Process Engineer - Wastewater Treatment

Johannesburg, South Africa Posted on 18/05/2026

• Salary R CTC (depending on experience)

A leading privately owned engineering company within the water treatment sector is seeking a skilled Process Engineer to join its growing technical team. The business designs and delivers modular water and wastewater treatment plants for clients across healthcare, hospitality, education, manufacturing, commercial, and industrial sectors throughout South Africa and neighbouring African countries.

This role offers the opportunity to take ownership of the full process engineering lifecycle - from process design and hydraulic modelling through to commissioning and performance optimisation. The environment is entrepreneurial, collaborative, and highly dynamic, making it ideal for an engineer who enjoys variety, technical ownership, and continuous growth.

You'll play a critical role in developing fit for purpose treatment solutions that directly impact water quality, sustainability, and operational efficiency for clients across diverse industries.

• Design and optimise water and wastewater treatment processes for modular treatment systems
• Develop process flow diagrams (PFDs), P&IDs, equipment specifications, and control narratives
• Perform hydraulic modelling and process calculationsSelect and specify treatment equipment and process technologies
• Support commissioning activities including FAT/SAT testing, startup, and performance validation
• Troubleshoot process, hydraulic, and operational issues during implementation and operation
• Work closely with mechanical, project, and manufacturing teams to ensure seamless project delivery
• Assist with proposal development, technical submissions, and client solutions
• Monitor plant performance and recommend optimisation improvements
• Support operator training, handover documentation, and long term process performance
• Mentor junior engineers and contribute to technical team development

• Degree in Chemical or Process Engineering
• Minimum 6 years' experience within water or wastewater treatment environments
• Strong understanding of potable water and wastewater treatment processes
• Experience with technologies including UF/NF/RO membranes, filtration, ion exchange, biological treatment, and disinfection systems
• Knowledge of hydraulic modelling and process design software
• Familiarity with SANS 241 and wastewater discharge regulations
• Strong analytical, mathematical, and problem solving capability
• Experience working with PFDs, P&IDs, and commissioning processes
• Ability to work both independently and within cross functional project teams
• Strong communication and stakeholder engagement skills

• Join a growing and highly entrepreneurial engineering business
• Opportunity to work on technically diverse projects across Southern Africa
• Exposure to full project lifecycles from concept through commissioning
• High level of autonomy and technical ownership
• Collaborative team culture with strong opportunity for professional growth
• Work on impactful projects that contribute to sustainable water solutions

• R CTC (Negotiable based on experience)
• Career growth and development opportunities
• Exposure to regional engineering projects
• Dynamic and supportive working environment

If you are passionate about process engineering and want to be part of a company delivering innovative water treatment solutions across Africa, apply directly through SQ1 Recruitment.

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