< Chemical Process Engineering />< Process Engineering />

I'm Hazem Mensi.

CHEMICALPROCESS ENGINEER.

Chemical Process Engineering student at INSAT (Institute of Applied Sciences and Technology) and an Aspen Certified Expert User in Aspen HYSYS. Having completed 3 rigorous industrial engineering internships (OMV, Air Liquide, EPPM), I bring a verified technical background focused on the Energy Industry, Chemical Plants, EPCs, Energy Transition, and Renewable Fuels. Actively seeking a 4–6 Month Graduation Internship starting February 2027.

Aspen HYSYS® Certified Expert UserAPI 520 / 521, ASME Sec VIII & Shell DEPAvailable for Graduation Internship (Starting Feb 2027)

Strategic Target Sectors & Engineering Focus:

Energy Industry & HydrocarbonsChemical & Petrochemical PlantsEPCs & Engineering ConsultanciesEnergy Transition & CCUSRenewable Fuels & Clean H₂

Get in Touch Download Resume (PDF)View Career Trajectory Telegram @hazemensi

|Tunis, Tunisia • Open to Global & Regional Mobility

University

5 Verified Accreditations

Aspen Certified Expert User in Aspen HYSYS®

CERT 00016555 • Issued: July 23, 2025

View PDF|Verify Record

Core Engineering Arsenal

EPPM Industrial Engineering Competencies

4 Core Disciplines • Feasibility to PMC

01 //API 520 / 521 Standard

Standard Verified

Overpressure Protection & Relief Systems

Safety Relief Valve (PSV) Sizing & Header Hydraulics

Execution of critical relief valve and header line sizing for the Marsa El Brega grassroots gas plant project, adhering rigorously to international safety codes.

Critical gas & liquid orifice sizing calculation sheets

Inlet 3% pressure drop & outlet backpressure limits

Grassroots gas processing plant feasibility

Process datasheets for relief valves & rupture disks

Project: Marsa El Brega (Libya) • Client: Taknia (TLEC) / SOCCodes: API 520 Part I & II • API 521 / ISO 23251

02 //HYSYS Dynamics

Dynamic Model

Dynamic Simulation & Flow Assurance

Transient Plant Sizing & Operations

Modeling complex unsteady-state behaviors to prevent pipeline blockage and surge vessel overflow during critical operations.

Dynamic transient startup modeling & valve ramp rates

Hydrate dissociation mitigation curves in HYSYS Dynamics

Slug catcher dynamic surge reception & liquid level control verification

Slug Catcher DynamicsHYSYS Upstream

03 //FLARENET & FKOD

Radiation Validated

Blowdown & Flare Network Systems

Staggered Depressuring & Radiation Analysis

Flare network hydraulic ratings and thermal radiation safety modeling to prevent backpressure overloads and hazardous thermal fluxes.

Staggered blowdown analysis & dynamic depressuring

FLARENET header hydraulic backpressure & API 521 stack radiation analysis

Flare Knock-Out Drum (FKOD) sizing & process datasheets

Stack Height & RadiationAspen Flare Analyzer

04 //PMC Auditing

EPC Audit Completed

Oilfield PMC Auditing & Technical Governance

Design Basis, Separator Calculation Books & Hydraulics

Technical review and auditing on behalf of the project management consultant (PMC) for regional oilfield rehabilitation, verifying EPC contractor calculations.

Process design basis & criteria document auditing

Separator calculation books & datasheet verification

PIPESIM multiphase hydraulics & pressure gradient review

Technical Query (TQ) management & discrepancy logs

Project: Naft Khana Rehabilitation (Iraq)Role: Process Engineering PMC Auditor

Industrial Experience, Verified Credentials & Design Standards Affiliations:Industry Experience & Affiliations:Continuous Verified Affiliations

// Experience•Chronological Engineering Trajectory

Industrial experience & career progression.

A chronological progression of technical maturity – advancing across 3 industrial engineering internships: OMV sour gas FEED, Air Liquide cryogenic operations, and EPPM grassroots EPC feasibility & PMC auditing.

