Civil engineer · Dhaka, Bangladesh

Muhammad Sarowar Hossain

Founder & CEO, Prime Base Engineering

I strengthen what already stands, and build what comes next. I am a civil engineer specialising in structural and bridge retrofitting, steel and RCC construction across Bangladesh, from estimate to handover.

Portrait of Muhammad Sarowar Hossain, civil engineer and Founder & CEO of Prime Base Engineering, in a navy blazer
14 retrofitting projects
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Key numbers

ASheet 01 / About

An engineer who prices it,plans it and builds it.

Muhammad Sarowar Hossain, civil engineer, photographed in an office setting
Fig. 01Muhammad Sarowar Hossain

I am Muhammad Sarowar Hossain, a civil engineer in Bangladesh. I am the Founder & CEO of Prime Base Engineering and the Project Manager at Infinitas Engineering in Dhaka.

My specialism is the execution of structural retrofitting: strengthening existing factories, public buildings and bridges so they are safe, compliant and fit for decades more of service. Engineers who have executed retrofitting from start to finish are rare. Fewer still combine it with new construction, steel structures and bridge work. That combination is my core value.

I joined Infinitas Engineering as a Site Engineer in December 2017 and have been promoted four times, to Project Manager. Along the way I completed a BSc in Civil Engineering and a postgraduate diploma in supply chain management, both while working full time on live sites.

When I price a job, I know how it will actually be built. When I build it, I know what it cost and what the client was promised. When I negotiate, I can defend every rate line by line.

Infinitas is a lean company, so over nine years I have personally done the work of estimator, planner, purchaser, negotiator and site manager, from the first client meeting to the final handover. Most of my projects are executed under the client's own QC engineers and an independent third-party QC consultant, to the standards expected by international brands and compliance programmes such as Accord and Alliance.

What I value

Clients and organisations I have worked for

  • Epyllion Group
  • Palmal Group of Industries
  • Mohammadi Group
  • Far East
  • Renata Pharmaceuticals
  • ACI Salt Limited
  • Ispahani Group
  • Education Engineering Department
  • Roads and Highways Department
  • Partners in Population and Development
  • Hazrat Shahjalal International Airport, Terminal 3

BSheet 02 / Career journey

Five levelsin nine years.

I started on site in 2017. Each role below adds a storey to the structure, from the foundation to the level I work at today.

  1. Mar – Nov 2017

    Site Engineer (Intern)

    Akota Builders & Design Ltd

    My first job on site: quality control on an eight-storey residential building under construction.

  2. Dec 2017 – Dec 2019

    Site Engineer

    Infinitas Engineering, Dhaka

    Two intense years across 11 projects in retrofitting and new construction. I started on the structural retrofitting of the Ventura Leatherware factory in Uttara EPZ, Nilphamari.

    • Supervised daily works, labour teams and subcontractors against drawings and specifications
    • Prepared quantities, BOQs, daily progress reports and material records
    • Maintained a zero lost-time-incident record

    Ventura LeatherwarePPDMG Niche FlairEpyllion KnitexDekko KnitwearsKhanpur Residence

  3. Jan 2020 – Jan 2022

    Project Engineer

    Infinitas Engineering, Dhaka

    I led the Mohsin Club, a basement plus four-storey commercial building financed by Epyllion Foundation, together with its playground.

    • Ran initial site visits, gathered client requirements and prepared proposals and estimates
    • Built and tracked schedules in MS Project and Primavera P6
    • Managed change orders, RFIs and project correspondence
    • Maintained an accident-free safety record on site

    Mohsin ClubKhanpur playground

  4. Feb 2022 – Dec 2023

    Senior Project Engineer

    Infinitas Engineering, Dhaka

    I delivered structural retrofitting at Bhaiya Apparels and Renata Pharmaceuticals, and a government retrofitting project for the Education Engineering Department that was won through public tender.

    • Prepared project execution plans covering scope, budget, timeline and quality control
    • Reviewed shop drawings with clients, architects and consultants to protect design intent
    • Carried out risk assessments and helped set up project management office (PMO) practices
    • Completed the Mohsin Club in September 2022

    Bhaiya ApparelsRenata PharmaceuticalsEducation Engineering Department

  5. 2024

    Assistant Project Manager

    Infinitas Engineering, Dhaka

    I managed several projects at once, on site and from the office, and delivered steel structure retrofitting at Cortz Apparels Limited Unit 02 for Palmal Group of Industries.

