F.A MAgnum Builders Co
About Us

Who we are

F.A. Magnum Builders Co. established in August 2017 and formerly known as RJBM Engineering Services is a joint construction team between two experienced, dedicated and passionate engineers named Engr. Aaron Jimi Mendoza and Francis Jodin Mamon. Both have respectively cultivated a decade of experience as Field Engineer and Technical Office Engineer locally and abroad.

Initially, RJBM Eng’g Services which was founded in 2014 by Engr. Mendoza has already accomplished several projects such as:

  • M Place Residences SMDC Interior Design
  • Grass Residence SMDC Interior Design
  • F1 Hotel Interior Design
  • LPL Office Renovation
  • 3 Stories Mangga Residence
  • 3 Stories Residential Parhomes
  • Knight Bridge Makati Residence Interior Design
  • El Jardine Del Presidente Mega World Interior Design
  • Amaryllis Residences DMCI Interior Design
  • Manhattan Parkway Residences Interior Design

Under Engr. Mendoza’s sole ownership and management, RJBM Eng’g Services has earned a faultless, clean reputation. His exemplary leadership, among equally dedicated and knowledgeable men, earned RJBM Eng’g Services a valuable name in the construction business.

His collaboration with Francis Mamon is set to deliver the same, excellent results. As Francis Mamon is also equipped with the fundamentals of office and field works, their partnership will certainly intensify the scope and progress of F.A.Magnum Builders Co. in the coming years.


- F.A Magnum Builders Co is dedicated in delivering customers the highest level of quality construction services while getting the best value for their money. We make sure that our services are priced fairly and competitively.
- We aim to ensure the sustenance and longevity of our company, thus we uphold highest work values – resulting in customer satisfaction, repeat and referral businesses.
- We are strict with timeliness, keen with details and we practice ethics in workplace.
- To ensure customer satisfaction, we attend to their needs and demands before, during and after construction.


F.A. Magnum Builders Co. is committed to being known locally and/or globally for integrity, quality and efficiency. Essentially, to achieve this, we ensure employee wellness, satisfaction and profitability.

Hours Of Work
Projects Completed
Engr. Aaron Jimi Mendoza

Engr. Aaron Jimi Mendoza

Francis Jodin Mamon
Vice President

Francis Jodin Mamon

Keno Abarquez
Project/Area Manager

Keno Abarquez