Claim you profile

In order to claim your profile, we need to send an email to the email address you used when you created your SkillPages account. This will contain a unique link to claim your profile. We have sent the email to:


If you don't have access to this email account then please contact the team.

Geraldo - Operation & Maintenance Engineer - Washington, District Of Columbia, USA

Mario Donato Geraldo

Washington, District Of Columbia, USA


Operation & Maintenance Engineer

  • Full time
  • Part time
  • One time
  • Contract
  • Temp


Project management, Senior water & waste water Engineer

Work History

Sr. Mechanical maintenance Engineer ( O & M)

Keppel Seghers Engineering Pte Ltd

From January 2013

(Doha North Waste Water Project)

Duties and Responsibilities:
• Lead a team of Engineers, Technicians, Welders, Fitters and Skilled workers to provide repair and maintenance of the plant mechanical equipment with O&M procedure.
• Implement the maintenance and calibration schedule for the whole plant and perform scheduled maintenance and calibration promptly. File all maintenance and calibration records properly and prepare report per O&M procedure. Assist in developing standard operating procedures for maintenance and calibration of plant equipment and instrumentation.
• Work with operations team to attend to equipment failure promptly for investigation and corrective action to ensure speedily restoration of normal plant operation.
• Assist and track all defects, expedite it's corrective action and closure including clearance of punch list. Supervise all contractors onsite for defect rectification to comply with safety and environment requirement.
• Prepare spare parts and consumable list and procure them promptly to support plant operations.
• Liase with engineering personnel on plant maintenance problems and incorporate maintenance considerations in the selection of new equipments.

Sr. Mechanical Engineer (O&M Water & Waste Treatment Plant)

Saudi Oger - Jubail Industrial City, Saudi Arabia

May 2011 - January 2013

Year: May 2011----Jan.2013

Position: Sr. Mechanical Engineer (O&M Water & Waste Treatment Plant)

Duties and Responsibilities:
• Prepare an effective operational plan for the plant
• Oversee the implementation of the plan and take corrective action when deviation occurs, corrective actions could be technical and give instruction to operation personnel.
• Ensure that required materials would be available for the implementation of monthly operational plan.
• Itemized repeated logistical problems and the weekly operational development meeting for follow-up corrective action.
• Prepare Daily, Weekly and Monthly report.
• Follow-up short term corrective measures taken by subordinate are satisfactory done.
• Ensure that all subordinates have all necessary Safety Equipments and gear for their respective field of works.
• Maintain Logbooks, even minutes information concerning Man/Machine and provide procedures.
• Raise notification for the plant maintenance using SAP.
• Raise incident report when needed and ensure that the plant in good housekeeping.

Plant Engineer ( Water & Waste water treatment plant)

Kellog Brown & Root Services Inc

March 2007 - July 2010

Jalalabad, Afghanistan

Year: March 2007--- July 2010
Position: Plant Engineer ( Water & Waste water treatment plant)

(Operation & Maintenance)

Water Treatment Engineer (Reverse Osmosis Water Purification Unit)

Kellog Brown & Root Inc

From January 2004

Prime Projects - Camp Anaconda, Balad, Iraq

Year: January 2004 - 2007
Position: Water Treatment Engineer (Reverse Osmosis Water Purification Unit)

Duties and Responsibilities:
• Maintain and operate 180,000 GPD reverse osmosis unit and maintain different pumps & motors such as: submersible pumps, booster pumps, dosing pumps, centrifugal pumps.
• Maintain and adjust the parameters of product water for post treatment such as; PH, free chlorine, TDS, NTU.
• Monitor and check different kinds of pressure gauges, pressure indicators, pressure transmitters and flow meters in the unit.
• Responsible of mixing chemicals feed into the system such as; sodium hypochlorite, citric acid and sequestrant.
• Perform corrective maintenance in the unit such as; changing of membranes element, changing submersible pumps, changing cartridge filters, changing of media filters and installing of suction and distribution hoses.

Process Engineer (Sewage Treatment Plant) (O&M)

OASIS Trading and Contracting Company -Al-Khobar

February 1998 - September 2003

Saudi, Arabia

Year: Feb 1998 - Sept. 2003
Position: Process Engineer (Sewage Treatment Plant) (O&M)
Duties and Responsibilities
• Responsible for the operation of Plant leading a team of shift engineers, control room operators, plant operators, H.E operators and laborers.
• Prepare operational plan for the plant, Raise notification for plant maintenance, prepare monthly report for plant operation.
• Responsible for the process monitoring of equipment operation of Biological treatment plant, Tertiary Filtration, Effluent Pump house, Chlorine Plant, Sludge dewatering system, Lagoon Pump station.
• Monitor process & equipments of operation of each crew assigned area & take precautionary measures to all problems arises in the treatment process.
• Monitor dissolved oxygen level of Aeration tanks, checking SVI of mixed liquor from Aeration tank outlet.
• Making process changes as per the result of the Analysis from the laboratory.
• Ensure that all areas must be clean & tidy for each area of responsibilities.
• Prepare Monthly reports for plant maintenance.
• Review reports and submit daily report to manager.
• Maintain Safety procedures must be followed to all personnel.

Installation and Commissioning Engineer (Reverse Osmosis Unit)

National Establishment and Economic Dev't. - Jeddah, Saudi Arabia

March 1992 - October 1997

Year: Mar 1992 - Oct 1997
Position: Installation and Commissioning Engineer (Reverse Osmosis Unit)

Duties and Responsibilities:
• Install and commission Reverse Osmosis unit and all its auxiliaries to the standard specifications as ordered.
• Operate and maintain the unit to obtain the rated capacity as specified in the manual before it is being turn over to the owner.
• Perform mechanical and plumbing installation for additional design if needed.
• Perform corrective maintenance of unit as costumer requires.
• Train and advice operators to operate the unit effectively.

Process Control Engineer

Philippine Phosphate Fertilizer Corp

August 1987 - December 1991

Duties and Responsibilities:
• In charge in preparation of mixing chemicals such as sulfuric acid, phosphoric acid, ammonia to obtain a mole ration for a desired grade of fertilizer.
• Monitoring and supervision of granular molecules of fertilizer being feed to system.
• In charge of control room operators.

Field Process Engineer

Philippine Phosphate Fertilizer Corp

August 1984 - December 1986

Duties and Responsibilities:
• In charge in solids handling fertilizer production from raw materials to finish product and storage.
• Monitoring the process flow of fertilizer from each equipment, the quality and volume being produced.
• Monitor and observe the dust and waste product around the plant if needed initiate clean-up.

Qualifications & Certifications

St. Peter's college, Philippines

Mechanical Engineering

University of San Jose Recoletos

Is this your profile?

If this is your profile, then you can claim it now and log into your account.

We will need to verify your account and email address before you can log in. To claim your profile now, please use the 'Claim Profile' button below.

Skillpages has been acquired by! is pioneering the way people find local services. Skillpages is the world’s premier directory of service providers.

Find out more

Are you sure that you want to leave?