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Senior Scientist


Shoreview, MN, US, 55126

TSI provides trusted measurement, application guidance, and data analytics solutions that enable our customers to make informed decisions. For over 50 years our customers have relied on our products for a variety of critical applications, from environmental monitoring to occupational safety. Headquartered in the Twin Cities, we have sales offices throughout the world. We work closely with leading academic institutions and government agencies to insure the safety of people, the quality of manufactured goods, and the health of the environment.




This person will play a development role in the evaluation and the commercialization of technology across TSI’s portfolio of existing and emerging product spaces, and will serve as a resource for engineers and technical staff. 


Among other skills, this person will need to acquire a strong working knowledge of gas speciation techniques – especially related to electrochemical sensors, mathematical modeling tools, electronics, electro-optics, laser physics, light scattering theory, sensor technology and metrology.  Among other tasks, the applied physicist will work with multi-disciplinary design teams to define technical requirements, determine feasibility, and execute test plans. 



  • Support existing projects and contribute ideas to improve the company’s core competency in the areas of chemical and gas sensors, electronic sensors, instrumentation design, optical sensors, lasers, spectrometers, fluid measurements, particle counting and sizing.
  • Evaluate existing methods and develop improved methods for sensors, measurements and instrumentation especially related to “Internet of Things (IoT)” sensor to cloud support.
  • Contribute to project teams and attend technical reviews offering insights on detection possibilities.
  • Generate theoretical models to simulate instrument performance and guide system design choices.
  • Develop and execute feasibility, verification, and validation subsystem and system level test plans.
  • Perform hands-on lab work and mentor technicians on performing tests, documenting test results, and providing a physics-based explanation of what is being tested.
  • Keep active in the fields of interest by reviewing literature, interacting with existing and potential collaborators, and networking with industrial and academic colleagues.
  • Periodically publish papers and generate patent applications relating to the company’s measurement needs.
  • Complete other assignments and special projects as requested.




    • Masters or PhD in applied physics from an established research institution, or
    • Masters or PhD in electrical engineering or similar field from an established research institution with an undergraduate degree in physics.
    • Instrumentation design, electronic sensors, chemical and gas sensors, optical sensors.



  • 2+ years of industry experience
  • Experience with gas measurement techniques and application (i.e. NDIR, electro-chemical, PID, GC, and FTIR).
  • Electro-optics and laser physics as applied to instrumentation. Software coding experience in C, C++, C# or similar language.
  • Experience using tools such as MATLAB, Python, R, or similar to generate multidimensional models and perform data analysis and visualization.
  • Understand problems and known solutions in detecting, sizing and counting aerosol particles.
  • Familiarity with standard laboratory safety practices.
  • Demonstrated capability to inform and influence technical teams and individuals in addition to senior level management on technical direction



All offers of employment in the U.S., where legally permitted, are contingent on the candidate showing proof of being fully vaccinated against COVID-19 19 (currently one dose of the Johnson & Johnson vaccine or two doses of the Pfizer or Moderna vaccine + 14 days) to pass the pre-employment requirements. Individuals with medical issues or sincerely held religious beliefs or practices that prevent them from getting the vaccine may request an exemption / reasonable accommodation from the vaccine requirement.


Legal authorization to work in the United States without the need for sponsorship.  We require proof of eligibility to work in the United States.



TSI provides trusted measurement, application guidance, and data analytics solutions that enable our global customers to make informed decisions.  We are creating a better world by helping protect people, products and the environment, as well as by optimizing research and industrial processes.

Nearest Major Market: Minneapolis

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