Engineering Progression TrajectoryChronological Scope Expansion (2025 – 2026)

OMV MilestoneJun – Jul 2025

OMV Production

Nawara CPF Amine Sweetening Tie-In • 1.86 mol% CO₂ & 3500 kW Duty (FEED)

Nawara CPF Sweetening2 Months • Done

Air Liquide MilestoneJul – Aug 2025

Air Liquide

Cryogenic Plant Operations & DCHE Column Retrofit

Plant HSE & Revamp2 Months • Done

EPPM MilestoneJan – Aug 2026

EPPM Detailed Engineering

Grassroots Gas Plant Feasibility & Regional PMC Auditing

API 520/521 & PMC8 Months • Done

EPPM (ENGINEERING PROCUREMENT & PROJECT MANAGEMENT)

EPC Detailed Engineering & PMC Auditing · Completed

Process Engineering Intern • Tunis, Tunisia · Hybrid

Jan 2026 – Aug 2026 · 8 months

Detailed feasibility study engineering for grassroots gas processing facilities and PMC technical auditing for major regional oilfield rehabilitation.

Project 1: Detailed Feasibility Study of New Gas Plant at Marsa El Brega (Libya)

Client: Taknia Libya Engineering Company (TLEC) · Final Client: Sirte Oil Company (SOC)

▪Delivered process feasibility study engineering for Client: Taknia Libya Engineering Company (TLEC) & Final Client: Sirte Oil Company (SOC)
▪Safety Valve Sizing, Inlet/Outlet Line Sizing as per API 520 / 521
▪Staggered Blowdown Analysis & Dynamic Depressuring to 50% Design Pressure at 15 min (API 521) in Aspen HYSYS Dynamics & Steady-State
▪Flare Network Design in Aspen Flare System Analyzer (FLARENET), Flare Stack Height and Radiation Analysis
▪Flare Knock-Out Drum (FKOD) Sizing and Process Datasheet Preparation
▪Heat exchanger thermal design using Aspen EDR (HTFS)
▪Process Datasheet Preparation for Heat Exchangers and Knock Out Drums
▪Heat and Material Balance calculations in Aspen HYSYS & Aspen Simulation Workbook (ASW)
▪Pump Hydraulics, NPSH Calculations, and Process Datasheet Preparation

Project 2: Naft Khana Oilfield Rehabilitation Detailed Engineering PMC (Iraq)

▪Critically audited EPC contractor process design basis, equipment datasheets, and separator sizing calculations against API 12J and project design criteria
▪Multiphase Flowline Hydraulics and Line Sizing Verification in PIPESIM & Aspen HYSYS Upstream
▪Dynamic Transient Startup and Hydrate Mitigation Review in HYSYS Dynamics
▪Topside slug catcher surge reception and liquid level control verification in HYSYS Dynamics
▪Technical Query (TQ) Management and EPC Discrepancy Escalation

Engineering Codes & Design Standards:

API 520 Parts I & IIAPI 521 / ISO 23251API 14EGPSA Engineering Data BookTEMAASME Sec VIII

Tangible Engineering Deliverables:

Safety Relief Valve (PSV) Sizing Schedules & Line Sizing Check Sheets
Staggered Blowdown & Dynamic Depressuring Calculation Reports
FLARENET Header Hydraulic Verification & API 521 Flare Stack Radiation Study
Flare Knock-Out Drum (FKOD) & Heat Exchanger Process Datasheets
PMC Technical Audit Review Sheets on EPC Separator Calculations
Multiphase Flowline Pressure Profiles & Hydrate Mitigation Envelopes

Stack:Aspen HYSYS DynamicsAspen HYSYS Steady-StateAspen Flare System Analyzer (FLARENET)Aspen EDRPIPESIMAPI 520 / 521TEMA StandardsASME Sec VIII

Air Liquide

Operations & Process Intensification

Operations Engineering Intern • Ben Arous, Tunisia · On-site

Jul 2025 – Aug 2025 · 2 months

Direct Contact Heat Exchanger (DCHE) thermal retrofit in cryogenic Air Separation Unit (ASU) and industrial cooling water management (Internal Plant Operations).

