1 Half Year Results 2010

Overview

A reasonable result in challenging market

Variable conditions in a number of markets Power operations (particularly US) US Hydrocarbons (Downstream)

Canada region and Minerals & Metals result materially down on prior period

Expected this shortfall Encouraging signs in both markets for second half

Middle East continues to perform strongly

Market entry into Brazil through acquisition of CNEC

Australian Infrastructure capability strengthened with acquisition of Evans & Peck

Financial Overview

Aggregate revenue $2,548.1m down 21.7%

Net profit after tax $138.0m down 30.1%

Operating cash flow $147.5m down 37.1%

Earnings per share 56.8c/s down 30.4%

Dividend 35.5c/s fully franked

Negative FX translation impact of $10.9m

Strong financial capacity

Snapshot

Strategic push into LNG Increased number of Improve relationships Increased exposure on new LNG trains

100% renewal on all expiring major long-term contracts 4 material contract renewals Breadth and scope of long-term contracts

Sustainability solutions remain a focus

Good cost management and reduced capital expenditure in the period

Improved second half result anticipated

Safety PerformanceCATEGORY FY09 1H10

Total Recordable Case Frequency Rate*

0.11 0.15

Lost Workday Case Frequency Rate*

0.02 0.02

(* WorleyParsons applies the US OSHA reporting requirements)

MAJOR SAFETY ACHIEVEMENTS IN THE PERIOD

40 Million hours LTI free on Shell’s AOSP project

35 Million hours LTI free on Ma’aden’s Phosphate project

10 Million hours LTI free on ADGAS’s OAG 1 project

British Safety Council “Sword of Honour”

Safety Awards from Sunoco and One Steel

Houston Business Roundtable Safety Excellence Award

Nigeria DeltaAfrik HIV/AIDS Program launched

CURRENT CHALLENGES

Sustained industry growth which is translating into an expanded skills demand

An aging workforce

More construction activity and use of contractors with no industry experience

Projects are bigger, more complex and delivery times shorter

Young people are invincible!

Operations

29,100 personnel* 40 countries*Which includes 700 personnel with CNEC acquisition

Impact of Middle East Projects

UNITED STATES

NEW ZEALAND

CANADA

EUROPE

UNITED STATESChevronPhillips NCP Project SAMREF Clean Fuels,Kuwait Oil Company ProjectsRasTanura Refinery ExpansionSABIC Methyl Methacrylate/Acrylonitrile ProjectSipchem Ethylene Vinyl Acetate ProjectShah Gas Development

AUSTRALIA / NEW ZEALANDHalul Integrated Pipeline ProjectQatar Aluminium Khazzan Makaren EWTEgyphos Phosphatic Fertilizer EMAL Aluminium SmelterOman DUQM Project PDO Amal Steam Surface FacilityQatar Petroleum Power Study

CHINARas Tanura Refinery Tank FarmSAMREF Clean Fuels AMAL ProjectCNOOC LNG

CANADAGaSCO CO2 Recovery & Injection /Nitrogen Gen Plant PMCGASCO Project Management ContractNexen Petroleum EPCM ServicesShah and Habshan Railway FEED

UNITED KINGDOMChemaweyaat/ TacaamolKNPC Acid Gas Removal PlantGasco Integrated Gas Dev PMCOffshore Topside Facilities

ASIALNG Offshore Platforms and FacilitiesQatar Petroleum Power Supply FEEDQatar Petroleum Halul Submarine Power Cable

Al Khafji General Services Saudi Aramco Arabiyha Field DevelopmentMa’aden PhosphateMa’aden AluminaLondon Mining Wadi Sawawin Iron OreDubai Aluminium Sohar Aluminium Non Hydrocarbons projects

MIDDLE EAST

(Regions executing work)

LNG Projects Major strategic push to support

customers in their LNG developments

Currently we have Improve contracts covering 23 LNG trains with 8 different clients

We are executing, in our own capacity or in joint venture, projects at all stages for 17 new greenfield LNG trains

