Senior Embedded Systems Engineer JobotSenior Embedded Systems EngineerTorrance, CA$60–$74 / hourInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Teams work closely across engineering, manufacturing, and customers, giving individuals real ownership, visibility, and influence over outcomes.
BAS/HVAC Systems Software Engineer II JobotBAS/HVAC Systems Software Engineer IICovina, CA$90,000–$135,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We offer comprehensive, integrated solutions, including engineering applications, automated control systems, design assistance, sustainable maintenance, and retro-commissioning services.
NewVice President Systems Engineering Marvin Test Solutions, Inc.Vice President Systems EngineeringIrvine, CA$225,000–$270,000 / yearFull timeWe deal with some of the biggest names in commercial and military electronic systems and sub-systems, and we’re looking for an experienced VP to manage our Testing and System Engineering Department. We’re dedicated to advancing our customers' success by designing and delivering innovative test solutions that combine quality, performance, and ease of use.
Project Executive - Mechanical Systems JobotProject Executive - Mechanical SystemsGardena, CA$175,000–$200,000 / yearWe believe great outcomes come from empowering experienced leaders, aligning incentives with performance, and fostering a culture where accountability, collaboration, and long‑term relationships matter. This position serves as the senior project leader for large‑scale mechanical scopes at Los Angeles World Airports among other projects, overseeing execution from preconstruction through closeout.
NewSystems Safety Engineer MANTECHSystems Safety EngineerEl Segundo, CAp/>The Senior System Safety Engineer will help protect our national security while supporting the USSF Space Systems Command (SSC) Space Access Directorate at Los Angeles Air Force Base. Assisting the Debris Characterization (DC) project manager with the coordination of airborne assets to collect data for root cause determination in the event of a catastrophic mishap.
NewSpecialist, Systems Engineering L3Harris TechnologiesSpecialist, Systems EngineeringCanoga Park, CA$92,000–$171,000 / yearPlease click here for the E-Verify Poster in English or Spanish. Requirement Development (60%): Develops systems, subsystem, and component requirements for rocket propulsion systems’ product development.
NewLead Power System Electrical Engineer Davron LLCLead Power System Electrical EngineerHawthorne, CAp>LEAD POWER SYSTEM ELECTRICAL ENGINEER | POWER SYSTEMS ENGINEER | SPACECRAFT POWER ENGINEER | ELECTRICAL ENGINEERING DEGREE | ALTIUM DESIGNER | SPICE | PLANETARY ROVERS | SPACECRAFT POWER SYSTEMS | SOLAR ARRAYS | BATTERY MANAGEMENT SYSTEMS | POWER ELECTRONICS | TEAM LEADERSHIP. This is a rare opportunity to lead complex electrical power system development for next-generation mobility platforms while contributing to mission-critical hardware in a hands-on leadership role.
Embedded Design Engineer Marvin Test Solutions, Inc.Embedded Design EngineerIrvine, CA$115,000–$170,000 / yearFull timeThis involves working on field-programmable gate arrays (FPGAs) and firmware for embedded systems based on cutting-edge system-on-chip (SoC) technology. We collaborate with industry giants in commercial and military electronic systems, offering a dynamic and innovative work environment where monotony is unheard of.
Data Center Controls Engineer JobotData Center Controls EngineerAnaheim, CA$110,000–$180,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We develop creative and effective solutions to meet our employee’s and clients’ needs, creating a culture that acknowledges achievements and encourages professional development while providing challenging project work and career Advancement.
Manufacturing Engineer JobotManufacturing EngineerBrea, CA$100,000–$110,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. With advanced capabilities across silicone sealants and insulation components, our client operates from a modern California facility and serves a broad and critical customer base, while fostering innovation, craftsmanship, and continuous growth.
Sr. ATE Development Engineer Marvin Test Solutions, Inc.Sr. ATE Development EngineerIrvine, CA$120,000–$180,000 / yearFull timeWe deal with some of the biggest names in commercial and military electronic systems and sub-systems, and we’re looking for some bright engineers to join our team. We’re dedicated to advancing our customers' success by designing and delivering innovative test solutions that combine quality, performance, and ease of use.
