M ICHAEL B AKER C ORPORATION

1. MICHAEL BAKER CORPORATION 2004 Investor Relations Presentation IPAA Oil & Gas Investment SymposiumApril 19, 2004

2. Safe Harbor Note with respect to Forward-Looking Statements: This presentation of Financial Review and Operations Review contains forward-looking statements concerning future operations and performance of the Company. Forward-looking statements are subject to market, operating and economic risks and uncertainties that may cause the Company’s actual results in future periods to be materially different from any future performance suggested herein. Factors that may cause such differences include, among others: increased competition, increased costs, changes in general market conditions, changes in industry trends, changes in the regulatory environment, changes in anticipated levels of government spending on infrastructure, and changes in loan relationships or sources of financing, changes in management, and changes in information systems. Such forward-looking statements are made pursuant to the Safe Harbor Provisions of the Private Securities Litigation Reform Act of 1995.

3. Company Overview • Leader in Professional Services • Transportation and Civil Infrastructure Engineering • Oil & Gas Production Operations & Maintenance • Well Positioned for Revenue Growth • Expanding Onshore Opportunities for Operations & Maintenance Services • Strong Defense and Homeland Security Spending • Transportation Spending Bill Pending • Record Backlog Exceeding $1.0 Billion

4. Performance of Core Businesses Guidance

5. Growth Strategy • Maximize The Growth Potential Of Our Business Segments • Optimize The Profitability Of Our Services Through Business Process Excellence • Innovate The Methods In Which We Deliver Our Services To Our Clients • Leverage The Skills And Relationships Of The Entire Company

6. Revenue Visibility—Backlog As of December 31, 2003 Does Not Include FEMA or Iraq CM Contracts (> $750 Million)

7. 2004 Earnings Guidance EPS

8. Energy Markets and Services Total Asset Management Houston Lafayette Supply Chain Management Anchorage O&M Services London Lagos Manpower Caracas SERVICES LOCATION Training Bangkok Abu Dhabi Recruiting Trinidad Operations Engineering CUSTOMERS Algeria Major and Independent Oil & Gas

9. Energy Growth Markets • Onshore Managed Services • Deepwater Gulf of Mexico • International

10. Managed Services Market Potential

11. Energy Market Dynamics and Transitions - Gulf of Mexico • Small and Mid-Size Independents Purchasing Shelf Properties • Major and Large Independents Moving from Shelf to Deepwater and/or International S H E L F – Mid to Small Size D E E P W A T E R Baker’s Deepwater Projects • Petronius • Typhoon • Neptune • Gunnison • Boomvang • Morpeth • Allegheny • Canyon Station • Genesis • Horn Mountain • Thunderhorse • Atlantis • Mad Dog • Holstein • Nakika • Marlin • Pompano

12. Energy Market Growth Drivers • Onshore Presents New Opportunities for Managed Services Powder River Basin Panhandle, Anadarko and Hugoton Basins Permian Basin San Juan Basin Green River Basin

13. Energy Market Growth Drivers • Onshore Huber Energy • Two Managed Services Agreements • Texas Panhandle & Powder River Basins • $144 Million, 4 Years • Performance-Based • 8% to 12% Margin Potential

14. Energy Market Growth Drivers Texas Panhandle

15. Kazakhstan London Algeria South Korea People’s Republic of China Venezuela Israel Mexico Trinidad Egypt Thailand Nigeria Chad Ecuador Equatorial Guinea Angola Energy Market Growth Drivers—International Opportunities

16. Energy Sector – Recent Project Awards • Chevron Offshore Limited - Thailand • O&M of Tantawan and Benchamas Fields in the Gulf of Thailand • 5-Year Contract Renewal Worth $6 Million Per Year • Largest, Most Comprehensive O&M Contract Assignment in the Gulf of Thailand • Development and Implementation of Nationalization and Training Programs • Nigeria LNG • $8.5 Million Per Year Contract • Comprehensive Maintenance Services for Bonny Island LNG Plant • Training and Nationalization Programs • Burlington Resources - Algeria • $5 Million Per Year Contract • O&M Support for Pre-commissioning, Commissioning and Operational Phases of the MLN Field at Berkine • Recruitment, Assessment, and Training of Algerian Nationals Kazakhstan Algeria Thailand Venezuela Nigeria Angola • Others: • Karachaganak Petroleum Operating (KPO) – Kazakhstan • Ameriven Hamaca Project – Venezuela • Kizomba Surface Wellhead Platform (SWHP) – Offshore Angola

