Independent engineering review & consulting · Worldwide
Independent engineering judgement, before the decision is irreversible.
ImmersaEngineering is an engineering consultancy firm providing independent review and advisory services across chemical, process, project and technology development engineering. Engagements are short and clearly scoped: an external opinion before capital is committed, before a design is issued, or where a programme warrants a second assessment.
NDA before technical detail · Free initial consultation · Findings ranked by consequence · Confidentiality by default
Background
Grounded in facilities that reached production.
The firm draws on direct experience in the design, construction, commissioning and operation of process facilities in demanding service — petrochemical and refining, hydrocarbon storage and distribution, water treatment, specialty and hazardous gas systems, advanced materials, and high-purity process systems.
That experience spans the full project lifecycle: concept and feasibility, basic and detailed design, procurement and construction support, commissioning and start-up, and the operational troubleshooting that follows handover. It extends to research and development carried from first principles through pilot scale to commercial production.
ImmersaEngineering applies that background as an independent reviewer and adviser rather than as a design contractor. The value lies in senior judgement applied early and sparingly, to decisions that are expensive to reverse.
Specialist domains
Representative codes, frameworks and guidance, used where applicable
Grouped by what each one is. The adopted edition and clause are stated in the deliverable, not here.
South African statutory
Pressure equipment & piping
Overpressure protection
Functional safety
Explosive atmospheres
Leak testing
Specialty gases & technology readiness
See what that covers →Safety
Hazard studies on operating facilities. Chairing and participating in HAZOP and safety studies on live installations, and carrying the resulting actions through to close-out.
Commissioning
Commissioning under live conditions. Cold and hot commissioning of facilities in pyrophoric, cryogenic and high-vacuum service, including management of the emergency scenarios that arise.
Standards
Engineering standards written, not only applied. Authoring the in-house vacuum and leak-tightness standards a facility is built and verified against, and advising on the implementation of the published pressure-equipment codes that govern it.
Technology
Novel technology to production. Advancing novel process technology from first-principles modelling through prototype and pilot to commercial-scale operation.
Capital
Capital programmes delivered. Directing multi-discipline engineering across concurrent projects, from estimate and gate approval through construction to handover.
Analytical
Analytical capability built. Establishing laboratory, measurement and method capability to the standard required to support commercial product release.
Services
Four disciplines. One consistent role: independent review.
Each engagement is scoped around a specific question or document set — a single calculation, a full design package, a project plan or a technology programme. In every case the deliverable is a written, revision-controlled document rather than verbal advice alone.
Calculations & documents
Chemical engineering
Review and consulting on the calculations a facility is built on: whether the sizing holds, whether the balance closes, and whether the design basis is defensible.
Calculations · Datasheets
Flowsheets · Reports
17 review areas
- Process sizing and rating calculations, independently checked — process duty, not mechanical or code design
- Mass and energy balances
- Hydraulic calculations: single-phase, two-phase, compressible and gravity flow
- Heat transfer and exchanger sizing and rating
- Separation and mass-transfer design — distillation, absorption, adsorption and phase-change duties
- Process simulation review and validation, steady-state and dynamic
- Relief scenario identification and screening
- Relief load determination for the governing case
- Relief valve and rupture disc sizing and selection — relief device datasheet review
- Relief inlet, outlet and disposal-system review
- Equipment datasheets and technical specifications
- Flowsheet development and review — BFD, PFD, MFD, UFD
- Process design basis and design philosophy documents
- Utility system design — cooling water, steam, nitrogen, instrument air, vacuum
- Materials selection and process compatibility
- Technical bid evaluation and vendor document review
- Technical reports, calculation notes and engineering studies
Design, control & safety
Process engineering
Review and consulting on how a facility is intended to operate, how it may fail, and whether the design can be constructed, operated and maintained as drawn.
Process design · Control
Safety studies · Readiness
18 review areas
- Safety reviews — HAZOP, HAZID and what-if, chaired independently for a client-constituted multidisciplinary team
- LOPA support — scenario development, independent protection layer credit and assumptions
- SIL target determination, safety requirements specification review and safety instrumented function design review, within the IEC 61511 lifecycle rather than as a one-off calculation
- Overpressure protection philosophy and relief system review
- Hazardous area classification and explosion protection concepts
- P&ID development and review
- Control philosophy and operating philosophy
- Cause-and-effect matrices, interlock and alarm rationalisation
- Line sizing, line lists and valve criticality
- 3D model reviews — 30%, 60%, 90% and pre-construction
- Layout, plot plan, access and maintainability review
- Management of change review and pressure-equipment compliance interface
- Pre-commissioning, commissioning and start-up procedures
- Operating procedures, safe operating limits and operator training material
- Operational readiness review — procedures, operating limits, training material and start-up sequence
- Emergency scenario review and operator response preparedness
- Operational troubleshooting, debottlenecking and performance investigation
- Throughput and bottleneck investigation on operating facilities
Planning, economics & risk
Project engineering
Review and consulting on whether a project is structured to succeed, and whether the economic case for it holds: the plan, the resourcing, the capital and operating estimates, the return, and the risks not yet recorded.
