Joern Riemer Email & Phone Number

Santa Barbara, CA, US

• Led a team of experts in power electronics and battery technology incubation at Sonos, Inc., focusing on NPI and innovative development processes.
• Developed cost-efficient power electronics solutions without compromising consumer experience, product quality, or safety.
• Established effective standard development processes to accelerate timelines, reduce development costs and optimize cross-functional resources.
• Directing a team of experts in the fields of custom battery pack development, wired and wireless charging, USB and audio amplifiers for portable and wearable consumer electronics

Santa Barbara, CA, US

• Led research and development in battery technology, wired and wireless charging technology, and wireless power transfer technology at Sonos, Inc.
• Directed a team of researchers to multiple patents and patent applications to drive and secure the future of power for Sonos products.
• Collaborated with cross-functional teams to innovate power systems for Sonos products, contributing to the company's success in the industry.

Santa Barbara, CA, US

• Develop Sonos’ technology road map in alignment with Executive Lead Team, program management, sourcing, consumer experience and product HW/SW design teams.
• Build, lead and coach teams of engineers to develop innovative approaches to power storage (batteries, UltraCaps), power transfer/conversion (wireless charging, AC/DC, DC/DC) to deliver on technology road map.
• Establish relationships with technology providers to get exclusive access to technology roadmaps, early samples, and development support for proper evaluation of technologies and to support rapid prototyping for Sonos.
• Identify technology gaps and direct teams in research and development of advanced solutions to drive IP.
• Manage multiple research projects to enable the development of a machine learning driven battery performance models and a seamless integration into existing products (OTA SW updates) and future products (HW/FW/SW).
• Build and execute evaluation plans for power system technologies with the scope of performance, integration complexity, cost, manufacturability, sustainability, and platform dependencies to ensure a robust and smooth.

Santa Barbara, CA, US

• Lead cross functional teams on System Verification activities through entire NPI process
• Develop and execute verification test plans (mainly for Analog and Digital Electronics but also for Mechanics, FW, SW, Acoustics Compliance) and track cross functional progress to ensure mass production readiness
• Effectively communicate System test results & status within multiple product programs and managing risk assessment and mitigation strategies
• Lead innovative test methodology development for new technologies and product features

Brooklyn, New York, US

• Guide COO on EV engineering strategies in preparation of board meetings, vendor negotiations and business planning
• Develop cost effective high power charging station (> 40 kW) concept
• Optimize battery swapping and charging operation, leading to > $3M savings for faster ROI and sustainable scaling of Revel’s business
• Identify optimal charging rate for battery packs that carefully balances battery cycle life performance, maximum available grid power, energy costs and seamless integration into in-field battery swapping schedule
• Develop battery pack design concept for existing mechanical envelope with up to 25% increased energy (riding range), improved safety and long time performance to allow further reduction of operational costs and higher.
• Implement early detection methods of faulty batteries based on existing in-field data

Cupertino, California, US

∙ Managed battery test facility to support qualification of advanced lithium ion battery technology for consumer electronics applications.∙ Oversaw the operation of electrical, FW and mechanical qualification testing.∙ Drove and led innovation development to increase quality and efficiency in Battery and Battery Electronics Qualification Testing.∙ Directed.

Chicago, Illinois, US

• Build, manage and coach team of test engineers to ensure high quality and reliable device characterization to fulfill test requests on time and with excellence.
• Manage development and building of automated test systems
• Improve and expand Device Knowledge Center capabilities to perform efficient device characterizations and substantiate global marketing claims.
• Serve as a resource to the rest of the Duracell organization on device electronic design, reliable testing of electronic devices and test method development
• Drive root cause analysis on battery related issues in OEM devices
• Consult OEM R&D teams in battery optimized device designs to maintain and establish business relationships.

Cincinnati, Ohio, US

• R&D project leader of Duracell's latest innovation, launched in September 2015
• Researched existing PCB/PCBA technologies to implement and adapt into Duracell innovation designs.
• Designed innovative mechanical and electronic PCB layouts to fulfill functional and quality requirements while ensured cost effective assembly.
• Led multi-functional teams of external and internal development partners to drive Duracell's latest innovations.
• Generated and guaranteed efficient project timing and investment plans to obtain senior management agreement.
• Proven track record of complex technical project management and experience with global suppliers and 3rd party test labs.

Cincinnati, Ohio, US

• Developed electronic prototypes and led international software development for advanced Lithium battery technologies.
• Consulted different internal and external development teams in safe, reliable and cost efficient Li-Ion battery management electronic designs.

Cincinnati, Ohio, US

• Managed electronic design projects with internal and external development partners, international suppliers and OEM manufacturers which led to successful product launches.
• PCB layout, circuit design and test methods for DC and AC electronics with high current, high precision on board measurements while ensuring cost efficiency.
• Led and participated in several cost saving initiatives which led to competitive advantage on market.
• Expert for Fault Tree Analysis for all P&G device developments.

Cincinnati, Ohio, US

• Designed and developed innovative electronics for different P&G business units.
• Designed and developed electronic test equipment for performance and quality evaluation.