About Marmon Industrial Water Marmon Industrial Water Limited As a part of the global industrial organization Marmon Holdings—which is backed by Berkshire Hathaway—you’ll be doing things that matter, leading at every level, and winning a better way. We’re committed to making a positive impact on the world, providing you with diverse learning and working opportunities, and fostering a culture where everyone’s empowered to be their best. About Us Marmon Industrial Water designs and manufactures advanced water and wastewater treatment solutions through our trusted brands, Graver Water Systems and Ecodyne. Our technologies serve some of the world’s most demanding industries — petrochemical, chemical, power generation, and heavy industrial plants. From raw water pretreatment and ion exchange to wastewater treatment, cooling, and oil/water separation, our systems play a critical role in keeping essential industries running efficiently and sustainably.
Opportunity We are seeking a Senior Mechanical Designer to play a key role in the design and development of custom water and wastewater treatment equipment. Working closely with Engineers, Project Managers, Procurement, and other stakeholders, you will lead the development of complex 3D models, piping layouts, structural skid designs, and fabrication drawings that support the successful execution of projects from concept through commissioning. As a senior member of the design team, you will provide technical guidance and mentorship to junior and intermediate designers, perform design reviews, and ensure all deliverables meet project requirements, industry codes, client specifications, and company standards. Leveraging your expertise in mechanical design, piping systems, fabrication practices, and industrial equipment layouts, you will identify design risks, drive standardization initiatives, and support continuous improvement efforts. This role requires strong technical judgment, attention to detail, and the ability to translate engineering concepts and P&IDs; into practical, manufacturable designs. You will be instrumental in delivering high‑quality, cost‑effective solutions for customers in the power generation, petrochemical, chemical, mining, and heavy industrial sectors while upholding the highest standards of safety, quality, and engineering excellence.
Responsibilities Lead the development of complex 3D mechanical and piping layouts for skid‑mounted process equipment based on P&IDs;, engineering specifications, applicable codes, and client requirements.
Design and develop detailed fabrication drawings, including pipe spool drawings, general arrangement drawings, and structural skid drawings.
Create, maintain, and review bills of materials (BOMs), material take‑offs, and piping commodity lists for procurement and fabrication.
Utilize SolidWorks and SolidWorks Routing to develop accurate 3D models, assemblies, and fabrication drawings.




Review and interpret engineering documents, specifications, codes, and customer requirements, ensuring all design deliverables meet project objectives.
Perform design reviews, model checks, and drawing audits to ensure quality, consistency, and compliance with company standards.
Provide technical guidance and mentorship to junior and intermediate designers, supporting their development and ensuring design best practices are followed.
Identify design risks, constructability concerns, and opportunities for cost reduction, standardization, and continuous improvement.
Participate in the development and maintenance of design standards, templates, and best practices.
Demonstrate a strong commitment to Quality, Safety, and continuous improvement in all aspects of design.
Qualifications 8-15 years of experience in mechanical design, 3D modeling, and drafting of industrial process equipment and piping systems.
Advanced proficiency with SolidWorks, including large assemblies, weldments, and routing.
Proven experience designing skid‑mounted process equipment, piping systems, and structural support systems.
Ability to interpret and develop designs from P&IDs;, process flow diagrams, engineering specifications, and customer requirements.
Experience reviewing design packages and ensuring compliance with applicable industry standards, project specifications, and company procedures.
Demonstrated experience in coordinating project design activities, mentoring other designers, and providing technical guidance.
Strong problem‑solving, organizational, and analytical skills with exceptional attention to detail.
Excellent verbal and written communication skills, with the ability to effectively collaborate across multidisciplinary teams.
Ability to manage multiple priorities, work independently, and meet project schedules in a quick‑paced environment.
Preferred Experience designing water and wastewater treatment equipment and systems.
Strong working knowledge of ASME B31.3 and/or B31.1 piping codes.
Experience with structural steel design, detailing, and skid frame development.
Advanced SolidWorks Routing experience.
Certified SolidWorks Professional (CSWP) or equivalent industry certification.
Familiarity with pressure vessels, tanks, pumps, heat exchangers, and other process equipment.
Experience supporting fabrication shops and resolving manufacturing‑related design issues.
Additional Information Hybrid Policy in effect – requires 3 days in office per week
This role may require minimal travel (less than 5%)



within North America based on project needs.
Physical demands may vary and could include extended periods of standing and occasional bending or lifting of objects.
What We Offer Employer‑paid group benefits (Life, AD&D;, Health, Dental)
Optional Employee Paid Life and Critical Illness Insurance
Employee Assistance Program
Virtual Health Care
Retirement Plan with Company Match
Learning and Development Opportunities
Tuition Reimbursement Program
Paid Vacation and Personal/sick time
The typical salary range for this position is 90,000 – 105,000 annually. This range reflects the Company’s current expectations for this role based on market data, internal equity, and role responsibilities. Individual offers are determined based on job‑related factors such as skills, experience, and qualifications.
EEO Statement Marmon Industrial Water (MIW) is committed to fostering a culture where everyone feels welcome, valued, and empowered to contribute their unique talents and ideas.
We believe this inclusive and diverse environment is essential for our continued success.
MIW is an equal opportunity employer and is dedicated to building a respectful and inclusive workplace.
All qualified applicants will be considered for employment without regard to any protected class.
Artificial Intelligence (AI) is not used to screen, assess, or select applicants for this position.
In accordance with the Accessibility for Ontarians with Disabilities Act (AODA), we are committed to providing accommodation throughout the recruitment process.
If you require an accommodation, please let us know and we will work with you to meet your needs.
Other Information Learn more about Marmon Industrial Water at www.marmonindustrialwater.com
Company Culture Welcome to the biggest small business you’ll ever find.
Part of Berkshire Hathaway, Marmon is a global industrial organization made of 11 industry groups with 30K employees and $12 billion in annual revenue. As leaders in their respective industries, our 120+ companies thrive on an independent mindset and entrepreneurial spirit. At the same time, they benefit from being part of our industry groups—where they’re able to tap into the expertise and insights of other Marmon companies. While we’re all unique, we all share a common commitment to doing things that matter, leading at every level, and winning a better way.
When you work at Marmon, you’re advancing our everyday world and beyond. Our engineering solutions help millions around the world stay connected, healthy, and safe. Wherever you're at in your career, our people and resources will help you go further. As you grow your skills, you can also move up and around our 120+ companies. Work at a place you can stand behind. We show up to win every day, uphold the highest ethical standards, and always look to put each other in the best position to win.

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📌 Senior Mechanical Designer (Ontario)
🏢 Marmon Industrial Water
📍 Ontario