Process Engineer (Chemical)

Execustaff South Africa (Pty) Ltd; Gauteng; On-site; ZAR 600,000 - 840,000; Full time

Job summary

Execustaff South Africa (Pty) Ltd is seeking a chemical/process engineer to lead groundwater treatment design and basic process engineering tasks. You will characterise borehole water sources, size unit operations, and prepare mass/energy balances with equipment specs and operating philosophy.

The role demands water treatment exposure, drafting/modelling skills in AutoCAD/Plant 3D, and familiarity with Aspen Plus; ECSA pathway support is provided. Site work requires a valid licence.

Qualifications

• Engineering degree in chemical engineering or equivalent.
• ECSA candidate engineer pathway with clear progression toward Pr Eng.
• Mass and energy balances, P&IDs, PFDs, equipment sizing, operating philosophy.
• Water treatment exposure through academic or work experience.
• Proficiency with AutoCAD/Plant 3D; Aspen Plus or similar tools.
• Knowledge of HAZOP and process safety considerations.
• Driver's licence and own transport for site work.

Responsibilities

• Groundwater treatment design.
• Characterise raw water sources and define required design scope.
• Select and size unit operations: pretreatment, filtration, disinfection, softening, demineralisation, and advanced oxidation.
• Produce mass and energy balances, hydraulic profiles, equipment specs, and operating philosophy.
• Verify compliance with SANS 241, DWS limits, and client-specific standards.
• Process documentation across all six ECSA stages.
• Safety, compliance, and quality assurance.
• Cross-disciplinary coordination.
• Productisation and methodology development.

Skills

Process design fundamentals

Water treatment exposure

Drafting and modelling

Safety mindset

Driver's licence & transport

Education

Engineering degree (BEng/BSc Chemical Eng or BEng Process Eng)

Tools

AutoCAD

Plant 3D

Aspen Plus

Job description

Must have:

• Engineering qualification. BEng / BSc Chemical Engineering, or BEng Process Engineering, or equivalent. Other engineering disciplines with strong demonstrable process-design depth in water treatment will be considered.
• Professional registration pathway. ECSA Candidate Engineer (registered or pending) at junior level; clear path toward Pr Eng at mid-level; Pr Eng or imminent at mid-senior level.
• Process design fundamentals. Mass and energy balances, P&IDs and PFDs, equipment sizing and specification, control philosophy.
• Water treatment exposure. Demonstrable academic or work exposure to water or wastewater treatment unit operations. Hands-on internship, vacation work, or project experience counts.
• Drafting and modelling. Competence with AutoCAD or Plant 3D; familiarity with Aspen Plus or comparable process simulation tools.
• Safety mindset. Understands HAZOP methodology and the importance of process safety in chemical handling environments.
• Driver's licence and own transport. Site work is part of the role.

Strongly preferred:

• Groundwater treatment depth. Borehole abstraction and raw groundwater treatment design — typically high iron, manganese, hardness, sometimes pathogens, sometimes elevated TDS or nitrates. RO / ion exchange / filtration / disinfection unit operations.
• Regulatory familiarity. SANS 241 (potable water quality), DWS general and special limits, National Water Act Section 21 water use authorisations, fit-for-purpose standards for non-potable reuse.
• Wastewater / package plant exposure. Effluent treatment, package plants, sludge handling, compliance with municipal and DWS effluent standards.
• Data and instrumentation literacy. SCADA, online quality monitoring (turbidity, conductivity, chlorine residual), telemetry, alarm management, performance verification.
• Programming and data tools. Python (Pandas, NumPy, SciPy, etc.) for design calculations, optimisation, or data analysis. Advanced Excel including VBA.
• Lean / continuous improvement. Process optimisation, cost reduction, lifecycle thinking.
• Member of WISA or comparable water sector professional body.

Key responsibilities:

• *Groundwater treatment design
• Characterise raw water from boreholes, surface sources, or blended sources; specify the analytical scope required for design.
• Select and size unit operations: pretreatment (screening, sedimentation, coagulation/flocculation), filtration (multimedia, granular activated carbon, membrane), disinfection (chlorine, UV, ozone), softening, demineralisation (RO, ion exchange), and advanced oxidation as required.
• Produce mass and energy balances, hydraulic profiles, equipment specifications, and operating philosophy for the plant.
• Verify compliance with SANS 241 (potable), DWS general and special limits, and any fit for-purpose standards specific to the client's use case.
• *Process documentation across all six ECSA stages
• *Safety, compliance, and quality
• *Cross-disciplinary coordination
• *Productisation & methodology