java English-speaking jobs in Mainz

The Senior Business Development Manager OEM will define and execute OEM strategy, drive business development, and manage customer relationships.

Job Description Overview Techtronic Industries (TTI) is a world leader in cordless technology spanning power tools, accessories, hand tools, outdoor power equipment, as well as floorcare & cleaning products. Our focus is on end-users that range from professionals in the industrial, construction and infrastructure sectors to DIYers in home improvement, repair, and maintenance.

IT Administrator needed to manage onsite IT infrastructure, provide technical support, handle inventory, and ensure data security and compliance. Requires 3+ years of experience, strong macOS and ChromeOS administration skills, and knowledge of Jamf, Apple Business Manager, and ISO 27001. Must be fluent in German and English. Part-time, 5 days per week.

Role Overview We are currently seeking an experienced Project Manager to oversee the delivery of a 140MW / 151MWh Battery Energy Storage System (BESS) project in Dortmund. The successful candidate will manage the project throughout the full lifecycle, from detailed engineering and procurement through construction, commissioning, and handover.

• Directing day-to-day operations of one or more 24/7 stations; maintaining minimum staffing; acting as a multi-million dollar hand receipt holder; performing market research and technical budgeting for specialized gear.

The Regional Service Manager provides technical support, training, and advice to customers in the DACH region, ensuring safe operation and maintenance of equipment. Responsibilities include delivering technical training, responding to customer inquiries, overseeing the warranty program, and collaborating with the Dutch and Polish teams.

Who We Are At Peli, we engineer products that stand up to the world's toughest conditions—because the people who rely on us do too. For nearly 50 years, we've been a trusted partner for military personnel, first responders, outdoor adventurers, and innovators who push the limits.

Senior Perception Engineer to design and develop perception and multi-sensor fusion pipelines for autonomous aerial systems in challenging environments.

The Employee Feedback team supports DHL Group in measuring employee engagement and capturing the employee voice through various initiatives and tools. Key initiatives and instruments designed, developed, and managed by the department include, for example, the Employee Opinion Survey (EOS), the Great Place to Work (GPTW) survey and the Employee Feedback Suite (EFS).

Sourcing Specialist executes source-to-contract processes, initially supporting project procurement for a new laboratory and office building. Responsibilities include leading procurement projects, negotiating contracts, and ensuring compliance with regulations.

Systems Engineer to conduct avionics system tests for safety-of-flight and certification. Develop system specifications, test programs, and ground/flight test plans. Requires experience with aircraft avionics system integration and certification per EASA CS23/CS25 and CS-ACNS.

As Business Controller for IT and R&D, you will drive performance, enable strategic decisions, and shape the future of these areas. You will own budgeting, forecasting, and long-term planning, while also developing Speira's IT and R&D strategy.

The role Our client is a fast-growing developer and full-service provider of integrated commercial energy solutions, specialising in large-scale photovoltaic (PV) and battery energy storage systems (BESS) for industrial and commercial customers. The business delivers end-to-end projects, covering design, engineering, procurement, construction and optimisation.

We are seeking an experienced and strategic Senior Manager Human Resources (m/f/d) to lead the HR function across multiple locations in Germany for a global high-technology industrial company. This role is responsible for delivering a consistent, high-quality people experience while driving operational excellence, standardization and digital transformation across all German sites.

Senior Safety Engineer will support safety-related engineering activities across the project lifecycle for railway projects. Responsibilities include developing safety documentation, performing safety analyses, and supporting ETCS projects from concept through implementation. Requires a degree in a relevant field, proven experience in railway ETCS signaling projects, and strong knowledge of CENELEC safety standards.

Experienced ADR-qualified Fuel Truck Driver needed for periodic 2-week assignments on a US military installation in Germany. Responsibilities include safe fuel transportation, loading, unloading, and adherence to safety regulations.

Shaped over the past 25 years by an entrepreneurial, disruptive spirit, SERB combines the focus and agility of a biotech with the scale, reach, and reliability of a global pharmaceutical company — always grounded in medical purpose, not corporate convention.

Manages project costs, ensures budget adherence, and identifies cost-saving opportunities. Develops project plans, schedules, and resource allocation. Tracks project progress, resolves construction issues, and ensures compliance with safety, quality, and environmental regulations.

Leads the R&D, process, and application development organization in Leuna, Germany. Provides leadership and direction for researchers, owns capacity planning, and steers work toward business value and growth opportunities. Drives cross-project execution, influences stakeholders, and owns budget responsibility for laboratory facilities.

Senior Environmental Sustainability Manager will drive the implementation of environmental management requirements across the organization. This role supports countries in managing environmental risks, compliance obligations, and mitigation programs. The position serves as a key link between Group Sustainability and the global network of environmental professionals.