Woodside Pluto LNG – World’s First Pre-assembled LNG Plant

Improve Contract Renewals

SYNCRUDE• 5 year renewal 19 year relationship

IMPERIAL OIL• 5 year renewal 19 year relationship

TENNESSEE VALLEY AUTHORITY• 5 year renewal 19 year relationship

WOODSIDE PETROLEUM• 4 year renewal 15 year relationship

Long Term Contracts

AFRICA

UNITED STATES

NEW ZEALAND

AUSTRALIA

RUSSIA

CANADA

SOUTH AMERICA

MIDDLE EAST

EUROPE

ASIA

USA / LATIN AMERICA / CARRIBEAN43 Contracts

US Steel (New)Cogentrix Cedar Bay (New)Chevron Global Terminals (New)Tennessee Valley Authority (Renewal)AUST / NEW ZEALAND

46 ContractsAlcoa Bunbury/Wagerup (New)CS Energy Asset Management (New)Woodside North West Shelf (Renewal)Horizon Power (New)Vale Coal (New)

ASIA / MIDDLE EAST36 Contracts

Shell Malampaya (New)Brunei LNG (Renewal)Optimal Engineering and Construction Supervision Alliance (Renewal)

CANADA52 Contracts

Syncrude CoSyn (Renewal)Imperial Oil (Renewal)BP Canada (Renewal)

EUROPE / AFRICA12 Contracts

Esso Exploration Angola (New)SASOL Shared Services (New)Sembcorp Ultilities (New)Sellafield Multi Discipline Design House Services (New)

Sustainability Solutions

CNEC Overview

CNEC was part of the engineering & construction division of the Brazilian conglomerate Camargo Corrêa Around 700 people across Brazil, with

offices in Argentina and Peru

Customer base includes Petrobras, Vale and Electrobras

Established leader in hydropower within Brazil, with world class capability

Aim to become a hub for Brazil’s hydrocarbons deepwater market

Completion expected February 2010

Acquisition Price BRL 170 million (approximately $A110.0 million)

Evans & Peck overview

Evans & Peck provides high level business advisory services Around 350 employees across Australia,

with offices also in Hong Kong and Shanghai

Established leader offering strategic, commercial and contractual advice to governments and industry Water and waste water Rail services Mining and Resources

Acquisition Price total consideration of $88.5 million (cash $37.5 million and issue of new shares $51.0 million)

14 Half Year Results 2010

Financial ResultsDavid Housego

Financial Profile

$m HY09 HY10 vs. HY09 vs. 2H09

Aggregated Revenue 3,256.1 2,548.1 (21.7%) (14.1%)

EBIT 314.6 209.8 (33.3%) (27.8%)

EBIT margin 9.7% 8.2% (1.5%) (1.6%)

Net profit 197.5 138.0 (30.1%) (28.5%)

Net profit margin 6.1% 5.4% (0.7%) (1.1%)

Normalized EPS (cps) 1 87.8 62.8 (28.5%) (26.1%)

Cash flow from operating activities 234.5 147.5 (37.1%) (52.7%)

USD:AUD rate 0.788 0.869 (10.3%) (22.5%)

1 Before amortization of intangibles including tax effect of amortization expenseHY10 refers to the six months ended 31 Dec 2009; HY09 refers to the six months ended 31 Dec 2008; 2H09 refers to the six months ended 30 Jun 2009

Financial Profile

1 Aggregated revenue

Margin impacted by current market conditions

Effective tax rate down 5.9% to 25.2% due to change in earnings mix

NPAT FX translation impact $10.9m Dividend payout ratio maintained

8.1 9.0

10.6 9.7

8.2

2006 2007 2008 2009 HY10

EBIT Margin %

1,134.9 1,455.8

2,354.1

3,256.1 2,548.1 2,459.1

3,525.4

4,882.4

6,219.4

2006 2007 2008 2009 2010

Revenue 1 $m

61.894.5

152.7

197.5

138.0139.1

224.8

343.9

390.5

2006 2007 2008 2009 2010

Net profit $m

Change In Net Profit HY10 vs. HY09

197.5 (70.7)