Manufacturing Applications Engineer – Water & Wastewater Industrial Equipment JobotManufacturing Applications Engineer – Water & Wastewater Industrial EquipmentTustin, CA$95,000–$125,000 / year4+ years of experience in application engineering and proposal development for custom industrial water and wastewater treatment systems, including aeration, clarification, disinfection, media and membrane filtration (NF, RO, UF), water softening, ion exchange, and systems for raw water, boiler water, cooling water, oily water, process water, produced water, ultrapure water, and wastewater treatment. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Sr. DevOps Engineer JobotSr. DevOps EngineerSeal Beach, CA$140,000–$155,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The Development Ops Engineer is responsible for bridging the gap between software development and IT operations, focusing on the continuous and automated delivery of high-quality software.
NewEmbedded Software Engineer JobotEmbedded Software EngineerAnaheim, CA$130,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Job Details: We are seeking a highly skilled, experienced, and passionate Embedded Software Engineer to join our dynamic and innovative engineering team.
NewSenior Manufacturing Engineer JobotSenior Manufacturing EngineerIrvine, CA$120,000–$140,000 / yearWhat makes this company truly distinctive is its scope: it operates its own world class research and development division, manufactures proprietary branded product lines, runs a global continuing education platform, and serves tens of thousands of dental practices from a single, highly scaled campus operation. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Quality Engineer JobotQuality EngineerIrvine, CA$90,000–$100,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We are seeking a detail-oriented Quality Engineer with strong experience in electronics manufacturing to support quality systems, product reliability, and continuous improvement initiatives.
NewPCB Manufacturing Engineer JobotPCB Manufacturing EngineerIrvine, CA$90,000–$110,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The successful candidate will be a vital part of our organization, utilizing their expertise in PCBA Development within electronics manufacturing to drive operational efficiency and effectiveness.
Principal Flight Software Engineer JobotPrincipal Flight Software EngineerEl Segundo, CA$175,000–$200,000 / yearYou will play a pivotal role in shaping software strategy across spacecraft platforms including LEO, MEO, GEO, and responsive space architectures, working closely with systems, avionics, GNC, mission operations, and cybersecurity teams. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Mechanical Engineer JobotMechanical EngineerTorrance, CA$135,000–$165,000 / yearThe successful candidate will be responsible for the design, analysis, development, testing, and integration of mechanical systems and components used in advanced aerospace platforms, including aircraft, spacecraft, unmanned systems, propulsion systems, and supporting ground equipment. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Fire Sprinkler Design Engineer JobotFire Sprinkler Design EngineerLos Angeles, CA$80,000–$100,000 / yearThis is an excellent opportunity to use your expertise in NFPA codes, CAD Drafting, Hydraulic Calculations, Seismic Bracing, Fire Pump Layout, Commercial Fire Sprinkler systems, BIM Design, Clash Detection, HydraCAD, AutoSPRINK, and NICET to make a significant impact on our projects and help us maintain our commitment to safety and excellence. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
Wire Engineer JobotWire EngineerArcadia, CA$120,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. If you are a problem solver who enjoys working on complex projects and has a passion for wire and cable design, we would love to hear from you.
Sr Project Engineer (Structural) JobotSr Project Engineer (Structural)Los Angeles, CA$100,000–$130,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Our team is known for delivering thoughtful, efficient design solutions on technically challenging structures, while maintaining a collaborative, people-first culture where engineers are given meaningful responsibility and growth opportunities.
Senior Materials & Process Engineer JobotSenior Materials & Process EngineerSanta Ana, CA$140,000–$190,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Challenging Work: Solve real-world joining problems involving dissimilar metals, ceramics, atmosphere control, and high-reliability manufacturing requirements.
NewProject Engineer JobotProject EngineerBrea, CA$120,000–$140,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Get Hands-On with Tooling & Injection Molding: Define mold tooling requirements, collaborate with toolmakers on design and validation, review mold flow analyses, and support process optimization and production qualification.
Rubber Process Engineer JobotRubber Process EngineerIrwindale, CA$100,000–$160,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This role will focus on optimizing extrusion processes, improving product quality, troubleshooting production issues, and supporting new equipment and material development.
NewURGENT Rust Engineer Opportunity! JobotURGENT Rust Engineer Opportunity!Santa Monica, CA$125,000–$175,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Jobot, and/or its agents and contracted partners.
Senior Electrical Engineer JobotSenior Electrical EngineerLos Angeles, CA$125,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The ideal candidate will have a strong background in PCI, bus architectures, FPGA/CPLD Programmable logic, Xilinx, Altera, Digital Design, mil-spec, space program, debug, analog design, and space.