    • Led pricing, budget preparation and rate negotiation with clients
    • Supported depot, school and mill projects from the head office

    Cortz Apparels Unit 02Ispahani depotsBhaiya Group depot

  6. 2025 – present

    Project Manager

    Infinitas Engineering, Dhaka

    I hold full responsibility for projects from enquiry and costing through execution, billing and handover.

    • Leading the structural retrofitting of the ACI Salt Limited production building in Rupganj, Narayanganj
    • Led the retrofitting of the Royhati Jora Bridge, Sirajganj, under SASEC 07 of the Roads and Highways Department
    • Client relationships, contract negotiation and securing purchase orders
    • Planning and scheduling in Primavera P6, mobilisation and cost control

    ACI Salt LimitedRoyhati Jora BridgeIspahani Feni depot

  7. Alongside my project work

    Founder & CEO

    Prime Base Engineering

    I founded Prime Base Engineering, a structural engineering and construction firm that offers retrofitting, assessments, as-built documentation and factory compliance services. My goal is to grow it into a trusted name for structural safety in Bangladesh.

CSheet 03 / Specialism

Structural retrofitting,executed from A to Z.

Structural retrofitting strengthens an existing building so it can safely carry its loads and meet current codes. It is most of what I have done for nine years, across 14 of the 26 projects in my portfolio.

Detail · Column jacketing, plan view

Existing column New reinforcement added New concrete jacket cast

Column jacketing enlarges and reinforces an existing column with new concrete and steel. Diagram is illustrative, not to scale.

How a retrofitting project runs, and where I come in

  1. 1

    Assessment

    The client appoints a reputed structural consultant to carry out a Detailed Engineering Assessment (DEA).

  2. 2

    Design

    If the DEA finds problems, the consultant runs a structural analysis and issues a retrofit design.

  3. 3

    Vetting

    The client may have the design checked by an independent third party.

  4. 4

    Tender My role

    The client invites several contractors to quote. I prepare the BOQ, rate analysis and budget, and submit the tender.

  5. 5

    Award My role

    Work usually goes to the most competitive bidder who can also prove quality. I negotiate rates and present our capability and track record.

  6. 6

    Execution My role

    I lead the work exactly to the consultant's design, under the client's own QC engineers and a third-party QC consultant.

  7. 7

    Close-out My role

    I complete the inspections, records and handover that satisfy the client and every reviewer.

Retrofitting works I have executed

  • Column jacketing. Enlarging and reinforcing existing columns with new concrete and steel.
  • Beam jacketing. Strengthening beams to carry higher loads.
  • Footing and foundation strengthening. Enlarging or reinforcing foundations.
  • Steel structure retrofitting. Strengthening steel frames and connections, as at Cortz Apparels Limited Unit 02.
  • Bridge retrofitting. Strengthening highway bridge infrastructure, as on the Royhati Jora Bridge.

What makes the execution demanding

  • Live buildings. Factories and plants usually keep running, so work is sequenced around production and workers.
  • Temporary works. Members are loaded while they are being strengthened, so propping and sequencing must be right.
  • Tight tolerances. New concrete and steel must bond correctly with the old structure.
  • Multiple reviewers. Client QC, third-party QC and sometimes the design consultant inspect each stage.
  • Documentation. Every stage needs inspection requests, test results and approvals for compliance audits.

DSheet 04 / Project portfolio

26 projects, fromNilphamari to Chattogram.

All 26 are named projects at Infinitas Engineering: 14 that I led or executed on site and 12 that I supported from the office. Of these, 14 are structural retrofitting, including a highway bridge, and 12 are new construction.

Featured · Bridge retrofitting

Royhati Jora Bridge, Sirajganj

SASEC 07 · Roads and Highways Department (RHD), Bangladesh · Government / highways

I led a full highway bridge retrofit under SASEC 07, part of the South Asia Subregional Economic Cooperation road programme. Bridge retrofitting is one of the most specialised areas of the field, and it extended my retrofitting experience from buildings to highway infrastructure.

The difficulty. The work needed careful sequencing, temporary support and load transfer while the structure was partly dismantled, together with strict government specifications, supervision and documentation.

Schematic cross-section for illustration. Not a drawing of the actual bridge.

Project locations · 12 districts

Sites plotted by approximate latitude and longitude. Tap a point or a district below to filter.

