Job Details

Requisition Number 16-0106
City Houston
State TX

Position Title: Senior Principal Mechanical Engineer


Location: Houston, TX


Gulf Interstate Engineering serves the worldwide pipeline industry providing project management, engineering and design, GIS, procurement and construction management services for hydrocarbon transportation systems - from the wellhead to the export terminal and the burner tip.


Position Description

The Senior Principal Mechanical Engineer handles medium, large and complex projects. He/she has wide latitude of technical authority with full work responsibilities, as well as limited administrative responsibilities, over a group of Mechanical Engineers and Designers. He/she may assign and review work of lower level personnel. He/she may also function as the Lead Mechanical Engineer, responsible for all discipline technical and scheduling matters pertaining to the assigned project. Work is periodically reviewed by the Chief Mechanical Engineer for accomplishment of objectives.


Essential Functions

  • Assists the Chief Mechanical Engineer in proposals.
  • Assists the Chief Mechanical Engineer in providing training to personnel.
  • Prepares or reviews discipline project specifications.
  • Prepares or reviews requisitions for inquiry in support of purchasing equipment, materials, and subcontracts.
  • Prepares or approves technical bid evaluations for equipment, materials, bulk material and subcontracts in cooperation with Procurement Department.
  • Observes factory acceptance testing of equipment in cooperation with the Lead Engineer.
  • Performs engineering calculations as required by discipline.
  • Prepares or reviews equipment, valve, piping line, and piping tie-in lists.
  • Prepares or reviews piping and instrument diagrams, piping layouts and plot plans.
  • Directs/observes factory acceptance testing of equipment.
  • Coordinates with and provides liaison with client personnel relative to mechanical and piping activities.
  • Reviews and approves vendor documents.
  • Prepares or reviews engineering and design status reports, logs, work plans and project variances.
  • Reviews the discipline scope of work to be executed to ensure it matches project specification and/or the proposal documents as appropriate.
  • Accepts both short and extended term assignments to the site, client’s office, etc. as may be requested by the Chief Mechanical Engineer.



  • Typically 15+ years experience focusing on oil and gas pipeline facilities. 
  • In depth knowledge of petroleum liquid and gas industry codes and standards published by US Department of Transportation, AGA, ANSI, API, ASME, MSS, NFPA, etc. and have the ability to apply the standards to oil and gas pipeline facility systems designs.
  • Knowledge of computer systems in an engineering environment.
  • Excellent written and verbal communication skills.



  • Bachelor of Science degree in Mechanical Engineering
  • Professional Engineering License preferred



  • Results oriented
  • Customer focused
  • Impact and influence
  • Business and people acumen


Mechanical Engineering is a highly specialized group whose function is to provide design-engineering service covering:
·Mechanical Equipment and Piping System Design – Develop the optimum system based upon desired performance, space constraints, reliability, maintainability, flexibility and cost.
·Studies/Calculations – Perform calculations and analysis for the following studies: fluid properties, pipe design pressure, liquid and gas line sizing, pipe volume, pressurizing time, purging velocity, blowdown time, orifice sizing, regulator and control valve sizing, relief valve sizing, pump NPSHA, compressed air requirements, building heating and ventilation, pressure testing, and fuel gas heating.
·Process Hazard Analysis –Participate in analysis of potential process safety hazards.
·Site Layouts and Plot Plans – Determine location, size and arrangement of major mechanical equipment and piping and assist with building layouts and sizing.
·Standards Specifications – Responsible for technical content of standards and preparation of specification including:
  • Pressure Vessels, Drums and Tanks
  • Silencers
  • Pumps and Compressors
  • Flares
  • Engines and Gas Turbines
  • Regulators
  • Filters, Scrubbers and Strainers
  • Control Valves
  • Pipe, Fittings, Valves and Valve Actuators
  • Gas Dehydration Equipment
  • Heat Exchangers and Heaters
  • Pressure Safety Valves
  • 3-Phase Separators
  • Meters and Provers
·Construction Drawings – Approved for construction drawings and schedules:
  • Piping and instrument diagrams
  • Equipment lists
  • Equipment Plot Plans
  • Valve lists
  • Piping Plot Plans
  • Piping line lists
  • Piping plans and details
  • Piping tie-in lists

 All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

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