Planning · Gates · Risk
Estimates · Economics
18 review areas
- Independent gate reviews and project health checks
- Project planning and execution strategy
- Roadmaps, milestones and stage-gate definition
- Work breakdown structure and project organisation design
- Resource loading, skill-set mapping and capability gap analysis
- Schedule review — logic integrity, constraints and calendars, status quality, near-critical paths, resource feasibility, baseline and change control, and schedule risk
- Progress measurement and reporting frameworks
- Capital cost (Capex) estimate review — classification framework, scope-definition maturity, basis, allowances and how contingency was derived
- Operating cost (Opex) build-up — utilities, consumables, labour, maintenance and overhead
- Levelised cost of production, and the throughput and availability assumptions it rests on
- Project economics — net present value, internal rate of return, payback and return on investment
- Sensitivity and scenario analysis, kept distinct from probabilistic risk analysis — varying one input at a time is not the same as jointly modelling correlated uncertainties
- Risk analysis, risk registers and mitigation strategies
- Contracting and execution model selection — EPC, EPCM or owner-managed
- Interface management and scope-split definition
- Procurement strategy and long-lead item identification
- Stakeholder identification, mapping and engagement planning
- Close-out, lessons learned and as-built handover review
Readiness & scale-up
Technology development
Review and consulting on advancing a technical concept to operating scale: what to prove next, the cost of establishing it, and which assumptions will not survive scale-up.
R&D planning · Technology readiness (TRL)
IP navigation · Commercialisation
18 review areas
- Technology readiness evaluation against a defined application and relevant environment, with the readiness framework named and adapted where it originates in another sector
- Research and development programme planning and prioritisation
- Experimental programme design and test-rig specification
- Innovation portfolio structure and stage-gate governance
- Scale-up strategy — laboratory to pilot to demonstration to commercial
- Proof-of-concept and pilot data interpretation and validation
- Independent review of technical claims and performance data
- Manufacturing bottleneck, throughput and capacity analysis
- Techno-economic assessment and cost-of-production modelling
- Commercialisation planning and route-to-market assessment
- Technical and technology due diligence for boards, investors and acquirers
- Commercial due diligence — unit economics, cost build-up and the operating model behind the technology
- Build-versus-buy and technology selection assessments
- IP landscape orientation, disclosure strategy and technical issue-spotting to brief a patent attorney — not a freedom-to-operate or patentability opinion, which is legal work
- R&D organisation design, capability building and laboratory set-up
- Analytical method and instrumentation strategy
- Computational capability review — simulation strategy, stochastic methods including Monte Carlo, and whether input distributions, dependence between inputs and model form justify the confidence claimed
- Machine-learning and data-driven models — data provenance, leakage, train and test separation, drift and out-of-distribution behaviour, and the distinction between prediction and causal process understanding
What a review finds
Three examples, invented.
Capability statements are easy to write. These are the shapes a finding actually takes. Each is invented for illustration — no client, no sector and no engagement lies behind any of them.
- A relief case sized against the wrong governing scenario. External fire, not blocked outlet, set the required area — the specified orifice was one size short. Raised at 60% design, ahead of procurement.
- A column specified on a feed assay that excluded trace heavies. At the measured assay the bottoms ran hotter than design, pushing the reboiler past its duty and capping throughput before the unit reached nameplate.
- A vacuum system that met its pump curve and never reached base pressure. The constraint was outgassing from an elastomer seal chosen on cost, not the pump. Two weeks of commissioning lost, avoidable at datasheet stage.
Illustrative and non-attributable. Nothing arising from a real engagement is reused, retold or cited as a credential.
Discuss a requirement →Engagement formats
Engagements scoped to the decision, not to a headcount.
Each format below is structured around a defined question and a defined deliverable. Where a full engineering contractor is the appropriate solution, ImmersaEngineering will say so, and is equally comfortable working alongside one.
Second opinion
A single question answered in writing: a vendor claim, a sizing, a datasheet, a relief case, or a figure that warrants verification.
Design & document review
Calculations, datasheets, flowsheets, P&IDs, specifications and safety cases returned marked up, with the reasoning attached and findings ranked by consequence.
