Hydraulic modelling
Steady state and extended period simulation of potable, recycled and sewer networks. Model build, calibration, scenario testing and optioneering for capacity, pressure management and phasing.
Water infrastructure engineering
Hydraulic design and technical assurance for water networks.
Oliver Consulting d.o.o. is a civil engineering practice for water infrastructure. We support utilities, contractors and design teams with hydraulic modelling, surge analysis, design review and commissioning of potable, recycled and wastewater systems. Twelve years of delivery across Croatia, Ireland and Saudi Arabia.
Chartered civil engineer, Croatian Chamber of Civil Engineers (HKIG). Member, Engineers Ireland (MIEI).
12+
Years in water and wastewater infrastructure
3
Countries of delivery: Croatia, Ireland, Saudi Arabia
30+
Projects under technical review each year
225,000 m³
Largest reservoir reviewed; mains to DN1200
Services
Engineering support across the full project lifecycle
From strategy and master planning through concept and detailed design to construction, commissioning and take-over. The work is civil and hydraulic engineering; mechanical, electrical and ICA disciplines are coordinated and reviewed, not designed in house. Delivered in English or Croatian, remotely or on site.
Surge and transient analysis
Transient assessment of trunk mains and pumping systems, sizing of surge protection and de-risking of capital designs before construction. Analyses delivered on mains up to 13.2 km.
Design assurance and technical review
Independent review of design deliverables against employer requirements, standards and constructability. Multidisciplinary comments consolidated into a single aligned position for the delivery team.
Network and pipeline design
Water supply, recycled water and sewerage schemes: rising mains, gravity sewers, district metered areas, storm and sanitary analysis, bills of quantities and design risk assessment.
Reservoirs, tanks and pumping stations
Storage and pumping design and review, from booster stations and storm holding tanks to strategic reservoirs, including pump duty selection, operating levels and hydraulic profiles.
Commissioning, take-over and interfaces
Commissioning support, method statement and O&M review, snag lists, walkthroughs and handover of completed assets from construction to operations, plus interface management between design, construction and client teams.
Experience
Led by Matija Oliver, chartered civil engineer
Civil engineer with an MSc in hydraulic engineering, chartered with the Croatian Chamber of Civil Engineers (HKIG) and a member of Engineers Ireland (MIEI). His work is in civil and hydraulic engineering for water infrastructure. The record below covers work delivered in his engineering roles to date.
Aug 2022 to present
NEOM, Saudi Arabia
Oxagon, Archipelago & Magna
Oxagon, Archipelago & Magna
Technical Interface Manager, Water Infrastructure
An 8 billion SAR (about 2 billion euro) water infrastructure programme
- Directs a multidisciplinary team of six Principal Engineers (structural, mechanical, hydraulic, civil, electrical, ICA) providing technical assurance for potable transmission, distribution and storage, and for recycled water (TSE) distribution across three NEOM regions.
- Lead reviewer for more than 70,000 documents across 30+ projects annually, from strategy and master plans to detailed design, construction, commissioning and take-over documentation, consolidating conflicting multidisciplinary feedback into single aligned positions.
- Delivered around 2.5 million euro in construction cost savings by reviewing and hydraulically optimising the Zone N sitewide network, reducing pipe sizes through simple pressure control validated in the hydraulic model.
- Authored the hydraulic modelling guidelines adopted as the reference document for potable network design across the programme.
- Developed and presented a network resiliency calculation methodology at the Optimatics conference in London, combining burst simulation and isolation to repair sequences with hazard likelihood to quantify customer minutes lost.
- Led an energy recovery feasibility study assessing inline turbines as an alternative to pressure reducing valves.
- Established the take-over function for completed assets; 11 assets handed over from construction to operations to date.
Dec 2017 to Aug 2022
Ryan Hanley Ltd., Ireland
incl. Stantec UK secondment, 2021
incl. Stantec UK secondment, 2021
Senior Project Engineer
Irish Water schemes and UK wastewater modelling
- Delivered hydraulic design, surge analysis and pumping station and reservoir design on major Irish Water schemes, covering rising mains to DN900, pumping stations to 510 l/s and storm storage to 1,230 m³.
- Carried out surge and transient analyses on trunk mains up to 13.2 km, confirming surge protection requirements and de-risking capital designs prior to construction.
