Comprehensive process safety and management systems consulting - technically rigorous, practically delivered.
We cover the complete process safety lifecycle - from initial hazard identification through to ISO certification, PSM programmes and ongoing compliance.
HAZOP studies, LOPA, SIL/SIS assessments, dust hazard analysis (DHA), machine safety, electrostatic hazard studies, ATEX zoning and consequence modelling.
Design, develop, implement and independently audit comprehensive Process Safety Management programmes aligned to CCPS 20 elements and OSHA 1910.119.
ISO 9001:2015, 45001:2018, 14001:2015, 22000:2018 and 27001:2022 - from gap analysis to certification readiness.
Flash fire, thermal instability, energetic material evaluation, reactive chemical hazards and comprehensive QRA modelling.
SANS 10108 and IEC 60079 zone classification, EI 15 explosive atmosphere study, NCOP 2022 and DSEAR 2002 compliance.
Flammability studies, dangerous goods advisory per ADR/SANS 10228, regulatory classification and turnkey project management.
We bring deep technical expertise to process hazard studies at every stage of the facility lifecycle — from conceptual design safety reviews through to operational HAZOP facilitation and SIL/SIS verification in line with IEC 61511 Ed3.
Explore Service →Robust Process Safety Management is not a document set — it is an operational discipline. We design, implement and audit PSM programmes aligned to the CCPS 20 Elements framework and OSHA 1910.119, building systems that measurably change behaviour.
Explore Service →From single-standard certification to fully integrated management systems covering quality, safety, environment, food safety and information security, we guide organisations through the entire journey with a structured, knowledge-transferring approach.
Explore Service →We provide rigorous, defensible quantitative risk studies — determining whether risks from fire, explosion, toxic release or chemical reactivity are ALARP and supporting land-use planning, insurance and regulatory submissions.
Explore Service →Correct hazardous area classification is the foundation of explosion protection for any facility handling flammable gases, vapours or dusts. We produce compliant, auditable HAC studies with full GA drawing and equipment selection packages.
Explore Service →When you need specialist opinion outside your internal capability, Nexis PS provides targeted technical support — from flammability characterisation and DG compliance through to expert witness testimony and turnkey project management.
Explore Service →Every Nexis PS engagement follows a structured four-stage process designed to deliver thorough, compliant and implementable outcomes.
We begin with a thorough scoping session - understanding your operation, hazards, regulatory obligations and business objectives. We then conduct the relevant assessment: HAZOP, gap analysis, risk assessment or ISO readiness review.
Our specialists design a tailored safety solution - whether a PSM programme framework, ISO management system structure, hazardous area classification study or risk reduction strategy. Solutions are always proportionate and context-specific.
We work alongside your teams to implement - developing documentation, facilitating training, coaching personnel and managing roll-out. We transfer knowledge throughout, not just at handover.
We provide independent auditing, performance monitoring and corrective action planning - benchmarking your performance against international standards and identifying continual improvement opportunities.
Our consultants work across the full spectrum of international process safety and management systems standards.
Common questions about process safety consulting and our services.
A HAZOP (Hazard and Operability Study) is a structured examination of a process or operation to identify hazards, operability problems and causes of incidents. You need a HAZOP when designing a new process, modifying an existing one, prior to major regulatory inspections, or as part of your PSM programme. HAZOP is required under several regulations and is considered industry best practice for high-hazard operations.
HAZOP identifies hazardous scenarios and proposes safeguards. LOPA (Layer of Protection Analysis) quantifies whether the existing safeguards provide adequate risk reduction for identified scenarios. HAZOP is qualitative; LOPA is semi-quantitative. They are typically used in sequence - HAZOP first to identify scenarios, LOPA to assess risk reduction adequacy for higher-consequence scenarios.
For a single facility with supportive management and dedicated resources, ISO 45001:2018 implementation typically takes 9-12 months from gap assessment to certification audit. Multi-site or complex organisations may require 12-18 months. Nexis PS has achieved certification in as little as 10 months by using an intensive, structured implementation approach.
Hazardous area classification (SANS 10108 / IEC 60079-10) is the process of systematically identifying areas where flammable gases, vapours, dusts or fibres may form explosive atmospheres, and classifying them into Zones (Zone 0, 1, 2 for gas; Zone 20, 21, 22 for dust). Classified areas require specially certified electrical and other equipment to be used. Classification is a legal requirement under the OHS Act and relevant regulations.
Absolutely. We regularly assist organisations that have started an ISO implementation but need expert support to close gaps, strengthen documentation or prepare for a certification audit. We begin with a Gap Assessment to establish your current position against the standard requirements then design a targeted implementation plan to reach certification readiness efficiently.
Yes. We believe that sustainable process safety improvement requires knowledge transfer. All our engagements include explanatory sessions for key personnel. We also offer standalone training on HAZOP methodology, ISO management systems, process safety fundamentals and hazardous area classification for in-house SHEQ teams.
Our specialists are ready to help you identify risks, achieve compliance, and protect your people and assets.