(9.7)

(23.2)

(1.3)

15.4 1.0

39.9 (10.9)

138.0

HY09 Hydrocarbons Power Minerals & Metals Infrastructure & Environment

Corporate overhead

Net Interest Income Tax FX Impact HY10

$m

Hydrocarbons

Distribution of revenue even across regions

Significant drop in performance in the US FX impact in line with previous guidance Canadian result was well below previous

corresponding period1 Aggregated revenue2 Regions in constant currency

Revenue % of Group 71.9% 73.2% 73.8% 76.2% 73.4%EBIT Margin 8.9% 9.3% 10.8% 11.2% 10.4%

817.3 1,026.0

1,760.3 2,373.7

1,768.9

2,579.1

3,604.8

4,740.1

1,869.1

2006 2007 2008 2009 2010

Revenue 1 $m

AME 20%

ANZ 21%

Canada 24%

E&A 17%

USLAC 18%

HY10 Revenue1 % by Region

273.9258.2 '(0.1) 6.3 9.2 (16.8)

(39.1)

(23.3)194.4

HY09 2H09 AME ANZ Canada E&A USLAC FX Impact HY10

EBIT by Region HY10 vs 2H09 2 $m

Power

US remains biggest market US remains challenging due to legislative

uncertainty concerning carbon Refocus of US operation well underway.

Charge of $5 million in half year Growth in Europe driven by key nuclear

contracts1 Aggregated revenue2 Regions in constant currency

Revenue % of Group 15.0% 12.4% 9.5% 8.8% 9.7%EBIT Margin 13.0% 13.2% 13.0% 12.2% 7.6%

173.2 188.1 217.7

289.3 367.8

437.4 465.9

546.3

247.3

2006 2007 2008 2009 2010

Revenue 1 $m

AME 7%

ANZ 18%

Canada 6%

E&A 24%

USLAC 45%

HY10 Revenue1 % by Region

37.0

29.7 0.0 1.3 (0.9)4.7 (14.7)

(1.2) 18.8

HY09 2H09 AME ANZ Canada E&A USLAC FX Impact HY10

EBIT by Region HY10 vs 2H09 2 $m

Minerals & Metals

Results materially down on 1H09 as per previous guidance

Australia/New Zealand primary Minerals & Metals market; showing signs of recovery

1 Aggregated revenue2 Regions in constant currency

Revenue % of Group 8.2% 8.3% 9.6% 9.4% 9.4%EBIT Margin 13.8% 14.7% 17.0% 14.2% 11.6%

112.9 129.3

214.1

371.8

200.8

291.4

469.3

583.0

239.8

2006 2007 2008 2009 2010

Revenue 1 $m

AME 23%

ANZ 54%

Canada 9%

E&A 2%

USLAC 12%

HY10 Revenue1 % by Region

51.6

31.0 1.54.2 (5.0)

(2.1) (0.4) (1.5) 27.7

HY09 2H09 AME ANZ Canada E&A USLAC FX Impact HY10

EBIT by Region HY10 vs 2H09 2 $m

Infrastructure & Environment

Australia/New Zealand largest market

Overall segment result positive, growth from 2H09

EBIT margin remains strong

1 Aggregated revenue2 Regions in constant currency

Revenue % of Group 4.9% 6.1% 7.0% 5.6% 7.5%EBIT Margin 8.0% 9.5% 12.1% 8.6% 9.9%

31.5

112.4 162.0

221.3

121.6

214.9

342.4 350.0

191.9

2006 2007 2008 2009 2010

Revenue 1 $m

AME 21%

ANZ 47%

Canada 22%

E&A 6%USLAC 4%

HY10 Revenue1 % by Region

20.8

9.4 (0.6)

9.02.0

1.5 (1.5)(0.8) 19.0

HY09 2H09 AME ANZ Canada E&A USLAC FX Impact HY10

EBIT by Region HY10 vs 2H09 2 $m

Cash Flow

$m HY07 HY08 HY09 HY10EBITDA 141.5 263.1 354.5 252.2

Interest and tax paid (34.7) (75.0) (102.9) (132.3)

