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 products.• 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 integration into product design and to deliver a long-term competitive advantage.

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 ROI• 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 development of new testing methodologies, SOPs and contributed to the development of testing equipment for reliable and repeatable verification of product specifications.∙ Ensured proper level of staffing, training and resource coordination to effectively address required activities.∙ Led internal resources and external suppliers to maintain and optimize test equipment, operating software, data processing, data traceability and lab facility infrastructure.∙ Led cross-functional teams to qualify new battery technology, design and battery electronics.∙ Audited suppliers to ensure common testing standards at vendor and compare with in-house qualification results.∙ Ensured highest possible data integrity.

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.• Detect global device and technology trends to foresee future consumer and OEM needs.• Investigate technology and electronic component trends to guide and recommend future battery development programs.

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.• Selected best valued supplier, negotiated pricing and delivery terms within adherence to investment plan.

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.