MEP design engineer

I design hydronic heating, plumbing and water treatment systems, and model them in Revit MEP. The projects below are complete builds: calculations, equipment selection, and a coordinated 3D model for each.

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Portrait of Abbass Darwish, a man with short dark hair and a beard, in an olive blazer over a white T-shirt, with a city skyline behind him

Based in: Beirut, Lebanon
Education: M.Sc. Mechanical Engineering, Lebanese International University, 2025
Tools: Revit MEP, AutoCAD, HAP, BIM
Languages: English (fluent), Arabic (native)
Looking for: MEP design engineer roles

Revit 3D view of a three-level villa with underfloor heating loops in red and green running across each floor, connected to wall-mounted manifolds and a plant room — **Villa underfloor heating.** Loop layout and manifold distribution across all levels.

Projects

Villa underfloor heating

Underfloor heating for a three-story villa. Heat loss was calculated room by room with the U-value method, for 18–22 °C indoors against a 2 °C outdoor design temperature. Loops are zoned onto four manifolds placed per floor, serving single- and dual-room zones, and the full circuit is modeled in Revit.

System: Hydronic underfloor heating
Software: Revit MEP
Scope: Room-by-room heat loss, loop layout, manifold zoning
Design: 18–22 °C indoor, 2 °C outdoor
Manifolds: 4, single- and dual-room zones
Date: Sep 2026

Revit floor plan with underfloor heating loops drawn in red and green inside each room, with manifolds along the corridor — **Floor plan.** Loop layout per room with manifold locations.

Revit 3D view of the villa host model showing basement, ground and first floor levels — **Host building.** Basement, ground and first floor.

Boiler room and pump station

The mechanical room for the same villa: a wall-mounted plant with a boiler, buffer and expansion vessel, a domestic hot water calorifier, and six circulator branches feeding the heating circuits. The boiler is sized to the space heating and calorifier demand with a safety margin, and each circulation pump is sized from its loop's flow rate and friction-loss pressure drop.

System: Hydronic heating plant and DHW
Software: Revit MEP
Scope: Boiler and pump sizing, plant layout, boiler and DHW supply and return piping
Date: Sep 2026

Revit 3D view of the plant room inside the villa basement, with a boiler, cylinder, expansion vessel and a row of circulator pumps on a wall panel — **Plant room in the villa.** Boiler, cylinder and circulator branches placed within the building.

Revit 3D view of the plant room equipment on a panel, with a boiler on the right, six red circulators in a row and a hot water cylinder on the left — **Plant equipment.** Isolated view of the boiler, circulators and cylinder.

Reverse osmosis water treatment plant

Water systems for a 32-unit, eight-floor residential building of 128 occupants. Domestic water is sized to UPC fixture-unit demand. An RO plant with three-stage treatment (chlorination, filtration, UV post-treatment) runs a fixed six-hour batch cycle that covers the full daily demand, filling a ground-level buffer tank with rooftop booster distribution. Sizing calculations were built in an Excel workbook.

System: Potable water treatment and distribution
Software: Revit MEP, Excel
Building: 32 units, 8 floors, 128 occupants
Treatment: RO, 3 stages, 6-hour batch cycle
Date: Aug 2026

Revit 3D view of a reverse osmosis plant with three blue treatment vessels, storage tanks, pumps and white membrane housings on a slab — **Plant overview.** Treatment vessels, tanks, pumps and membranes on the plant slab.

Second Revit 3D angle of the reverse osmosis plant showing the tank, membrane housing, pump set and blue vessels — **Process side.** Second angle on the membranes and pump set.

Revit plan view of the reverse osmosis plant with piping in blue and equipment outlines — **Plan view.** Equipment and piping layout.

Sewage and wastewater treatment

For the same 128-occupant building: independent sewage (activated sludge) and wastewater (aeration) treatment trains, both sized to full occupancy. The treatment tank is modeled with its aeration diffuser grid, blower, settling compartment, submersible pump and the chemical dosing and inlet piping around it.

System: Sewage and wastewater treatment
Software: Revit MEP, Excel
Scope: Tank sizing, aeration layout, piping
Sized for: 128 occupants, full occupancy
Date: Aug 2026

Transparent Revit 3D view of a sewage treatment tank showing the aeration diffuser grid on the tank floor, settling compartment, blower and piping — **Inside the tank.** Diffuser grid, settling compartment and equipment on the tank edge.

Revit plan view of the sewage treatment tank with rows of circular aeration diffusers and green and blue piping — **Plan view.** Diffuser grid layout.

Second transparent Revit 3D angle of the sewage treatment tank with diffusers and piping — **Second angle.** Tank, diffusers and pipe routing.

Revit 3D view of the sewage treatment tank exterior with walls, baffles and equipment on the tank edge — **Tank exterior.** Concrete walls and baffles.

Villa HVAC and plumbing

Full HVAC and plumbing design for a three-floor, 200 m² villa, modeled in Revit MEP.

System: HVAC and plumbing
Software: Revit MEP
Building: 3 floors, 200 m²
Date: 2025

Skills

Design

HVAC load calculationsHAP and ASHRAE methods
HVAC and hydronic heatingRadiator and underfloor systems
Plumbing and water systemsWater treatment, wastewater, irrigation, pools
Duct and pipe sizing, equipment selection
Heat loss calculationU-value method, room by room
Manifold zoning and mechanical room sizing

Modeling and site

Revit MEP
AutoCAD
BIM coordinationClash detection
Excel design workbooksSizing and schematic tabs
Site inspectionCode compliance checks

Training

Advanced Water Systems (Revit Plumbing)Autodesk-certified course, Aug 2026, certificate pending
Heating Systems Design (Revit)Radiator and underfloor modules, Sep 2026, certificate pending
Revit MEP FundamentalsQuest Construction, 2025

Background

Experience

Modern Energy Company (MEC), BeirutHVAC design and field engineering intern, Oct 2023 – Jun 2024

HVAC and plumbing design for a 10-floor mixed-use building: HAP load reports, ductwork and water schematics, plus weekly site inspections on four active projects, including a hospital.

Association of Energy EngineersMechanical engineering intern, Jul – Sep 2023

Villa load analysis using HAP and ASHRAE methods.

MOST GroupEngineering intern, steel fabrication, Jun – Aug 2023

Education

M.Sc. Mechanical EngineeringLebanese International University, June 2025, GPA 3.27

Thesis: FEM topology optimization of a 3D-printed prosthetic leg pylon in ANSYS.

B.Sc. Mechanical EngineeringLebanese International University, June 2023, GPA 3.30

Contact

I am looking for an MEP design engineer role in Lebanon. Message me and I will send drawings, calculations or the full models on request.

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+961 71 452 889
abbassdarwish11@gmail.com