> Markdown version of [/jobs/ext/3894853-design-engineer-iii](https://www.wearedevelopers.com/jobs/ext/3894853-design-engineer-iii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Design Engineer III - **Company:** Southland Industries - **Location:** Redmond, OR, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Microsoft Excel, Computer-Aided Design, Microsoft Office - **Published:** October 23, 2026 - **Apply:** https://www.techcareers.com/job.asp?id=3466635090&tx=CT2927TTZ&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role * Bachelor's degree in Engineering or related field * PE License required * Minimum 5 years of experience * Strong knowledge of applicable systems design, such as fire suppression, HVAC, plumbing, etc., as well as general understanding of system operations. * Ability to read mechanical and plumbing plans. * Strong verbal and written communication skills * Strong computer skills, including CADD and Microsoft Office Products, including Excel ## Description Lead, evaluate, design, and engineer projects and systems to specification on projects ranging from new design/build to rehabilitation of existing facilities and systems. Provide ongoing technical guidance and engineering issue resolution as needed., * Performs complex calculations, drawings and specifications related to HVAC, plumbing, fire protection or other systems. * Performs complex calculations for a project, such as heating/cooling loads, equipment selection and sizing, friction loss calculations, hydraulic calculations, etc. * Develops standards, methods, processes and procedures for reviewing, evaluating and inspecting designs. * Determines methods and solutions for complex engineering problems and identify the most efficient and acceptable solution. * Directs the workflow of less-experienced engineers on assigned projects. Mentors and provides guidance on designs and technical issues. * Writes technical narratives in response to RFIs.