Thermal Engineer

The application window is expected to close on: 08/31/2026 Job posting may be removed earlier if the position is filled or if a sufficient number of applications are received . This role requires being onsite in San Jose, CA at least 4 days/week. Meet the Team The Common Hardware Group (CHG) creates innovative hardware platforms central to the AI era, powering Cisco's core Switching, Routing, and Wireless products for organizations globally. Our innovations in silicon, optics, and hardware platforms-like Silicon One-are shaping the technology industry. We're a global team of creative experts, bringing our unique backgrounds and bold ideas to push boundaries and help each other grow. Because full product development-from design to qualification to production-is within our team, we're able to think differently, experiment more, and work quickly. Join us to power the future of the digital world. Your Impact Design and develop thermal solutions (air cooled or liquid cooled) for systems with high-power ASICs and high-density optical transceivers. Develop detailed package, board, and system level simulations using Computational Fluid Dynamic tools such as Flotherm or Icepak to simulate and analyze thermal solutions. Collaborate with Distinguished Engineers and Hardware leads on system architectures and cooling. Perform thermal testing (including airflow, acoustic, thermocouple testing, modules, and/or platform level validations) to validate simulation models. Lead and mentor other thermal engineers in the group. Collaborate with mechanical engineers and other cross-functional teams to identify risks, derive tradeoffs and deliver objective, data-driven solutions. Develop test plans and test reports and present simulations reports to project team and management. Minimum Qualifications: Bachelors in Mechanical or Thermal Engineering + 12 years of related experience, or Masters in Mechanical or Thermal Engineering + 8 years of related experience, or PhD in Mechanical or Thermal Engineering + 5 years of related experience. 5+ years of experience in design, simulation, and testing of thermal solutions for electronic devices and systems. Preferred Qualifications: 3+ years of relevant experience in the thermal design of telecom, compute, or networking equipment. Experience in use of Computational Fluid Dynamic analysis tools such as Flotherm or Icepak. Knowledge and experience with advanced air-cooling technologies (vapor chamber and remote heat sinks, thermal interface materials, fans/fan trays). Experience with designing liquid cooling and/or immersion cooling systems. Experience with performing other analysis such as Finite Element Analysis (FEA) and Data Center cooling simulations. Experience with 3D MCAD modeling tools such as PTC's Creo or NX. Why Cisco? At Cisco, we're revolutionizing how data and infrastructure connect and protect organizations in the AI era - and beyond. We've been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint. Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you'll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere. We are Cisco, and our power starts with you. Message to applicants applying to work in the U.S. and/or Canada: The starting salary range posted for this position is $191,400.00 to $281,400.00 and reflects the projected salary range for new hires in this position in U.S. and/or Canada locations, not including incentive compensation*, equity, or benefits. Individual pay is determined by the candidate's hiring location, market conditions, job-related skillset, experience, qualifications, education, certifications, and/or training. The full salary range for certain locations is listed below. For locations not listed below, the recruiter can share more details about compensation for the role in your location during the hiring process. U.S. employees are offered benefits, subject to Cisco's plan eligibility rules, which include medical, dental and vision insurance, a 401(k) plan with a Cisco matching contribution, paid parental leave, short and long-term disability coverage, and basic life insurance. Please see the Cisco careers site to discover more benefits and perks. Employees may be eligible to receive grants of Cisco restricted stock units, which vest following continued employment with Cisco for defined periods of time. U.S. employees are eligible for paid time away as described below, subject to Cisco's policies: 10 paid holidays per full calendar year, plus 1 floating holiday for non-exempt employees 1 paid day off for employee's birthday, paid year-end holiday shutdown, and 4 paid days off for personal wellness determined by Cisco Non-exempt employees** receive 16 days of paid vacation time per full calendar year, accrued at rate of 4.92 hours per pay period for full-time employees Exempt employees participate in Cisco's flexible vacation time off program, which has no defined limit on how much vacation time eligible employees may use (subject to availability and some business limitations) 80 hours of sick time off provided on hire date and each January 1st thereafter, and up to 80 hours ofunused sick timecarried forwardfrom one calendar yearto the next Additional paid time away may be requested to deal with critical or emergency issues for family members Optional 10 paid days per full calendar year to volunteer For non-sales roles, employees are also eligible to earn annual bonuses subject to Cisco's policies. Employees on sales plans earn performance-based incentive pay on top of their base salary, which is split between quota and non-quota components, subject to the applicable Cisco plan. For quota-based incentive pay, Cisco typically pays as follows: .75% of incentive target for each 1% of revenue attainment up to 50% of quota; 1.5% of incentive target for each 1% of attainment between 50% and 75%; 1% of incentive target for each 1% of attainment between 75% and 100%; and Once performance exceeds 100% attainment, incentive rates are at or above 1% for each 1% of attainment with no cap on incentive compensation. For non-quota-based sales performance elements such as strategic sales objectives, Cisco may pay 0% up to 125% of target. Cisco sales plans do not have a minimum threshold of performance for sales incentive compensation to be paid. The applicable full salary ranges for this position, by specific state, are listed below: New York City Metro Area: $191,400.00 - $323,600.00 Non-Metro New York state & Washington state: $176,100.00 - $287,900.00 * For quota-based sales roles on Cisco's sales plan, the ranges provided in this posting include base pay and sales target incentive compensation combined. ** Employees in Illinois, whether exempt or non-exempt, will participate in a unique time off program to meet local requirements.