Principal Optics Engineer Thales Defense & Security IncPrincipal Optics EngineerBillerica, MA$146,151–$186,748 / yearWith over 1,000 employees, TDSI and its four subsidiaries (Advanced Acoustic Concepts, Digital Receiver Technology, Tampa Microwave, and Trusted Cyber Technologies), supports U.S. Joint Services, special operations forces and multi-national partners with a variety of communication, visualization, signal intelligence/electronic warfare, and sensor/sonar capabilities. Analyze performance of optical components: provide and defend first order (oversimplified) calculations with stated assumptions to recommend whether a technical approach is worth further investigation (for instance in the lab).
Principal Electrical Engineer Thales Defense & Security IncPrincipal Electrical EngineerBillerica, MA$149,988–$191,652 / yearLead small digital engineering teams and/or work independently to define requirements, conceive, document (create schematics, interface control documents, hardware design documents, test plans/reports, etc.), analyze/simulate, build prototypes, oversee PCB layouts, perform verification testing, debug, and optimize digital circuit designs to meet requirements at the circuit, card, and product levels. With over 1,000 employees, TDSI and its four subsidiaries (Advanced Acoustic Concepts, Digital Receiver Technology, Tampa Microwave, and Trusted Cyber Technologies), supports U.S. Joint Services, special operations forces and multi-national partners with a variety of communication, visualization, signal intelligence/electronic warfare, and sensor/sonar capabilities.
Principal Forward Deployed Engineer - QuantumBlack, AI by McKinsey McKinsey & Co IncPrincipal Forward Deployed Engineer - QuantumBlack, AI by McKinseyBoston, MAExperience designing, deploying, and managing cloud-based systems (AWS, Azure, or GCP), including containerization (Docker) and orchestration frameworks, with hands-on experience operating and troubleshooting production systems; deep expertise in Kubernetes cluster architecture, installation, configuration, and lifecycle management at production scale. Experience with AI-native platform concepts, including model integration patterns, agentic architectures (tool calling, prompt orchestration, multi-agent workflows), and data pipelines that support AI-driven applications is a plus.
Principal Mechanical Engineer Thales Defense & Security IncPrincipal Mechanical EngineerBillerica, MA$134,621–$172,105 / yearThe senior engineer will work as a member of a design team by providing quality CAD design using advanced principles of mechanical engineering, produce detailed part and assembly drawings using SolidWorks, support prototype builds and verification testing, create and maintain bills of material, and provide supplier support during the procurement of materials. With over 1,000 employees, TDSI and its four subsidiaries (Advanced Acoustic Concepts, Digital Receiver Technology, Tampa Microwave, and Trusted Cyber Technologies), supports U.S. Joint Services, special operations forces and multi-national partners with a variety of communication, visualization, signal intelligence/electronic warfare, and sensor/sonar capabilities.
Principal Fire Protection Engineer SOLV Energy LLCPrincipal Fire Protection EngineerMARemote$144,963–$173,956 / yearIn addition, candidate introductions or resumes can only be submitted to our internal talent acquisition recruiting team if a signed vendor agreement is already on file and the third-party recruiter or agency has received formal instructions from our internal talent acquisition team to submit candidates for a particular job posting. Proven experience working with Authorities Having Jurisdiction (AHJs), including fire marshals and code officials, to secure approvals, ensure regulatory compliance, and successfully navigate permitting, design review, and inspection processes for complex fire protection systems.
Principal Manufacturing Engineer-Npi TransMedics Group, Inc.Principal Manufacturing Engineer-NpiAndover, MA$147,200–$183,600 / yearJob Description: POSITION SUMMARY: The Principal Engineer - NPI Manufacturing serve as the technical project leader for NPI manufacturing activities, driving the development and commercialization of TransMedics perfusion set and OCS products. To accomplish this mission, we partner closely with transplant stakeholders worldwide and help expand their access to healthy donor organs, while delivering the highest quality technology, service, clinical care and outcomes.
