversion systems or grid-connected storage applications
  • Experience in  selling for industrial, commercial, utility, grid operator or infrastructure customers
  • Familiarity with PV/Solar. EV Charging infrastructure, UPS, switchgear, or grid infrastructure
  • Experience preparing technical proposals, RFP responses, or feasibility/ROI assessments
  • Comfort operating in an early-stage, scale-up or high-growth technical environment
  • Existing network in renewable energy, e-mobility, energy infrastructure, or industrial power systems 
Location: Technopark Lucerne, Switzerland, or Bremen, Germany
Travel readiness: Regular customer and site visits within Germany and Switzerland, depending on business needs
Reports to: Head of Sales – EMEA

We offer you:

  • Join a high-caliber environment that enables you to develop your full potential, shape your job, and take ownership.
  • Participate in the development of PHENOGY and inspire the world to transition to sustainable energy.
  • Become part of our eco-passionate expert team - a first-class team all around. 
  • Benefit from flexible work hours as well as remote and on-site working in a modern sustainable office
  • Enjoy various events, an amazing coffee machine, and the occasional coffee from our CEO (acting Barista)

At PHENOGY, we highly value diversity, equality, and inclusion. It makes our company stronger. Our philosophy: one mindset, many minds.

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