Engineering .NET Application Developer

Marmon Holdings•Moscow, TN

12h•Onsite

About The Position

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. Who We Are Coilmaster is a leading manufacturer of heat exchangers and HVAC equipment, serving commercial and industrial markets across the U.S. We are an increasingly software-driven organization, relying on advanced in-house engineering applications to support equipment selection, simulation, and performance modeling across multiple manufacturing sites. As part of the Marmon family of companies, Coilmaster combines deep engineering expertise with scalable technology to deliver reliable, high-quality solutions for our customers. Coilmaster Corporation’s IT team powers core business functions across multiple manufacturing locations. We’re committed to delivering reliable, high-performance software solutions that support both internal operations and customer-facing systems.

Requirements

Bachelor’s degree in Mechanical Engineering, Software Engineering, Computer Engineering, or a related field
7+ years of combined experience delivering production software and engineering applications
Strong proficiency in C# and .NET using Visual Studio
Experience maintaining and modernizing legacy engineering software, including VBA, Visual Basic, or VB.NET
Working knowledge of SQL Server and relational database design
Experience with Windows Forms, web applications, APIs, and data integrations
Familiarity with Agile development practices and CI/CD workflows
Strong debugging skills, root-cause analysis capability, and attention to reliability
Ability to communicate clearly with both technical and non-technical stakeholders
Strong mechanical engineering knowledge related to HVAC and heat exchangers

Nice To Haves

Master’s or PhD preferred

Responsibilities

Serve as a technical lead for Coilmaster’s engineering software platforms used across multiple manufacturing locations
Lead end-to-end development of equipment selection and simulation tools, from feature definition and design through deployment and support
Maintain and modernize legacy VBA and Visual Basic applications through disciplined issue triage, high-quality fixes, and planned enhancements
Lead new development in C# and .NET with a focus on new features, reliability, and long-term maintainability
Develop and support full-stack solutions, including front-end UI/UX, back-end services and APIs, engineering calculation engines, and data integrations
Translate HVAC and thermal engineering models into accurate, testable software that solves real-world customer engineering problems
Apply modern software engineering practices such as Git-based workflows, automated testing, code reviews, and CI/CD
Collaborate with cross-functional teams across three U.S. manufacturing sites and with other developers across Marmon
Document design decisions and architecture while upholding secure coding, version control, and security standards

Benefits

Competitive pay aligned with experience and market benchmarks
Comprehensive benefits including medical, dental, and prescription coverage
401(k) retirement plan with company matching
A highly visible role influencing Coilmaster’s engineering software roadmap
Ownership of mission-critical systems that directly support customers and manufacturing operations
The opportunity to work at the intersection of mechanical engineering and modern software development
Collaboration with experienced engineering, manufacturing, and IT teams across Coilmaster and Marmon
A primarily office-based role with limited travel to three U.S. manufacturing sites

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