Principal Mechanical Engineer, Process Equipment Boston MaterialsPrincipal Mechanical Engineer, Process EquipmentBillerica, MADesign and requisition mechanical machinery and components using CAD (SolidWorks preferred), ensuring design specifications are met, and manage design files, revisions, and workflows within a Product Data Management (PDM) system. 8+ years designing, building, and commissioning custom capital equipment in advanced materials, semiconductor packaging, battery, display, web converting, or other environments where the fidelity of a chemical or materials process must be preserved by the equipment design.
Principal Data Engineer CodaMetrixPrincipal Data EngineerBoston, Massachusetts$175,000–$200,000 / yearThe Data Platform team is responsible for executing the data strategy for the organization, ensuring high-quality external data is ingested into the Lakehouse and realized in powerful insights for internal and external customers, while ensuring ML/AI, BI and customer success teams have the data they need to develop and train their models, build insightful dashboards and design semantic layer. Cross-Functional Enablement & Mentorship - Enable ML, BI, Analytics, DevOps, and customer success and implementation teams with training data pipelines, model-ready datasets, feature store architecture, optimized views, dashboards, Tableau refreshes, infrastructure changes, and tenant onboarding.
Principal Soc Architect - Hardware NvidiaPrincipal Soc Architect - HardwareWestford, MAYou have meaningful industry expertise in SoC architecture definition - Clocks, Resets, Automotive safety, Interconnects, Memory Controller, Boot, Virtualization, Power Management, Security, System Performance, IO technologies, (PCIE, Camera Interfaces, etc), Multimedia accelerator pipelines, CPU/GPU coherency, Platform integration. In this position, you will have the chance to define future aspects of our architectures that bring together NVIDIA GPUs, custom processors and accelerators into a single chip.
Principal Machine Learning Scientist Bayer AGPrincipal Machine Learning ScientistCambridge, MA$123,760–$185,640 / yearThe primary responsibilities of the Principal Machine Learning Scientist are to: Develop, evaluate, and apply machine learning algorithms and workflows for accelerating early-stage drug discovery, including but not limited to (i) de-novo design of biomolecules, (ii) assessment of target druggability across therapeutic modalities (iii) design of drug delivery systems, (iv) identification of novel druggable pockets and epitopes, (vi) characterization of protein-protein and protein-ligand interactions; Contribute to the implementation, validation, and improvement of machine learning tools and software solutions that support drug discovery activities; Identify opportunities for accelerating ongoing drug discovery projects with internal and external AI capabilities; Communicate, educate, and engage with a broad set of stakeholders (chemists, biologists, computational/data scientists, R&D leadership) on the state of technology and the progress of key internal initiatives. D. degree in Computational Chemistry/Biology, Chem/Bioinformatics, Chemical/Biological/Molecular Engineering, or a related field at the intersection of life sciences and computer science; Deep expertise with state-of-the-art machine learning methods for modeling biomolecules, like co-folding and/or generative methods for protein design; Expertise in handling, processing, integrating and analyzing large datasets related to drug development research, including biochemical, biophysical, and structural biology data; Strong programming skills in Python; Demonstrated commitment to scientific rigor, a track record of scientific excellence, strong analytical thinking, and a high degree of self-motivation; Excellent written and verbal communication.
Principal Carelon Research Biostatistician Elevance Health IncPrincipal Carelon Research BiostatisticianNewton, MA$136,000–$234,600 / yearThis researcher partners with investigators, research sponsors, academic institutions, and cross-functional project teams to design studies, develop statistical methodologies, oversee analytical execution, and communicate scientific findings that advance externally funded clinical research programs. Experience designing clinical research studies, developing sample size calculations, statistical analysis plans, outcome measures, and advanced statistical methodologies including survival analysis, causal inference, and experimental design preferred.