Type of work

My involvement

District

Showing 26 of 26 projects

  1. My role
    Project Manager. I am leading this project.
    What I am doing
    Structural retrofitting of a food-grade production building: RC column, beam and slab strengthening, retrofitting of the main staircase and AAC block works.
    The difficulty
    The plant keeps operating, so all work is scheduled around production, under the oversight of a QC consultant.
  2. Client
    Roads and Highways Department (RHD), Bangladesh.
    My role
    Project Manager. I led the retrofit and was directly involved in the work.
    What I did
    Deck slab demolition and reconstruction, bearing pad replacement, bearing seat works, and PC girder and cross girder works.
    The difficulty
    Careful sequencing, temporary support and load transfer while the structure was partly dismantled, to strict government specifications and supervision.
  3. Client
    Palmal Group of Industries.
    My role
    Assistant Project Manager, 2024.
    What I did
    Strengthened the steel structure of the factory to the retrofit design.
    The difficulty
    It is a working garment factory, with strict QC and safety controls for a compliance-driven client.
  4. Client
    Education Engineering Department, Government of Bangladesh.
    My role
    Senior Project Engineer.
    What I did
    Delivered a public-sector structural retrofitting project that was won through a government tender.
    The difficulty
    Full compliance with public procurement rules, government specifications, documentation and inspection processes.
  5. My role
    Senior Project Engineer.
    What I did
    Delivered the structural retrofitting of a pharmaceutical plant.
    The difficulty
    In a pharmaceutical environment, cleanliness, dust control and minimal disruption to production are critical.
  6. My role
    Senior Project Engineer.
    What I did
    Delivered the structural retrofitting of a garment factory inside the Cumilla Export Processing Zone.
  7. Project
    A basement plus four-storey commercial building, financed by Epyllion Foundation as a CSR project.
    My role
    I started it as Site Engineer, led it as Project Engineer and completed it as Senior Project Engineer.
    What I did
    New construction from start to finish.
    Period
    August 2019 to September 2022.
    Site photos of Mohsin Club (opens in a new tab)
  8. My role
    Project Engineer.
    What I did
    Built the playground that belongs to the Mohsin Club.
  9. Client
    Epyllion Group.
    My role
    Site Engineer.
    What I did
    Executed the structural retrofitting of the factory.
    Period
    November 2018 to February 2019.
    Site photos of Epyllion Knitex (opens in a new tab)
  10. Client
    Mohammadi Group.
    My role
    Site Engineer.
    What I did
    Executed the structural retrofitting of the factory.
    Period
    August 2018 to December 2018.
    Site photos of MG Niche Flair (opens in a new tab)
  11. My role
    Site Engineer.
    What I did
    Executed the structural retrofitting of the building of an international NGO.
    Period
    Early 2018.
    Site photos of the PPD building (opens in a new tab)
  12. My role
    Site Engineer. This is where my career at Infinitas Engineering started.
    What I did
    Structural retrofitting for a Chinese-owned leather goods manufacturer in an export processing zone.
    Period
    December 2017 to April 2018.
    Site photos of Ventura Leatherware (opens in a new tab)
  13. My role
    Back-office leadership as Project Manager. I oversee this ongoing project from the office.
    Scope
    Greenfield depot construction: buildings, steel structures and a boundary wall.
  14. My role
    Back-office support.
    Scope
    A two-storey prefabricated steel warehouse, a depot shed and a herringbone bond road.
    Period
    February 2019 to January 2020.
    Site photos of the Ispahani Bogura depot (opens in a new tab)
  15. My role
    Back-office support.
    Scope
    New construction of a logistics depot.
  16. My role
    Back-office support.
    Scope
    Civil works for the baggage handling system, delivered by Infinitas Engineering as a subcontractor to the main contractor on Bangladesh's flagship airport terminal.
  17. Client
    Epyllion Group.
    My role
    Back-office support.
    Scope
    Structural retrofitting of the factory.
    Period
    November 2018 to February 2019.
    Site photos of Epyllion Fabrics (opens in a new tab)
  18. My role
    Back-office support.
    Scope
    New construction of a triplex residence for a private client.
  19. My role
    Back-office support.
    Scope
    New construction for a spinning mill.
  20. My role
    Back-office support.
    Scope
    Structural retrofitting of the garment factory.
  21. My role
    Back-office support.
    Scope
    Structural retrofitting of the garment factory.

ESheet 05 / Expertise and skills

One accountable person,enquiry to handover.

I cover the whole project lifecycle, so a client can work with one accountable person from the first enquiry to the final handover.

