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PLC Engineer/Sr Engineer, QAPCO (Mesaieed) at Worley Parsons

PLC Engineer/Sr Engineer, QAPCO (Mesaieed)

Worley Parsons Qatar/Qatar, Doha Full-Time
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At the end of April 2019, WorleyParsons combined with Jacobs’ Energy, Chemicals and Resources (ECR) division, to create Worley. 
Together, we are a leading global provider of professional project and asset services in the energy, chemicals and resources sectors. 
We have almost 60,000 amazing people in around 60 countries across the world covering the full lifecycle, from creating new assets to sustaining and enhancing operating assets for our customers.
Our exciting combination will create new opportunities for you to join us. The transition will take time, so in the short-term you may see references to our heritage companies in your application process.
Visit [ Link removed ] to explore our success, expertise and global reach.

Study and develop conceptual designs, prepare detailed engineering solutions, plan & monitor and coordinate all assigned modifications (projects) with the project team for a wide range of tasks related to discipline scope. Act as a key focal point for in-house /subcontracted engineering. Review of engineering studies conducted in line with defined requirements, industry best practices and contractual agreements.

Project Management

  • Coordinate discipline review and approval of design and interfaces with Contractor on Company requirements and specifications.
  • Review and approve all related technical documents and coordinate with the supervisor.
  • Carry out technical reviews of all areas of work covered under Instrumentation & Control systems engineering projects while evaluating requests and recommending appropriate solutions and proposing changes as necessary within the defined project scope and protocols to facilitate the achievement of defined objectives.
  • Coordinate and provide engineering support for construction activities, including the assurance that construction engineering details are provided. 
  • Review and approve modifications (projects) as-built documents.

Design and Engineering:

  • Carry out the design and technical reviews for all areas of work such as field instruments, Control valves, DCS/PLC control systems, Fire & Gas systems, analyzers, Vibration monitoring systems, etc. 
  • Execute verification, studies and detail design following best engineering practices and optimization in terms of costs, construction simplicity, operability and maintainability, codes and standards, HSSE, etc.
  • Prepares design specifications for Field Instruments, Control & On-off valves, DCS/PLC systems, F&G systems, Liquid & Gas analyzers, Gas chromatographs, Condition monitoring systems, etc. 
  • Develops calculations for SIS loops, orifice sizing, control valve sizing, thermowell wake frequency, etc.
  • Develops DCS functional logic, PLC logic, hook up drawings, loop drawings, wiring diagrams, interface drawings, cable block diagrams, cable schedule, panel layout drawings, cable routing drawings, cable tray/duct layouts, instrument layouts, etc.
  • Prepares material specifications.
  • Prepares MTOs and BOQs.
  • Prepares Scope of Work and technical specification for Instrumentation & Control systems. Package items such as compressors, blowers, pumps, tanks, etc. and Construction subcontracts.
  • Prepares technical documentation for Instrumentation & Control system material requisition.
  • Carry out technical evaluations.

Health, Safety, Security, Environment and Quality:

  • Ensure compliance with all relevant health, safety, security, environmental and quality management procedures.
  • To work closely with HSSE on related tasks.
  • Ensure updating documentation related to modifications (projects). 
  • Participate in modifications (projects) risk assessment studies such as HAZOP/LOPA, etc.


  • Provide regular progress reports related to assigned modifications (projects).
  • Preparation of specific reports upon request.

Job Specific Knowledge

  • Good exposure to brownfield modification projects.
  • Must have experience in engineering site surveys to acquire the right amount of information need for detailed engineering.
  • Knowledge of field instrument installation and practices.
  • Knowledge in Industrial Instrumentation & Control engineering
  • Knowledge in Industrial Codes & Standards such as NFPA, ISA, IEC, etc.
  • Conceptual and analytical skills
  • Skill to resolve technical problems and provide quick and cost-effective engineering solutions based on good engineering practices.
  • Knowledge in Safety Instrumented Systems (SIS) and SIL calculations.
  • Knowledge in LOPA analysis and HAZOP
  • Knowledge in the operation principles of field instruments (pressure, level, flow, temperature, etc., control valves & On-off valves.
  • Knowledge in Fire & Gas systems, Analysers, Vibration monitoring systems, Fibre optic communications and its networking etc.
  • Knowledge in DCS/PLC control systems, architecture & its networking and industrial communication protocols.
  • Knowledge in DCS/PLC control functions & logic preparation.
  • Knowledge of the operations/products of petrochemical plants
  • In depth knowledge of PLC programming (Siemens) as per IEC61131.
  • In depth knowledge of Control Panel assembly, erection, testing and commissioning.
  • Good experience in PLC upgrade projects.
  • Sufficient knowledge of various types of PLC hardware and accessories.

Industry Specific Experience

  • Minimum 8 years Instrumentation & Control engineering experience in oil and gas for offshore and onshore projects
  • Minimum of 5 years of engineering experience in the same or similar industry, including experience in multi-disciplinary projects and teams. 
  • Good knowledge of discipline design/engineering with sufficient experience in different discipline areas. 
  • Additionally, the candidate shall have valid practical experience on both Logic Engineering & maintenance troubleshooting some of the following control systems:-

•    Siemens S7
•    Triconex
•    Allen Bradley

Education – Qualifications, Accreditation, Training:    
•    Full-Time Bachelor’s Degree in Instrumentation/Electronics Engineering from an accredited university
•    MME (Ministry of Municipality and Environment) engineering accreditation is a mandatory requirement. Candidates not holding this accreditation must be willing to achieve this within the probationary period.
•    Chartered Professional Engineer (CPEng) status or undertaking the same will be an advantage


Recommended skills

Programmable Logic Controllers
Control Valves
Control Systems
Installations (Manual/Mechanical)
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