Flex

Presales Engineer - Liquid Cooling

Flex$110K — $151K *
Technical Services
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • B.S. in Mechanical Engineering required
  • Foundation in fluid mechanics or heat transfer
  • 3+ years of experience in pre-sales or technical roles
  • Experience with fluid-based mechanical designs
  • Strong communication and presentation skills

Responsibilities

  • Lead technical discovery conversations to identify customer thermal requirements
  • Act as the primary technical interface during customer engagements
  • Support sales efforts with RFP/RFQ responses and technical content creation
  • Gather customer requirements for engineering liquid cooling solutions
  • Collaborate with engineering to understand and communicate solutions
  • Evaluate AI system-level integration with cooling technologies
  • Develop and deliver compelling technical presentations on JetCool's technologies

Benefits

  • Comprehensive medical, dental, and vision plans
  • Life insurance coverage
  • Short-term and long-term disability insurance
  • Matching contributions to 401(k) plans
  • Vacation and paid sick leave
  • Tuition reimbursement program
Full Job Description
Job Posting Start Date 06-03-2026 Job Posting End Date 08-31-2026

Job Summary

JetCool, a Flex Company, delivers patented direct-to-chip liquid cooling solutions purpose-built for AI and high-density compute environments. Powered by JetCool's proprietary microconvective cooling technology and full-stack portfolio-from SmartPlates to Coolant Distribution Units (CDUs)-we enable leading processor and system designers to push performance, efficiency, and reliability to new limits.

The Pre-Sales Engineer based in either Littleton, MA, Austin, TX or Milpitas, CA serves as a technical advisor to customers requiring liquid cooled Cold Plates (SmartPlates) and Cooling Distribution Units (CDU), bridging thermal and mechanical engineering depth with clear, confident customer communication. This role owns pre-sales technical engagement ensuring JetCool solutions meet customer thermal performance and AI System and Rack integration needs. Success in this role requires the ability to communicate complex fluid-dynamics and heat-transfer Engineering analysis into concise, customer-ready explanations, while adapting technical depth in real time based on audience and context.

What a Typical Day Looks Like:
  • Lead technical discovery conversations to understand customer thermal requirements for AI Systems
  • Serve as the primary technical interface in customer engagements
  • Support sales engagements including RFP/RFQ responses and drafting content.
  • Gather the customer requirements and technical documents for Engineering to develop the liquid cooling solution
  • Partner with Engineering in understanding and communicating the liquid cooling solution
  • Evaluate AI system-level integration across cold plates, manifolds, CDUs, and rack-level cooling solutions
  • Develop and deliver technical presentations highlighting JetCool's technologies' differentiation
  • Present thermal technical analyses in a clear, customer-consumable format for both engineers and procurement managers
  • "Read the room" and adjust technical depth, pacing, and messaging based on audience feedback


The Experience We're Looking to Add to Our Team:
  • B.S. Mechanical Engineering
  • Foundation in fluid mechanics or heat transfer (experience with both preferred)
  • 3+ years of industry experience, including pre-sales, engineering, or customer facing technical roles
  • Experience working with fluid based mechanical designs
  • Strong communication and presentation skills
  • Exposure to CFD analysis tools (e.g., ANSYS, Icepak, FloTHERM) is preferred but not required
  • Apply fundamentals of fluid mechanics and heat transfer to help JetCool Engineering develop liquid cooling solutions to meet customer requirements is preferred


What you'll receive for the great work you provide:
  • Full range of medical, dental, and vision plans
  • Life Insurance
  • Short-term and Long-term Disability
  • Matching 401(k) Contributions
  • Vacation and Paid Sick Time
  • Tuition Reimbursement


Pay Range (Applicable to Massachusetts)

$110,100.00 USD - $151,400.00 USD Annual

Job Category
Design, Process & Technology Engineering

Relocation: Eligible for domestic relocation only

Is Sponsorship Available?
Yes

About Flex

Flex Ltd. is an American Singaporean-domiciled multinational electronics contract manufacturer. It is the third largest global electronics manufacturing services (EMS), original design manufacturer (ODM) company by revenue, behind only Pegatron for what concerns original equipment manufacturers. Flex has manufacturing operations in over 30 countries, totaling approximately 200,000 employees.
Learn more about Flex
Size
172,648 employees
Market Cap
$9.7 billion
Industry
Net Income
$421 million
Founded
2016
5 Year Trend
+1.8%
Revenue
$23.3 billion
NASDAQ

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