17. Focused Engineering Practice Areas • Transportation • Federal Sector • Department of Defense • Civilian

18. Federal Sector Growth Drivers BUDGETS Department of Homeland Security Department of Defense Source: Homeland Security, Budget in Brief, Fiscal Year 2005 ( www.dhs.gov ) Source: United States Department of Defense, News Release (02.03.03), ( http://www.defenselink.mil/news )

19. Federal Sector Growth Strategies • Broader and Deeper with Existing Clients • Secure Program Management/Mission Support Opportunities • Leverage Engineering/Energy Expertise

20. Federal Sector – Recent Project Awards • Federal Emergency Management Agency • Up to $750 Million, 5-Year Contract • Multi-Hazard Flood Map Modernization • Major Program Management Role • 10 Regional Management Centers Across U.S. • Performance-Based • US-VISIT • +/- $11 Million in Pending Projects • Exit/Entry Assessment/Planning Engineering • Land/Air/Water Points of Entry

21. Federal Sector – Recent Project Awards • Iraq Construction Management – U.S. Army COE/CPA • $1.2 Billion, 5-Year, ID/IQ Contract • Stanley Baker Hill Joint Venture • CM Services for Iraq Reconstruction • Leveraging Engineering/Energy Expertise • U.S. Army COE – Central Command • $1.5 Billion, 5-Year, ID/IQ Contract • Sub to Parsons Corp. • Operations/Facilities Support in Central Asia, Middle East, Horn of Africa • Planning, Design, Procurement, Logistics, Design-Build

22. Federal Sector – Recent Project Awards • U.S. Air Force Center for Environmental Excellence • $2.1 Billion, 5-Year ID/IQ Contract • Design-Build Team with Sundt Construction • A/E Services at DoD Facilities Worldwide • One of 9 Teams • Base Realignment and Closure (BRAC) • $1.0 Billion Program • Honey Lake Parcel in California • First Conservation Conveyance of U.S. Army Property • $4.0 Million Program Management/Technical Services Contract • Other Opportunities Identified

23. Transportation Market Growth Drivers • TEA-21 Reauthorization Legislation • President: $256 Billion • House: $275 Billion • Senate: $318 Billion • Key Baker States Continuing to Award Work • Recent Project Wins • Indiana I-69 Design • Ironton-Russell Bridge Design • Fulton Road Bridge Design (Ohio) • Utah Transit Authority Commuter Rail Design • New York State DOT Construction Management of Three Bridges • Environmental On-Call Services for Houston District of TexDOT (renewal) • Engineering Open End for District 12 of PennDOT

24. MICHAEL BAKER CORPORATION Financial Overview

25. Total Contract Revenues (in millions) $426.0 $405.2 $401.8 2001 2002 2003 2004 Guidance

26. Income From Operations (in millions) $22.8 $16.9 $7.8 2001 2002 2003 2004 Guidance

27. Operating Performance (in thousands)

28. Earnings Per Share

29. Cash Flow (in millions)

30. Stock Performance (24 Months) Closing Share Price

31. Balance Sheet (in millions)

32. Conclusion • Maximize Growth • Energy • Expand Position in Markets with Long-Term Investment Strategy (Onshore, Deepwater, International) • Enhance Competitive Position in Historical Markets Via Cost Containment/Reduction (GOM Shelf) • Engineering • Continue to Pursue Federal Sector Projects • Position in Key States for Renewed Transportation Funding • Invest Strategically in Growth Markets

33. Revenue Visibility—Backlog As of December 31, 2003 Does Not Include FEMA or Iraq CM Contracts (> $750 Million)

34. MICHAEL BAKER CORPORATION 2004 Investor Relations Presentation IPAA Oil & Gas Investment SymposiumApril 19, 2004