Working capital / other (33.2) (76.5) (17.1) 27.6

Net cash inflow from operating activities 73.6 111.6 234.5 147.5

Net cash outflow from investing activities (59.2) (104.0) (82.4) (51.0)Net cash (outflow)/inflow from financing activities (6.8) 10.2 (110.5) (111.1)

Key metrics:

DSO (days) 73.0 99.4 87.0 75.3

Cash from operations / net profit (%) 77.9% 73.1% 118.7% 106.9%

Cash flow from operations remains >100% of NPAT PP&E spend $27.7m in HY10, $78.3m in HY09 Dividends and acquisitions funded from existing capacity

Liquidity & Gearing

Key Metrics Jun-08 Jun-09 Dec-09

Gearing ratio 31.4% 25.5% 24.5%

Facility utilization 67.3% 54.2% 58.0%

Average cost of debt 6.1% 5.5% 5.0%

Average maturity (years) 4.6 4.1 3.9

Interest cover 11.7x 14.1x 13.4x

Net Debt/EBITDA * 1.1x 0.8x 0.9x

Bonding facility utilization 77.3% 52.9% 57.3%

Liquidity Summary $m Jun-08 Jun-09 Dec-09

Loan & OD facilities 1,094.0 1,376.1 1,260.9

Less: facilities utilized (735.9) (745.2) (731.0)

Available facilities 358.1 630.9 529.9

Plus: cash 86.0 178.3 164.6

Total liquidity 444.1 809.2 694.5

Bonding facilities 221.9 452.5 433.0

Refinanced Syndicated Facility tranche of US$60m to Feb 2011 Loan and overdraft facilities of $260.1m maturing in calendar year 2010 ($64.7m overdraft) Strong financial position: gearing of 24.5%; retain significant financial capacity

Note: includes liabilities held for sale* Rolling 12 months

24 Half Year Results 2010

Sector Review & OutlookJohn Grill

Hydrocarbons Industry Status

E&P worldwide budget for 2010 forecast to increase by 11% (Barclay’s Capital)

“For it’s part, ExxonMobil is committed to disciplined and long-term investments in technologies that hold the promise of meeting the energy challenge.”Rex Tillerson, Chairman and CEO, Exxon Mobil

“Much of our 2010 spending continues to be on large, multiyear projects consistent with our upstream growth strategies and on improving operating efficiency and reliability.”Dave O’Reilly, Chairman and CEO, Chevron Corporation (now retired)

“...our strategic plan to steadily increase oil sands production as we embark on a period of disciplined, but significant growth.”

Rick George, President and CEO, Suncor Energy

Hydrocarbons

Major current projects include:

SingaporeSingapore Parallel TrainExxonMobil

Customer Project RegionAgip / Eni Agip Project Kazakhstan

Devon Energy Jack Fish 2 Modules Canada

ExxonMobil Artukun Dagi Russia

ExxonMobil MIPS Contract Nigeria

GASCO Integrated Gas Development Projects

United Arab Emirates

Shell (Kashagan) Full Field Development Kazakhstan

SAMREF Clean Fuels Project Saudi Arabia

Shell Albian Sands Expansion 1 Canada

Shell Canada Alliance Contract Canada

Woodside Pluto LNG Australia

Woodside North Rankin 2 Australia

Hydrocarbons Outlook Major customers CAPEX budgets

increasing Stabilized crude pricing Improving world economy

LNG markets continue to expand

Middle East remains strong, with Brazil, Russia, Iraq and Western Africa continuing to offer significant new opportunities

Cost effective development of North American shale gas

Downstream development by NOC’s

Restart of Canadian oil sands projects

BP Assets Gulf of Mexico, USA

Power

Major current projects include:

