PGR Doherty-Bigara (Pat)
PGR Doherty-Bigara (Pat)
PGR Doherty-Bigara (Pat)
Professional Engineering Design & Certification Support
Independent Certifications
& Approvals
Professional Engineering Design & Certification Support
Mechanical and structural engineering services providing practical solutions, technical expertise and professional support across a wide range of projects.
Mechanical and structural engineering services providing practical solutions, technical expertise and professional support across a wide range of projects.
From initial design and engineering calculations to technical assessments, verification and compliance documentation, Pat provides tailored engineering assistance for both small and large projects.
Have an engineering project or need professional advice? Contact Pat to discuss your requirements and request a quotation.
From initial design and engineering calculations to technical assessments, verification and compliance documentation, Pat provides tailored engineering assistance for both small and large projects.
Have an engineering project or need professional advice? Contact Pat to discuss your requirements and request a quotation.
Engineering Design
Verification & Assessment
Engineering Calculations
Compliance Documentation
Structural Engineering
Certification Support
Engineering Design
Verification & Assessment
Engineering Calculations
Compliance Documentation
Structural Engineering
Certification Support
Engineering Design
Verification & Assessment
Engineering Calculations
Compliance Documentation
Structural Engineering
Certification Support
Mechanical $ Structural Engineer specialising in Pressure equipment and structural sign-off.
By Chartered Professional Mechanical and Structural engineer specialising in many areas such as Material Handling, Calculations, Machines Design, Computer-Aid Design, hazardous equipment’s cranes, pressure vessels etc. and sign-off.
Contact Pat to discuss your project and request a quotation.
Professional Engineering Design & Certification Support
Practical mechanical and structural engineering support for small and large projects, including design assistance, engineering calculations, verification, compliance documentation, and certification support.
Contact Pat to discuss your project and request a quotation.
Professional Engineering Design & Certification Support
Practical mechanical and structural engineering support for small and large projects, including design assistance, engineering calculations, verification, compliance documentation, and certification support.
Contact Pat to discuss your project and request a quotation.
Professional Engineering Design & Certification Support
Practical mechanical and structural engineering support for small and large projects, including design assistance, engineering calculations, verification, compliance documentation, and certification support.
About Pat
About Pat
Chartered Professional Mechanical & Structural Engineer with 25+ years’ experience across design, certification, and project management. Pat has held senior leadership roles and delivered major projects for power generation, mining, steel, and infrastructure industries. His expertise spans pressure equipment, structural design, compliance documentation, and quality assurance — providing clients with fast, reliable, and fully compliant certifications.
01.
Engineering Design
Practical mechanical and structural engineering design for small and large projects, tailored to meet your specific requirements and project objectives.
01.
Engineering Design
Practical mechanical and structural engineering design for small and large projects, tailored to meet your specific requirements and project objectives.
02.
Engineering Calculations
Detailed engineering calculations and technical analysis to assess structural integrity, mechanical performance and compliance with relevant standards.
03.
Verification & Assessment
Independent engineering reviews, design verification and technical assessments, including FEA and stress analysis, to evaluate safety and compliance.
03.
Verification & Assessment
Independent engineering reviews, design verification and technical assessments, including FEA and stress analysis, to evaluate safety and compliance.
02.
Documentation
Clear, audit-ready compliance reports and QA/HSE documentation aligned to ISO 9001 / PMBOK, written for regulators and site teams.
04.
Compliance Documentation
Clear, professional engineering reports, technical documentation and compliance records prepared to support project requirements and relevant standards.
05.
Certification Support
Professional certification assistance for pressure equipment and structural works, helping ensure projects meet applicable AS/NZS standards and regulatory requirements.
Payment details will be provided upon acceptance of a quotation or issue of an invoice.
Send through your drawings, project details, or even a quick outline of the job.
Patrice can review your project requirements and provide practical engineering advice, design assistance, calculations, technical assessments and documentation to help move your project forward.
Payment details will be provided upon acceptance of a quotation or issue of an invoice.
Send through your drawings, project details, or even a quick outline of the job.
Patrice can review your project requirements and provide practical engineering advice, design assistance, calculations, technical assessments and documentation to help move your project forward.
Payment details will be provided upon acceptance of a quotation or issue of an invoice.
Send through your drawings, project details, or even a quick outline of the job.
Patrice can review your project requirements and provide practical engineering advice, design assistance, calculations, technical assessments and documentation to help move your project forward.
Payment details will be provided upon acceptance of a quotation or issue of an invoice.
Send through your drawings, project details, or even a quick outline of the job.
Patrice can review your project requirements and provide practical engineering advice, design assistance, calculations, technical assessments and documentation to help move your project forward.
Independent engineer with decades of experience. Fast, clear certifications to keep your project moving
Independent engineer with decades of experience. Fast, clear certifications to keep your project moving
Independent engineer with decades of experience. Fast, clear certifications to keep your project moving
Qualifications
PhD in Structural Engineering (2020)
Master’s in Engineering Management – SCU (2017)
BEng Mechanical – VUT (1988)
Chartered Professional Engineer (CPEng, MIEAust, RPEQ 27808)
FIEAust, APEC Engineer, IntPE (Aus)
Qualifications
PhD in Structural Engineering (2020)
Master’s in Engineering Management – SCU (2017)
BEng Mechanical – VUT (1988)
Chartered Professional Engineer (CPEng, MIEAust, RPEQ 27808)
FIEAust, APEC Engineer, IntPE (Aus)
Experience
25+ years in Mechanical & Structural Engineering
Senior leadership roles in major engineering firms
BlueScope Steel: Reliability projects & plant extensions
Seven Group: Directed design team for global equipment releases
Eneraque: Delivered $2M–$100M turnkey projects + patents
Experience
25+ years in Mechanical & Structural Engineering
Senior leadership roles in major engineering firms
BlueScope Steel: Reliability projects & plant extensions
Seven Group: Directed design team for global equipment releases
Eneraque: Delivered $2M–$100M turnkey projects + patents
Expertise
Pressure Equipment Certification & Compliance
Structural Sign-off & Mechanical Verification
CAD, SolidWorks & Finite Element Analysis (FEA)
ISO 9001, QA, HSE & Risk Management
Project Management (PMBOK) & Documentation
Expertise
Pressure Equipment Certification & Compliance
Structural Sign-off & Mechanical Verification
CAD, SolidWorks & Finite Element Analysis (FEA)
ISO 9001, QA, HSE & Risk Management
Project Management (PMBOK) & Documentation