Principal Systems Engineer - CLEARANCE REQUIRED BelcanPrincipal Systems Engineer - CLEARANCE REQUIREDTewksbury, MAACTIVE US Secret Clearance REQUIREDDesired Skill Sets:* Experience using test equipment, software installations, and integrating or regression testing systems with certifications in CompTIA Network+ and or CompTIA Security+.* Experience with MATLAB, Linux Operating Systems (Linux Red Hat), Unix, Perl, C/C++, and Shell scripting for performing integration, verification and test analysis, integrating and configuring electronics/network routers, and installing/debugging software.* Experience with agile and DevSecOps processes, implement (or maintain) agile methodologies, participating in daily team standup meetings, sprint reviews, program Increment (PI) Planning meetings, retrospectives, and agile tooling such as JIRA and Confluence, and support execution of the team"s backlog including performance analysis and issue investigation.*
Principal Software Engineer Vets HiredPrincipal Software EngineerBoston, MassachusettsThe ideal candidate brings deep technical expertise, strong leadership, and a hands-on approach to building high-impact systems in a fast-paced, collaborative environment. This role plays a critical part in shaping technology strategy, driving architectural excellence, and mentoring engineering teams to support evolving business platforms.
Principal Systems Engineer – Quantum Computing Systems QuEra ComputingPrincipal Systems Engineer – Quantum Computing SystemsBoston, MassachusettsThe ideal candidate brings extensive experience building complex hardware–software systems (e.g., aerospace, EVs, robotics, advanced instrumentation) and is motivated to apply systems engineering rigor in a learning-driven R&D environment , pairing closely with internal quantum experts. We are seeking a Principal Systems Engineer to play a critical role in aligning engineering execution with scientific and machine-level progress in the development of large-scale quantum computers.
Principal Software Engineer, Berxi Vets HiredPrincipal Software Engineer, BerxiBoston, MassachusettsWe are seeking a highly skilled Principal Software Engineer to lead the design and delivery of scalable, cloud-native digital platform solutions in a direct-to-customer environment. This role plays a key part in shaping technical strategy, mentoring engineering teams, and building secure, high-performance applications that drive business growth.
Principal Performance Test Engineer BlockHiresPrincipal Performance Test EngineerBoston, MassachusettsWe are uniquely positioned at the center of global trading activity, processing over 100 million financial transactions every day, pioneering industry-wide, post-trade solutions and maintaining multiple data and operating centers worldwide. This highly technical position is responsible for the performance engineering of DTCC distributed computing environments and providing analytical stress evaluations of applications/systems and service level compliance using statistical, analytical, and simulation methods.
Principal Cybersecurity Engineer Avenue Technologies CompanyPrincipal Cybersecurity EngineerMarlborough, MassachusettsAvenue Technologies is seeking a Principal Cybersecurity Engineer to support technical, engineering, and program teams in a hands-on environment. Coordinate with engineering and program teams to maintain secure and compliant systems.
Principal Cybersecurity / Threat Hunter Analyst Vets HiredPrincipal Cybersecurity / Threat Hunter AnalystBoston, MassachusettsThis role is ideal for a technical cybersecurity leader passionate about proactively identifying adversaries, strengthening threat detection, and driving rapid, intelligent incident response. The successful candidate will collaborate closely with security engineers and analysts to enhance cyber defense strategies, elevate security maturity, and protect enterprise systems from evolving threats.
Associate Principal Threat Intelligence Analyst Rockstar GamesAssociate Principal Threat Intelligence AnalystAndover, MA$125,000–$150,000 / yearIf hired, employee will be in an "at-will position" and the company reserves the right to modify base salary (as well as any other discretionary payment or compensation or benefit program) at any time, including for reasons related to individual performance, company or individual department/team performance, and market factors. Become part of a team working on some of the most rewarding, large-scale creative projects to be found in any entertainment medium - all within an inclusive, highly-motivated environment where you can learn and collaborate with some of the most talented people in the industry.
Principal Systems Engineer Kforce Inc.Principal Systems EngineerChelmsford, MA$100–$120Kforce has a client in Irvine, CA that is seeking a highly experienced, cross-functional Principal Systems Engineer to drive the system-level architecture, design, and implementation of complex medical devices including defibrillators, patient monitors, and ventilation systems. The ideal candidate brings deep experience with multiprocessor-based medical systems, embedded real-time software, biomedical signal acquisition, power systems, wireless communications, and electronics packaging.