Customer Project RegionLilama Vung Ang1 Coal Station Vietnam

Tuas Power Tenbusu Cogeneration Singapore

Saudi Electric Qassim and PP10 Saudi Arabia

Belene Nuclear Power Plant Bulgaria

MENR Nuclear Power Programme Armenia

OPG Biomass Conversion Canada

Siemens Oaskarsham2 Power Uprate Sweden

Southern Co Scherer Air Quality Project Upgrade

United States

Tennessee Valley Authority

Plant Support Contract United States

BHP Billiton RG6 Project Australia

Power Outlook

Bruce Power, Ontario Canada

Power market remains challenging in US, Australia and Canada Carbon uncertainty has resulted in significant

delays Reduction in power demand (US)

Market improving in Europe, Asia and the Middle East

Nuclear programs are continuing to gain pace throughout the world, including Western Europe, the Middle East and in the US

The renewables market, in particular solarwindand biofuels is growing on the back of technology development

Refocusing power operations to respond to changed markets

Minerals & Metals

Major current projects include:

Customer Project RegionBHP Billiton Cerro Matoso Furnace Colombia

EMAL Aluminum Smelter Abu Dhabi

Gindalbie Karara Iron Ore Australia

Ma’aden Alumina Saudi Arabia

Ma’aden Ma’aden Phosphate Saudi Arabia

Orica Naning Detonator Plant China

Southern Copper Toquepala Concentrator Peru

Sasol Shondoni Mine Project South Africa

Vale Inco Integrated Services Australia

Xstrata Strathcona Mill Canada

Minerals & Metals Outlook Upward revisions in many of our

customers capex budgets Outlook improving on the back of

stronger commodity prices Constraints on sustaining capital

(Improve) spend have eased considerably

Focus on Tier 1 clients and those with secured funding

Iron-ore, coal and copper continue to offer significant project opportunities

Continue to build South American presence on strong project outlook

Ma’aden Alumina, Saudi Arabia

Infrastructure & Environment

Major current projects include:Customer Project Region

ConocoPhillips APLNG Environmental Impact Study and Approvals Consultant

Australia

Doha Port Committee New Doha Port Qatar

EMAL Aluminium Smelter Abu Dhabi

Ivanhoe Oyu Tolgoi Copper Mine Infrastructure

Mongolia

Ma’aden Phosphate Infrastructure Saudi Arabia

OPR Oakajee Port and Rail Development

Australia

SAMC Ras Al Zawr Port Saudi Arabia

Water Corporation Perth Desalination - Marine Australia

Woodside Pluto Infrastructure Australia

Infrastructure & Environment Outlook

Fortescue Metals Group, Australia

Water market long term fundamentals remain strong

Increased market interest in heavy haul, metro and high speed rail in Australia and China

Coastal & Marine opportunities improving with significant opportunities emerging in Brazil, Australia, the US and the Middle East

Restarts in Minerals & Metals for ‘pit-to-port’projects

Group Outlook

While WorleyParsons confirms that our current expectations of net profit after tax for the 2010 financial year remains in the range of $280 million to $320 million, we are encouraged by increasing activity in a number of regions and customer sector groups supporting our view of a moresignificant weighting of earnings in the second half of the financial year.

The company is confident that its medium-term and long-term prospects remain positive based on its competitive position and strong financial capacity.

35 Half Year Results 2010

Appendix - FX Translation Impact

Currency Annualized AUD $m NPAT translation impact of 1c ∆

AUD:USD 1.2

AUD:GBP 0.8

AUD: CAD 0.9

Currency HY09 HY10 FY09 ∆

AUD:USD 78.8 86.9 (10.3%)

AUD:GBP 44.9 53.0 (18.2%)

AUD: CAD 87.1 93.7 (7.6%)

60.065.070.075.080.085.090.095.0

100.0105.0110.0115.0120.0

Jun-

08

Aug-

08

Oct-0

8

Dec-

08

Feb-

09

Apr-0

9

Jun-

09

Aug-

09

Oct-0

9

Dec-

09

Movement in Major Currencies

USD GBP CAD

AME 19%

ANZ 25%

Canada 21%

E&A 16%

USLAC 19%

HY10 Revenue1 % by Region

1 Aggregated revenue

FX translation impact ~$11m net profit HY10 vs. HY09