NewStructural Engineer JobotStructural EngineerLos Angeles, CA$120,000–$145,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The firm provides innovative solutions across diverse markets, supporting technically complex projects that require regulatory rigor, cost control, schedule discipline, and creative structural design.
Engineer- Flex Assemblies JobotEngineer- Flex AssembliesGlendale, CA$130,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Stay abreast of the latest developments in the field of flex assemblies, and leverage this knowledge to drive continuous improvement in our products and processes.
Principal Forensic Structural Engineer JobotPrincipal Forensic Structural EngineerOrange, CA$156,000–$220,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The firm provides innovative solutions across diverse markets, supporting technically complex projects that require regulatory rigor, cost control, schedule discipline, and creative structural design.
Data Engineer III JobotData Engineer IIIIrvine, CA$160,000–$180,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. 5+ years in data engineering, with a proven track record designing, building, and maintaining ELT pipelines and dimensional models in production.
NewSr. AI Software Engineer (C#/.Net, infrastructure & startup exp. req'd) - 100% REMOTE JobotSr. AI Software Engineer (C#/.Net, infrastructure & startup exp. req'd) - 100% REMOTELos Angeles, CARemote$170,000–$270,000 / yearThe ideal candidate will be mid-level backend .Net Software Engineer with recent experience within a small, fast-paced, API-focused AI infrastructure startup company with lean, highly collaborative engineering teams, where they have operated with significant ownership, autonomy, and a strong “go-getter” mentality. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewSecurity Engineer Vaco LLCSecurity EngineerLos Angeles, CA$55–$90p> Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs. Canadian residents may access our policies in English here and in French here.
Project Engineer III Kaygen Inc.Project Engineer IIIMonterey Park,, CA$60–$70 / hourContractorWe specialize in providing high-volume contingent staffing, direct hire staffing and project-based solutions to companies worldwide ranging from startups to Fortune 500 and Managed Service Providers (MSP) across a wide variety of industries. Coordinate with project stakeholders, including project managers, construction managers, contractors, architects, engineers, inspectors, consultants, and facility representatives.
Test Engineer II (Torrance, CA) - 2 positions GCR Professional ServicesTest Engineer II (Torrance, CA) - 2 positionsTorrance, California$36–$46 / hourContractorTest Planning and Strategy: Collaborate with cross-functional teams, including design engineers and project managers, to understand the requirements and specifications of defense and aerospace systems. Test Automation and Continuous Improvement: Identify opportunities for test automation and develop automated test scripts and frameworks to streamline testing processes and increase efficiency.
Electrical Engineer II (Torrance, CA) - HYBRID GCR Professional ServicesElectrical Engineer II (Torrance, CA) - HYBRIDTorrance, CaliforniaContractoru>*System Analysis: Analyze electrical systems and circuits, perform calculations, and use simulation software to evaluate their performance and make necessary improvements. *Collaboration: Collaborate with other engineers, technicians, and professionals to integrate electrical systems into larger projects or products.
NewFull Stack Engineer Vaco LLCFull Stack EngineerLos Angeles, CA$75–$90p> Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to: the individual’s skill sets, experience and training; licensure and certification requirements; office location and other geographic considerations; other business and organizational needs. Canadian residents may access our policies in English here and in French here.
NewLead Project Engineer L3Harris TechnologiesLead Project EngineerCanoga Park, CA$127,500–$236,500 / yearPlease click here for the E-Verify Poster in English or Spanish. Experienced with the design, manufacturing, or testing involved in the production of liquid rocket engine thrusters, valves, pressure regulators, pressure switches, tanks, or transducers is desired.
GNSS Navigation Algorithm Engineer IconmaGNSS Navigation Algorithm EngineerTorrance, CA$82.84–$87.84 / hourResponsibilities:Apply in-depth and broad GNSS navigation algorithms and estimation theory to contribute the research and development of navigation products and solutions. Collaborate and communicate with cross disciplinary team members to quickly and effectively diagnose and solve system defects and deliver features and improvements.
NewMaintenance Engineer - Full Time Disneyland ResortMaintenance Engineer - Full TimeAnaheim, CAKEYWORD: DLR Casting, dlrcasting, Disneyland Resort Casting Hourly Jobs , DLRResortRoles, DLR Resort Roles, Facilities, HeroesWorkHere. To learn more about our benefits visit: https://jobs.disneycareers.com/benefits.
