Senior Technical Sales Manager-BESS (Polish Speaking) - All genders

• Job offer expiration: 25/12/2026
• Type of work: Hybrid
• Role: Individual Contributor / Specialist
• Location: Europe, Poland

Technical Sales Proposal Management

• Lead the technical aspects of customer RFQs, translating customer specifications into technically compliant and competitive BESS solutions.
• Prepare and coordinate technical bid packages, including system configurations, technical specifications, scope of supply, single-line diagrams, and interface definitions.

Pre-Engineering & Solution Definition

• Lead technical pre-engineering activities by translating customer requirements into clear system configurations, scope of supply, and interface definitions, ensuring alignment between solution design, cost targets, and delivery feasibility.
• Perform preliminary BESS plant-level sizing and configuration based on customer requirements, including power capacity (MW), energy capacity (MWh), storage duration, and operating profiles.

Costing & Quotation Support

• Support the development of system cost structures and quotation inputs by aligning technical solutions with cost assumptions, identifying optimization opportunities, and ensuring competitiveness through standardized and simplified designs.

Grid Connection & Grid Code Compliance

• Assess grid connection requirements and technical compliance for BESS projects, with particular emphasis on Polish grid codes and TSO/DSO requirements.
• Support customers and EPC partners in understanding grid connection procedures, technical conditions, and compliance requirements.

Must-Haves:

• Degree in Electrical Engineering, Power Systems Engineering, or a related technical discipline.
• Proven experience in technical sales, application engineering, solution engineering, or pre-sales engineering within BESS, renewable energy, or electrical power infrastructure.
• Practical experience in BESS plant sizing and preliminary electrical system design, including MW/MWh calculations, PCS selection, and MV/HV system configuration.
• Strong understanding of Polish grid connection procedures, grid codes, and technical requirements applicable to BESS and renewable energy projects.
• Experience working with Polish grid operators (TSO/DSOs), either directly or through grid connection and compliance activities.
• Solid knowledge of MV/HV electrical systems, grid connection architecture, protection concepts, and power system fundamentals.
• Ability to interpret customer technical specifications and translate them into optimized system configurations and technical proposals.
• Experience preparing technical documentation, specifications, and proposal packages for customers and EPC partners.
• Strong communication and stakeholder management skills, with the ability to explain complex technical solutions clearly.
• Fluent Polish and professional proficiency in English, both written and spoken.
   

Nice-to-Haves:

• Direct experience with utility-scale BESS projects, including AC-coupled system architectures.
  Familiarity with Polish TSO (PSE) and relevant DSO grid connection requirements and approval processes.
• Understanding of grid-forming/grid-following inverter technologies, reactive power control, frequency response, and other grid support functionalities.
• Experience with power system simulation and engineering tools such as DIgSILENT PowerFactory, PSS®E, ETAP, or equivalent.
• Knowledge of European grid connection standards, including EN 50549 and applicable EU network codes.
• Familiarity with BESS plant controllers, EMS/PPC, SCADA, and cybersecurity considerations.
• Established technical relationships with Polish utilities, developers, EPC contractors, or engineering consultants.
• Experience supporting technical optimization and value engineering of BESS projects.

Location:

Location for this role is flexible and the position can be based in one of our offices in Poland, or operate as a home-based role in Poland depending on the candidate profile.

How to Apply:

Ready to help shape the next phase of utility-scale energy storage in Poland and Central & Eastern Europe?

Apply now and join KK Group in building a scalable BESS business with real market impact.

Interviews will be scheduled on an ongoing basis.

By joining KK Group, you will be part of a culture where diversity is embraced, every nationality is respected, and trust and collaboration across perspectives drives our success. Across our global organisation, we offer a wide range of job opportunities spanning office-based roles, production facilities, and onsite positions worldwide. Our roles cover multiple functions, locations, and disciplines, providing diverse career paths across the business. Whether you’re interested in engineering, manufacturing, operations, or support functions, you’ll find opportunities at KK Group to grow your skills, contribute to meaningful work, and make an impact.