Safety study facilitation
An independent chair for HAZOP, HAZID, node review and overpressure studies. Findings are recorded as found: the chair holds no schedule or commercial interest in the outcome.
Project & gate assurance
Independent assessment of a plan, estimate, schedule or stage gate prior to approval, together with the risks not yet recorded on the register.
Technical & commercial due diligence
Prepared for boards, investors and acquirers: whether the technology is proven, whether claimed performance is achievable, whether the capital and operating estimates are credible, what the unit economics actually are, and what belongs on the risk register.
Troubleshooting support
A system that will not hold vacuum. A unit that will not converge. Product that will not meet specification against a shipment date. Delivered remotely where possible, on site where required.
Operational readiness
An independent assessment ahead of start-up: whether the procedures, operating limits, training material and emergency scenarios match the facility that was actually built rather than the one that was designed.
Manufacturing & throughput
For an operating facility producing less than it should. The binding constraint is identified and quantified — equipment, sequence, staffing or specification — and each option for lifting it is set out with what it would cost.
Technology & scale-up strategy
Laboratory to pilot to production. What to build, what to procure, what to prove next, and which current assumptions will not hold at operating scale.
Advisory retainer
An agreed monthly allocation of senior engineering time, for organisations requiring judgement more frequently than they require a project.
Other requirements
Requirements that do not fit these formats are welcome. Describe the need and ImmersaEngineering will confirm suitability and propose a structure.
The process
From first contact to written position.
01
Enquiry
A short description of the problem, the document set or the decision. No scope document required.
02
Mutual NDA
Executed before any technical detail is exchanged, together with a secure route for transferring documents.
03
Scope and fee agreed
The question, the deliverable and the governing assumptions are written down and priced before work begins.
04
Review
Governing cases are recalculated independently by an appropriate validated method, rather than checked against the original working. The correlations, property data, code basis and assumptions relied on are stated.
05
Written position
Findings ranked by consequence, with evidence, assumptions and residual risk stated, and a session to take them through.
What arrives
Whatever exists. A calculation sheet, a datasheet, a P&ID set, a project plan, a stage-gate pack, a technology dossier — at whatever revision it currently stands. Documents are not required to be complete or consistent; where they are neither, that is usually part of the finding.
Every document is logged against the revision reviewed, so that a finding can be traced to the exact version it was raised against.
What happens to it
Governing cases are recalculated independently by an appropriate validated method, rather than checked line by line against the original working, with the correlations, property data and code basis stated. An independent result that agrees within a stated tolerance raises nothing. A result that does not is traced to its cause before a finding is written, so the finding describes the cause and not the discrepancy.
Documents are then read against one another — datasheet against P&ID, calculation against balance, plan against risk register — because a defensible number inside an inconsistent document set still causes the wrong equipment to be bought.
What comes back
A revision-controlled document. Findings ranked by consequence rather than by the order the documents were read, each with evidence, the assumptions relied on, and what would have to be true for the finding to be wrong.
Items examined and found sound are recorded too, so the boundary of the review is explicit and the same ground is not re-reviewed at the next gate. Residual risk that remains after the recommended actions is stated rather than implied.
Indicative turnaround
| Second opinion, single question | 2–4 working days |
| Design or calculation review | 1–3 weeks, by package size |
| Safety study or gate assurance | 2–4 weeks, including sessions |
| Technical & commercial due diligence | 1–3 weeks |
Confirmed against the actual document set at quotation. Where a date cannot be met, that is stated before the engagement is accepted rather than after.
Revision and close-out
The first issue is Rev 0, for client review. Rev 1 records the client and contractor response against every finding — accepted, rejected with reasons, or superseded by a document revision. Findings are not closed by ImmersaEngineering; they are closed by the client, and the record of that closure stays with the client.
At close-out, documents supplied for review are returned or destroyed, confirmed in writing. Nothing arising from an engagement is reused, referenced or cited as a credential elsewhere.
See a specimen deliverable →Pricing and structuring. Every engagement is quoted against a written scope before work begins, in the client’s currency, so that cost is established prior to commissioning. Fixed-fee, day-rate and retainer structures are available according to the nature of the work. Contact ImmersaEngineering for pricing and structuring options.
How large is an engagement? The smallest is a single written opinion on one defined question. The largest is a full design-package review, or a board-level technical due diligence running to a few weeks. Anything requiring a standing project team belongs with an engineering contractor, and ImmersaEngineering will say so.
Discuss a requirement →Delivery model
Remote by default. On site where the work requires it.
