Job Description

With more than $1B in revenue, Tennant Company is a globally recognized leader in the cleaning equipment industry. For the past 150 years, we have been passionate about developing and manufacturing innovative and sustainable solutions for our customers. At Tennant Company, we are committed to stewardship and creating a cleaner, safer and healthier world. With manufacturing, operations and sales, service, and support functions across the globe, your journey at Tennant can take you places you never expected.

We’re building the next generation of industrial and commercial mobile cleaning robots, and we’re looking for a Senior Mechanical Engineer who wants to own meaningful subsystems—not just tasks. This is a hands-on, execution-driven role where your designs go from concept to production and into the field.

If you thrive on solving complex, ambiguous problems, collaborating across disciplines, and seeing your engineering decisions directly shape a physical product, you’ll feel right at home here.

What You’ll Do

As a Senior Mechanical Engineer, you’ll lead the design and development of mechanical and electro‑mechanical subsystems that are central to our robot platforms’ performance, cost, and reliability.

You will:

• Design and develop innovative mechanical and electro-mechanical subsystems that deliver durable competitive advantage
• Generate new concepts and architectures to meet functional and performance requirements
• Define subsystem performance specifications and evolve them over time
• Create layouts, 3D models, sketches, and schematics to solve complex engineering problems
• Determine required analyses, models, and drawings—and drive them through release
• Lead subsystem development from concept → prototype → validation → production
• Leverage lab and field test data to make informed design tradeoffs
• Perform root-cause analysis when designs don’t meet requirements
• Collaborate closely with electrical, software, manufacturing, and system teams
• Lead and participate in design reviews (formal and informal)
• Plan and execute subsystem prototype builds and support full machine builds
• Own verification and validation testing at the subsystem level
• Partner with suppliers to achieve performance and cost targets
• Mentor junior engineers and designers throughout the development lifecycle
• Create and maintain engineering standards and design documentation that scale

What Makes This Role Exciting

• Real hardware: You’ll design machines that leave the lab and operate in real environments
• End-to-end ownership: See your work through from early concept to production launch
• Cross-functional impact: Tight collaboration with systems, electrical, software, and manufacturing engineering
• Technical depth: Complex electro-mechanical systems with meaningful design tradeoffs
• Leadership without bureaucracy: Lead technically, mentor others, and influence direction

What We’re Looking For

Required Qualifications

• BS in Engineering (Mechanical or related) from an ABET-accredited university
• 3 years of mechanical design engineering experience
• Strong experience in new product development
• Proficiency with CAD (SolidWorks strongly preferred)
• Solid understanding of mechanical and computer-controlled electro-mechanical systems
• Expertise in:
• GD&T, tolerance stack-ups, and tolerance analysis
• FMEA and risk-based design
• Data-driven decision making and statistical analysis
• Ability to model and predict system performance using engineering fundamentals
• Strong written and verbal communication skills
• Self-starter who can manage ambiguity and drive solutions independently

Preferred Qualifications

• MS in Engineering
• Project or technical leadership experience
• Six Sigma experience
• Experience creating engineering standards and best practices

Who You Are

• A creative problem solver who enjoys tackling hard, open-ended engineering challenges
• Comfortable balancing performance, cost, reliability, and schedule
• Passionate about building robust products—not just elegant designs
• Motivated by impact, ownership, and continuous technical growth

Why Join Us?

You’ll work with a highly skilled team building autonomous machines that solve real customer problems , with the opportunity to influence designs that scale across product platforms. We value engineering rigor, practical innovation, and people who want to leave things better than they found them.

Competitive base salary commensurate with experience: $78,700 - 118,100.

Posted salary ranges are made in good faith. Tennant Co. reserves the right to adjust ranges depending on the experience/qualifications of the selected candidate as well as internal and external equity. Total Compensation = Base Salary + Benefits

Benefits = A comprehensive benefits package including health insurance, 401(k), disability, life insurance, paid time off, and voluntary benefits!

Begin your journey with us. Let's reinvent how the world cleans. 

Equal Opportunity Employer

Tennant Company is an equal opportunity employer. Employment decisions are made on the basis of individual skill, ability, reliability, productivity, and other factors important to performance. We do not discriminate on the basis of race, color, creed, religion, sex, national origin, physical or mental disability, age, veteran status, pregnancy, sexual orientation, genetic information, gender identity, or any other basis protected by state or federal law or local ordinance.

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