Direct Contact Heat Exchanger Retrofit & Industrial Operations

▪Spearheaded the hydraulic retrofit of a direct contact heat exchanger in Sulzer Sulcol, KG-Tower, and Aspen Plus; modeled high-performance structured and modern random packings (FLEXIPAC® HC 2Y, MellapakPlus™ 252.Y, NeXRing™ 2), achieving an 85% pressure drop reduction, maximized flooding margins, and expanded hydraulic throughput.
▪Managed industrial water cooling systems with 100% regulatory compliance. Oversaw inspections, quality testing, and maintenance scheduling to ensure continuous operational reliability.
▪Enforced strict HSE protocols for cooling towers with 100% safety compliance. Rigorously utilized specialized PPE and respiratory protection during high-stakes plant operations.

Engineering Codes & Design Standards:

Cooling Technology Institute (CTI) StandardsTEMA StandardsAir Liquide Industrial Safety Guidelines

Tangible Engineering Deliverables:

Column Internals Hydraulic Rating Report & Flooding Margins
Structured Packing Specification Sheet & Liquid Distributor Schedule
Cooling Water Quality Logsheets & Preventive Maintenance Protocol
Brownfield DCHE Revamp Engineering Report

Stack:Sulzer SulcolKG-TowerAspen PlusFLEXIPAC® HC 2YMellapakPlus™ 252.YNeXRing™ 2CTI StandardsIndustrial Water SystemsPlant HSE Protocols

OMV

FEED Gas Sweetening & Thermodynamics

Process Engineering Intern • Tunis, Tunisia · On-site

Jun 2025 – Jul 2025 · 2 months

Front-End Engineering Design (FEED) for the Amine Sweetening Tie-In project at the brownfield Nawara CPF (Internal Asset Operations), improving CO₂ removal to 1.86 mol% while cutting reboiler duty to 3500 kW through rigorous HYSYS & ProMax solvent optimization.

Nawara CPF Amine Sweetening Tie-In & Solvent Optimization

▪Supported FEED for the Amine Sweetening Tie-In project serving 3 new gas wells at the brownfield Nawara CPF. Modeled systems in BR&E ProMax and Aspen HYSYS, developing PFDs and preliminary P&IDs using AutoCAD P&ID and Bluebeam Revu.
▪Developed Heat and Material Balances (HMBs) and optimized the Acid Gas Removal Unit (AGRU) in HYSYS & ProMax, improving CO₂ removal to 1.86 mol% (<3 mol%) using a 40 wt% MDEA + 2 wt% piperazine solvent blend.
▪Enhanced energy efficiency by cutting regenerator reboiler duty to 3500 kW while maintaining a 0.45 mol/mol CO₂ loading in the rich amine stream, effectively balancing performance and OPEX.
▪Conducted production lifecycle analysis for well start-up and decline scenarios, aligning solvent circulation rates with transmission pipeline delivery constraints and Wobbe index limits.

Engineering Codes & Design Standards:

GPSA Section 21 (Hydrocarbon Treating)API RP 945 (Amine Units)Shell DEP & NACE MR0175 / ISO 15156

Tangible Engineering Deliverables:

Optimized Heat & Material Balances (H&MB) for 3 Well Lifecycle Scenarios
Process Flow Diagrams (PFDs) with Stream Tables
Preliminary P&IDs for Amine Contactor and Stripper Loops
Amine Regenerator Reboiler Process Datasheet

Stack:Aspen HYSYSBR&E ProMaxAutoCAD P&IDBluebeam RevuMDEA SweeteningGPSA Sec 21

// Engineering Portfolio•6 Rigorous Case Studies

Engineering & systems case studies.

Quantified industrial case studies spanning grassroots EPC safety, brownfield FEED gas sweetening, cryogenic column retrofits, and computational process automation.

Plant Safety & Transient SimulationEPPMClient: Taknia Libya Engineering Company (TLEC) · Final Client: Sirte Oil Company (SOC)

Jan 2026 – Aug 2026•STUDY #01

Detailed Feasibility Study: Dynamic Depressuring, Staggered Blowdown & Flare Network Design

Executed comprehensive blowdown analysis and dynamic depressuring in Aspen HYSYS Dynamics and steady-state to model peak relief loads, thermal shrink, and low-temperature metallurgy risks for the "Detailed Feasibility Study of New Gas Plant at Marsa El Brega" project (Client: Taknia Libya Engineering Company – TLEC; Final Client: Sirte Oil Company – SOC), followed by full flare network hydraulic backpressure analysis in Aspen Flare System Analyzer (FLARENET) and flare stack radiation sizing per API 521.