The firm operates on a remote-first basis. Work requiring physical presence — commissioning support, study chairing, leak investigation — is conducted on site, internationally. All other work is delivered effectively through documents and scheduled discussions.
Time-zone coverage
Based at UTC+2. A normal working day overlaps Europe, the United Kingdom, the Middle East, Africa and India in full, Asia-Pacific through the morning, and the Americas from mid-afternoon.
On-site attendance where warranted
Commissioning support, study chairing, model reviews and operational troubleshooting are conducted in person. Travel is quoted separately, and ImmersaEngineering will advise where attendance is not justified.
Confidentiality and privacy
Confidentiality and privacy are core operating values rather than a formality. Nothing arising from an engagement is reused, referenced or cited as a credential elsewhere — no client is named, no problem is retold, and no output is recycled.
Scope agreed before fee
The question, the deliverable and the governing assumptions are recorded before a fee is agreed. Where the question changes, the scope is formally re-agreed rather than expanded by default.
Client material held only for the engagement
Documents supplied for review are held only for the duration of the engagement, and are returned or destroyed at close-out, confirmed in writing.
An answer, in writing
Every engagement concludes in a written document setting out method, findings ranked by consequence, the assumptions relied on, and the residual risk that remains.
Sector focus
Depth is concentrated where the firm has designed, commissioned or operated the process directly. Adjacent sectors are accepted where the underlying unit operations are the same.
Primary
Chemical & petrochemical processing
Oil, gas & fuel storage terminals
Specialty & industrial gases
Adjacent
Advanced materials
Semiconductor & electronic materials
Hydrogen & cryogenic energy
Energy storage & electrochemical systems
Discuss a requirement →
Scope & independence
Work is declined where independence cannot be held.
Conflicts are screened before a quotation is issued — against current and prior engagements, and against any other professional commitment held. Where a conflict exists, or where the appearance of one cannot be managed, the enquiry is declined and the reason is given. Work is taken only in domains ImmersaEngineering has designed, commissioned or operated directly; where a request falls outside them, that is said at the outset rather than discovered later.
That boundary is what makes the advice worth commissioning: a contractor’s design can be reviewed by someone with no interest in that contractor’s next contract. It is set out here rather than buried in a proposal.
Illustrative. Every engagement concludes in a revision-controlled written position, with findings ranked by consequence and residual risk stated.
Read a specimen review reportFully invented. No client material of any kind is reproduced, in this document or anywhere else.
- Review, advisory and study work is undertaken. Bulk EPCM, detailed design production and construction management remain with the client’s engineering contractor.
- The deliverable is engineering judgement and a written position, not volume document production or drafting.
- Engagements are scoped pieces of work rather than secondment, staff augmentation or resourcing.
- Conflicts of interest are screened before quotation — against current and prior engagements, and against any other professional commitments held. Where a conflict exists, or where the appearance of one cannot be managed, the enquiry is declined and the reason stated.
- Work is undertaken only in domains ImmersaEngineering has designed, commissioned or operated directly. Where a request falls outside these, that is stated at the outset.
- Company registration, tax and insurance documentation, standard terms of engagement and any further vendor-onboarding requirements are provided on enquiry.
Basis of advice
A review is prepared for a named client and for the specific purpose recorded in the agreed scope. It is based on the information supplied and on the assumptions set out in the deliverable, both of which are stated explicitly so that a reader can test them.
An independent review does not transfer or discharge the design, construction or statutory responsibilities of the client or of the client’s contractors, and it does not constitute certification, approval or statutory sign-off. Where certification or sign-off is required it is arranged separately, and identified in writing before the work begins.
Full terms, including limits of liability and the period for which findings hold, are issued with every quotation.
Contact
Submit a requirement.
A formal scope document or approved budget is not required to begin. A short description of the problem, the document set or the decision is sufficient for ImmersaEngineering to confirm suitability, propose a structure and provide an indicative cost.
- A mutual non-disclosure agreement is executed before technical detail is exchanged.
- The initial discussion is provided at no cost and is used to scope the requirement.
- Where ImmersaEngineering is not the appropriate provider, that will be stated, together with a referral where one can be offered.
- Company registration, tax and insurance documentation, standard terms of engagement and further vendor-onboarding requirements are provided on enquiry.
- No mailing list and no follow-up sequence. A reply, and nothing else.
ImmersaEngineering is the independent engineering advisory division of Immersa Hub (Pty) Ltd, registration number 2026/463574/07, a company registered in South Africa and situated in Pretoria, Gauteng. Contracting, invoicing and liability sit with that entity. Clients are served worldwide and every engagement is contracted in writing.