  • First meetings with clients to understand their real requirement, budget and timeline
  • Joint site visits to inspect the building, access, constraints and live operations
  • Collecting architectural, structural and retrofit design drawings, DEA reports and site information
  • Clarifying scope gaps and technical questions with the client and the design consultant

  • Quantity take-off from drawings
  • Bill of Quantities (BOQ) preparation
  • Detailed rate analysis: materials, labour, equipment, overheads and margin
  • Market surveys of material and subcontract rates
  • Project budgets and tender submissions for private clients and government e-tender work

  • Presenting and defending budgets to clients
  • Rate negotiation and value engineering to meet the client's budget without compromising the design
  • Finalising scope, terms and the purchase order or work order
  • Variation orders, measurements and running bills

  • Project mobilisation: site setup, manpower, equipment and materials
  • Work programmes and sequencing, especially for buildings that stay in operation
  • Procurement planning, vendor sourcing and material delivery schedules
  • Cost tracking against the approved budget

  • Substructure: piling, excavation, basement, mat foundation and footings
  • Structure: RCC frame, shear walls, retaining walls and steel structures
  • Retrofitting: column and beam jacketing, foundation strengthening and steel structure strengthening
  • Architecture and finishing: brickwork, plaster, architectural features, tiles and painting
  • Services: coordination of plumbing and electro-mechanical works

  • Working to the client's QC engineers and independent third-party QC consultants
  • Inspection requests, test records and approval documentation
  • Site safety: propping, temporary works, PPE and safe work sequencing
  • Delivery to international brand compliance standards (Accord and Alliance)

  • Running several projects at once from the head office
  • Progress control, procurement, billing and reporting
  • Supporting site teams on technical, commercial and client issues

What sets me apart

Skills at a glance

Technical

Structural retrofitting executionColumn and beam jacketingFoundation and steel strengtheningRCC and steel constructionPiling and foundationsBasement and retaining structuresArchitectural and finishing worksMEP coordinationReading structural and architectural drawings

Commercial

Quantity take-offBOQRate analysisBudgetingPrivate and government tenderingRate negotiationVariations and billing

Management

Project planning and schedulingMobilisationMulti-project coordinationTeam leadershipClient and consultant liaison

Supply chain

ProcurementVendor sourcingMarket rate surveysMaterial planning

Quality and safety

Client and third-party QCInspection recordsCompliance documentationSite safety

Digital tools

Primavera P6MS ProjectAutoCADMS ExcelClaude CodeVS Code

Languages

Bangla (native)English (professional)

FSheet 06 / Ventures

Building companiesas well as structures.

Founder & CEO

Prime Base Engineering

Prime Base Engineering is the structural engineering and construction company I founded. It is a registered, trade-licensed firm based in Dhaka.

  • Structural retrofitting and strengthening. Extending the life, load capacity and seismic resilience of existing industrial and commercial buildings.
  • Detailed Engineering Assessment (DEA). Evaluating the structural integrity of factories and industrial facilities against safety standards.
  • As-built documentation. As-built architectural and structural drawings for existing buildings.
  • Regulatory compliance. Factory approval packages for the Department of Inspection for Factories and Establishments (DIFE).
  • Construction and project management. From estimate to handover.
primebasebd.com (opens in a new tab)

Founder · Construction technology

EstimatrixBD

EstimatrixBD is a cloud-based BOQ and rate analysis platform for civil engineers, estimators and contractors in Bangladesh, developed under Prime Base Engineering. I built it because I saw how much time engineers lose to repetitive manual calculations, outdated rate sheets and scattered tender documents.

  • Built-in access to Bangladesh Public Works Department (PWD) rate structures
  • Current market prices for cement, rebar, aggregates and finishing materials
  • Custom rate breakdowns, wastage factors and project templates, saved to the cloud
  • Client-ready BOQs, rate analysis sheets and tender documents for export
estimatrixbd.com (opens in a new tab)

Technologist

AI-assisted development and content

I use AI-assisted development tools to design, prototype and deploy web applications and company websites myself. I also produce Bangla explainer content, including short motion-graphics videos, that helps factory owners understand structural retrofitting.

GSheet 07 / Education and certifications

Studied whileworking full time.

Professional certificates, 2022 to 2023

Professional membership

Member, International Association of Engineers (IAENG).

What I plan to earn next

The Project Management Professional (PMP) certification from PMI and, in the longer term, an MBA from the Institute of Business Administration (IBA), University of Dhaka.

Muhammad Sarowar Hossain, Founder & CEO of Prime Base Engineering

HSheet 08 / Contact

Have a structure to strengthen,or one to build?

Talk to me about structural retrofitting, a structural assessment or a new construction project in Bangladesh.