Temporary Senior HR Generalist

Coherent Corp. is the global leader in photonics, empowering innovators to shape the future with breakthrough technologies, from advanced materials to complete laser and optical systems. 

Our solutions impact industrial, communications, electronics, and instrumentation markets, helping customers overcome complex challenges and unlock new possibilities. 

Headquartered in Saxonburg, Pennsylvania, we operate worldwide, offering an international, collaborative environment where research, manufacturing, and customer-focused teams drive innovation and deliver real-world results.

Why Järfälla?

Coherent Järfälla is where cutting-edge photonics meets everyday teamwork. Home to Sweden’s only full-scale indium phosphide (InP) wafer fab, we design, produce, and test some of the world’s fastest optical chips – all under one roof. 

Our engineers don’t just design technology; they see it move from wafer to finished product, powering data centres, AI infrastructure, and global communications. With around 300 specialists on site, strong continued growth, and ongoing investment in people and equipment, Järfälla offers real impact, collaboration, and long-term career development in a high-tech environment. 

Location: Järfälla | Hybrid: 3 days on-site per week | Employment type: 1 year fixed-term contract

Do you want to work in a global company with high ambitions? We are now looking for a Senior HR Generalist who wants to help build sustainable HR structures in an international organization experiencing strong growth.

About the role

In this role, you will be part of the HR team in Sweden. You will work closely with the business in a dynamic and international environment, supporting managers locally while collaborating with global functions. The role combines operational HR work with the development of processes that create stability and support the business. HR plays a key role in the company’s growth journey by attracting, developing, and retaining skills and talent.

Your responsibilities: 

• Act as a business-oriented and trusted HR partner to managers
• Lead and participate in union negotiations
• Coach managers in leadership, labor law, and people-related matters during change
• Handle employee relations cases in an international and fast-paced environment
• Be responsible for contact with the payroll provider and ensure efficient and accurate payroll processes
• Work with Compensation & Benefits and handle some payroll administration
• Manage HR administration such as drafting contracts, registering data in HR systems, and reporting
• Participate in recruitment processes
• Build and develop processes and ways of working that meet both local and global requirements
• You are structured, solution-oriented, flexible, and comfortable with change

Who we are looking for

• You have min 7 years of experience in a broad HR role
• You are confident in union relations and negotiations
• You communicate fluently in Swedish and English, both spoken and written
• You have strong skills in the Microsoft Office suite (especially Excel, Word, and PowerPoint)
• You thrive in an international context and enjoy collaborating across borders
• You have a coaching approach and a clear business focus
• You are structured, solution-oriented, flexible, and comfortable with change

Why you will enjoy working with us

• You will be part of a global company with strong growth
• You will have an important role with significant responsibility and trust
• You will have the opportunity to help shape HR in an international environment
• You will work closely with managers, leadership, and global functions
• You will be met by high engagement, strong expertise, and great opportunities
• You will be offered benefits such as health care benefit, health care insurances, massage at work and bonus programs.
• We are covered by a CBA

Current employees who wish to apply should submit a cover letter detailing their interest in the position and how their skills and experience align with the requirements of the role.

Applications for this tole close COB on Monday, 23 February 2026.If you require any a