- Led planning applications, CPO reporting, design risk assessments and statutory and client liaison on multi-stakeholder schemes.
- On secondment to Stantec UK, built baseline hydraulic models for three wastewater treatment works (around 660,000 PE combined) and identified optimisation measures adopted into asset improvement plans.
Feb 2014 to Nov 2017
Hidro Consult, Rijeka, Croatia
Project Engineer
Coastal water supply and sewerage
- Designed water supply and sewerage schemes exceeding 20 km of pipeline across coastal Croatia, including pump stations, storm tanks and CSO structures, from feasibility through detailed design and bills of quantities.
- Developed a CCTV survey based rehabilitation strategy for 5.3 km of sewer and 3.3 km of water network in Pula, using multi-criteria analysis to select the most cost effective technologies.
- Contributed to the design of the Stoja Pula wastewater treatment plant (104,000 PE), including load calculations and 3D design.
Selected projects
Assets and schemes delivered or reviewed
A cross section of the work behind the services above, from giga-project storage and transmission to municipal networks and treatment.
Oxagon Central Reservoir, NEOM
170,000 m³
Technical assurance from detailed design through construction and commissioning.
Oxagon Industrial Quarter Reservoir, NEOM
225,000 m³
Pre-concept design review of the largest storage asset in the programme reviewed to date.
Oxagon Industrial Quarter tanks, NEOM
50,000 m³
Detailed design review of tank hydraulics and operating regime.
Transmission watermain diversion, Oxagon Industrial Quarter
DN1200 carbon steel
Coordinated design reviews and commissioning of a live trunk main diversion.
Zone N sitewide potable network and Oxagon Zones O, P and Q
To DN1200
Design review, hydraulic optimisation and interface coordination; pressure control reduced pipe sizes and construction cost.
Magna sitewide potable and recycled water systems, NEOM
180+ km, 5 × 10,000 m³
Network and storage review across a sitewide potable and TSE distribution system.
Athlone water treatment plant upgrade, Ireland
Pumps 27 to 185 l/s
Early contractor involvement: hydraulic calculations and profile through the proposed extension, raw and treated water pump assessments.
Barrow Water Supply Scheme, area extension
7 and 230 l/s
Design build: two booster stations, DN450 watermain, four scenario hydraulic model and SuDS modelling at Brannockstown.
Upper Liffey Valley Sewerage Scheme
To DN900, 70 to 510 l/s
Design build: foul gravity mains, three pumping stations and two storm holding tanks (850 m³ and 1,230 m³), with Revit and Civil 3D modelling.
Tallanstown rationalisation
Two booster stations
Planning application, CPO report, appropriate assessment and archaeological screenings, design risk assessment.
Kinsealy wastewater pumping station
55 l/s
HDPE 280 mm rising main design and modelling, pumping station and emergency storage tank design.
Stoja Pula wastewater treatment plant, Croatia
104,000 PE
Wastewater quantity and population equivalent calculations and 3D design input.
Pula network rehabilitation strategy
5.3 km sewer, 3.3 km water
CCTV survey based condition assessment and multi-criteria selection of rehabilitation technologies.
On site
Water assets in construction and commissioning
Photographs from works our principal engineer has been involved in: pumping stations, storage, transmission mains and valve chambers.
Capabilities
Software, qualifications and working languages
Modelling and analysis
- EPANET
- Bentley WaterGEMS and SewerGEMS
- Bentley HAMMER
- SWMM, storm and sanitary analysis
- HADES
Design and GIS
- AutoCAD Civil 3D and LT
- Revit
- Urbano
- QGIS and ArcGIS
- Lumion
Qualifications
- MSc Hydraulic Engineering, University of Osijek, 2013
- BSc Civil Engineering, University of Osijek, 2011
- Chartered Engineer, HKIG, 2016
- MIEI, Engineers Ireland
Site and languages
- FÁS Safe Pass (2021)
- FETAC Level 5 Occupational First Aid (2021)
- ATEX
- Croatian (native), English (fluent)
Contact
Tell us about the scheme
Send a short description of the project, the stage it has reached and the support you need. Enquiries are answered in English or Croatian.
matija (at) oliver-consulting.hr- Company
- Oliver Consulting d.o.o.
- Registered office
- Bana Josipa Jelačića 58
35403 Rešetari, Croatia - Principal
- Matija Oliver
- OIB (VAT ID)
- 84910107717