Perth based1-2 days work from homeStart date: 1st July 2025 (ideally)Reporting to the Engineering Manager, the Senior OT Design Manager - Electrical & Instrumentation plays a critical role in leading the development and delivery of electrical and SCADA systems for water and wastewater infrastructure projects. This role ensures all designs meet relevant standards, industry regulations, and project-specific requirements, while also mentoring junior engineers and collaborating across multidisciplinary teams.Your Benefits• Day rate up to $125/hour• Fortnightly pay via modern online payroll system• 1-2 days work from home• 6-month initial contract (1 July - 31 December 2025)• Dedicated NES Fircroft Consultant and Support Staff available throughout your contract• Invites to NES Fircroft Contractor Events• Potential for contract extension or new opportunities through our extensive client networkKey Responsibilities• Develop electrical and SCADA concept, engineering, and detailed designs for water and wastewater applications, including switchboard design and modifications.• Lead PLC code and SCADA development from user requirements through to commissioning and client acceptance.• Ensure all project deliverables comply with design specifications, applicable standards, and regulatory requirements.• Prepare technical specifications and tender documentation; conduct bid evaluations.• Provide expert technical advice across multidisciplinary project teams.• Manage the design process for large-scale SCADA and control projects.• Collaborate with project managers, construction teams, subcontractors, and vendors.• Mentor and support graduate and early-career engineers.Qualifications & Experience• Degree qualified in Electrical Engineering.• Extensive experience in the water and wastewater industry.• Strong knowledge of relevant design standards and Australian electrical/SCADA standards.• Proven ability to manage complex design projects and coordinate with multiple stakeholders.• Proficiency in Microsoft Office applications.Sound like you? Click the APPLY NOW button or reach out to Emma Shaw for more information at .With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining andManufacturingsectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.