NewPrincipal Ride Development Engineer Walt Disney ImagineeringPrincipal Ride Development EngineerGlendale, CA$139,200–$186,600 / yearWorking across a spectrum of disciplines that range from creative and conceptual to scientific and technical, Imagineers blend an innovative mixture of storytelling, art, science, and technology to create immersive experiences, memorable destinations, and innovative entertainment for families around the globe. Ride Engineers bring optimism and solutions to design challenges that often seem impossible and partner with diverse creative talent to define and build one-of-a-kind experiences that bring fun and joy to millions of people all around the world.
Embedded Electronic Design Engineer - DM15532016 Marvin Test SolutionsEmbedded Electronic Design Engineer - DM15532016Irvine, CARequired Recent Experience / Knowledge: Experience in designing FPGAs, microcontrollers, and military systems. Collaborate with engineering and manufacturing teams to ensure designs meet specifications and are manufacturable.
NewStaff Civil Engineer - Projects Disneyland ResortStaff Civil Engineer - ProjectsAnaheim, CA$126,800–$154,800 / yearCristi%40disney.com%7C0fcfe28faf844355feb508de900a7d74%7C56b731a8a2ac4c32bf6b616810e913c6%7C1%7C0%7C639106571883301370%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=aM9bJk4GZFd2j%2FGEB5zjlHKfNOUCzXfMwWoUBLPNkA0%3D&reserved=0" rel="nofollow noopener noreferrer" target="_blank">https://jobs.disneycareers.com/benefits. 10+ years of experience in civil engineering design, including site layout, grading, drainage, utilities, stormwater management, erosion, and sedimentation control.
NewOperating Engineer - Facilities - Full Time Disneyland ResortOperating Engineer - Facilities - Full TimeAnaheim, CAOperating Engineers perform operational and functional checks of central plants for our facilities and world-famous attractions, providing direct support to Resort-wide hot water, chilled water, and compressed air requirements. KEYWORD: DLR Casting, dlrcasting, Disneyland Resort Casting Hourly Jobs , DLRResortRoles, DLR Resort Roles, Facilities, HeroesWorkHere.
Senior Linux BSP Software Engineer Kforce Inc.Senior Linux BSP Software EngineerTustin, CA$155,000–$200,000Kforce's client, a growing, up and coming engineering technology company located in Tustin, CA, is hiring a Senior Linux BSP Software Engineer to support the design and development of next generation medical devices. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs.
NewCommercial Construction Project Engineer HITT ContractingCommercial Construction Project EngineerLos Angeles, CA$85,000–$90,000 / yeardiv>Master required job-specific and technical skills in order to promote to an assistant superintendent or assistant project manager following the 12-month training program including, but not limited to, the ability to: Set up and maintain jobsite office and all jobsite records, including project directory, construction documents, subcontractor directory, daily reports, submittal logs, RFI logs, subcontractor correspondence, etc. Ability to learn sector- and project-specific software systems, including but not limited to: Microsoft Office 365 (Project, Excel, Word, Outlook, PowerPoint, etc.), ProCore, Adobe Suite, BlueBeam, and JD Edwards software suite .NewBOMA Certified Swing Shift Engineer ABM IndustriesBOMA Certified Swing Shift EngineerLos Angeles, CA$54.76–$54.76div>This role is instrumental in fostering a culture of safety and reliability, building and leading a team of Critical Facility Technicians, Assistant Chief Engineers, and external contractors to achieve 100% operational availability. Essential Duties & Responsibilities .12345678910Similar Job SearchesBuilding Engineer JobsApplication Engineer JobsDesign Engineer JobsApplications Engineer JobsProduct Engineer JobsPlanning Engineer JobsSystems Engineer JobsSystems Engineer JobsSystems Engineer JobsSystems Engineer Jobs
NewBOMA Certified Swing Shift Engineer ABM IndustriesBOMA Certified Swing Shift EngineerLos Angeles, CA$54.76–$54.76div>This role is instrumental in fostering a culture of safety and reliability, building and leading a team of Critical Facility Technicians, Assistant Chief Engineers, and external contractors to achieve 100% operational availability. Essential Duties & Responsibilities .12345678910Similar Job SearchesBuilding Engineer JobsApplication Engineer JobsDesign Engineer JobsApplications Engineer JobsProduct Engineer JobsPlanning Engineer JobsSystems Engineer JobsSystems Engineer JobsSystems Engineer JobsSystems Engineer Jobs