Job Advertisement: Researcher in Mobile Networks

The Total Defence Research Institute (FOI) is a government agency conducting world-leading research in defense and security to support Sweden's military and civil defense. The research spans several areas, such as underwater, cyber defense, space, electronic warfare, sensor systems, civil defense, CBRNe (chemical, biological, radiological, nuclear, and explosive materials), military platforms including weapons and protection, as well as security policy analysis. FOI's research plays a key role in building Sweden's defense capability.

Would you like to work with advanced applied research and development in a dynamic workplace at the forefront of technology? Then FOI could be your new workplace! We offer a balanced work life, a developing work environment, and a socially important job!

About the Position

The Swedish Armed Forces now use mobile networks to a greater extent than before. To utilize civilian communication systems in a military context, knowledge of the strengths and weaknesses of these systems compared to military requirements, such as resilience and uninterrupted service, is required. Our assignments require increased knowledge of mobile networks, particularly 4G and 5G, covering everything from the physical layer's construction to how a core network reacts to deliberate interference. Our focus is twofold: how we use mobile networks in the most appropriate way and how a mobile network can be degraded by an adversary.

You will contribute your knowledge to applied research projects to identify strengths and weaknesses in today's and tomorrow's mobile networks to ensure robust functionality within the military defense.

The work is project-based in collaboration with other researchers both within and outside FOI. You will participate in dialogues with our clients and communicate results from completed activities. Our projects are relatively small, making your contribution a vital part of the whole, and you will have a significant opportunity to influence project outcomes. You will have good opportunities to follow your idea from sketch to finished system while also being able to follow academic research in your field. If you want to take on more responsibility, we are in a long growth phase, and there are good opportunities to take on the role of project manager.

Since we often verify our results in realistic environments with field measurements, it is a plus if you appreciate being outside the office and lab environment.

About the Unit

You will be part of the Robust Radio Communication unit, which belongs to the Electronic Warfare department. The unit covers a wide range of technologies, providing great opportunities for varied tasks. The military requirements, such as resilience, uninterrupted service, and detection probability, combined with high mobility, distinguish our operations from those typically conducted by other actors such as academia and companies. We work with radio communication for military users on frequencies from 10 kHz to 100 GHz in close collaboration with clients from all parts of the military defense to ensure high connectivity in peace, crisis, and war.

Do you have the skill profile we need?

Requirements

We are looking for someone who has:

• A Master's degree in engineering in technical physics, electrical engineering, computer engineering, IT, or another equivalent education
• Knowledge of mobile networks (4G and/or 5G), you have likely worked on developing the network side of modern mobile telephony systems (4G/5G)
• Good ability to express yourself verbally and in writing in both Swedish and English

We want you to be an initiative-taking, self-driven, and structured person with strong problem-solving and analytical skills. We solve our tasks together and individually, which means you need to combine independent work with frequent social interaction with colleagues.

We place great importance on your personal qualities.

Meritorious

We often work with broad questions, so it is meritorious, but not necessary, if you have knowledge in any of the following areas:

• Knowledge of civilian wireless communication systems (e.g., Tetra/RAKEL, 6G, satcom, Wi-Fi)
• Knowledge of radio technology or communication systems
• Signal processing for wireless communication
• Experience with Matlab, Python, or C++
• Experience working with test environments and laboratory equipment
• Doctoral education in a relevant field for the position
• Experience in the defense domain, e.g., through previous employment, military service, military volunteer organizations, or companies supplying to defense authorities

We want to utilize all your skills and interests, so feel free to describe any other competencies you wish to continue developing with us.

What do we offer you?

The Total Defence Research Institute (FOI) is a government agency conducting world-leading research in defense and security to support Sweden's military and civil defense. We offer a unique workplace where you can work on what is important for total defense and society as a whole. The research is applied both within defense authorities and with civilian actors and plays a crucial role in building a relevant and effective defense capability.

We consciously work for a good work environment with a good balance between work and private life. In addition, we offer a range of benefits. Read more about what it is like to work with us: https://www.foi.se/jobba-hos-oss.html (https://www.foi.se/jobba-hos-oss.html)

The position is a permanent employment that may start with a six-month probationary period.

Do you want to help find the answers for a safer world?

Welcome with your application in the form of a CV and cover letter via the application button no later than February 28, 2026!

For more information about the position, please contact unit manager Johan Falk. Union representatives are Ulf Sterner (Saco-S) and Pernilla Bergfeldt (OFR/S – ST) All can be reached at 08-555 030 00.

As the position is classified, Swedish citizenship is required. Security screening with background checks will be conducted prior to employment according to the Security Protection Act (2018:585). For the security screening, certified copies of relevant education and service certificates will be requested.

FOI is an authority, and submitted application documents become public records that can be disclosed to third parties upon request according to the Public Access to Information and Secrecy Act.

Offers from recruitment companies are not welcome.