Great engineering brings complex visions to life

Nusantara, Indonesia

Indonesia’s New Mosque, Designed for a United Nation

Nusantara National Mosque

Jakarta, Indonesia

A Data Centre Engineered for Indonesia’s Fastest Digital Growth

Evolution DC – Haryono Jakarta

Jakarta, Indonesia

A place for every student to gather and belong

British School Jakarta

Who we are

Great engineering starts with great people. We partner closely with clients and collaborators to create solutions that elevate every idea, every project, every outcome.

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Services

Our expertise

Structural Engineering Structural Engineering Ambitious ideas transformed into refined, enduring structures through collaborative, high‑calibre engineering. Learn more Civil Engineering Civil Engineering Close collaboration and grounded expertise create civil outcomes that work for communities and clients Learn more Façade Engineering Façade Engineering Architectural ambitions become buildable façades through thoughtful partnership and technical insight. Learn more Traffic Engineering Traffic Engineering Smarter movement is created through close collaboration, clear planning and solutions shaped around real journeys. Learn more Construction Engineering Construction Engineering Complex construction challenges are simplified through practical insight, sharp sequencing and our experts Learn more

Our scale gives us reach; our people give us impact. Together, we deliver coordinated engineering solutions from concept to completion.

Projects

Our work

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A technical and holistic approach

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Our engineers welcome the challenge of embedding visionary and sustainable design in efficient, elegant and functional project solutions.

We combine creativity, experience and innovation with modern engineering techniques and materials to develop solutions that achieve aesthetics, practicality, and sustainability goals. TTW is committed to developing and investing in the most advanced and innovative technologies available.

Together, our teams deliver improved project efficiencies, cost reduction and risk-mitigation, plus wider design freedom to bring our client’s vision to life.

Discover unlimited possibilities

We are always looking for talented and passionate people to join our team.

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News

Latest from TTW Engineering

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Robert Mackellar Retirement Announcement People Robert Mackellar Retirement Announcement It is with mixed emotions that we announce the retirement of one of our industry’s best engineers, Robert Mackellar, effective from 1 July. Those… Our Year in Review Events Our Year in Review 2025 marks a first for TTW with the release of our Annual Report The report brings together the projects, partnerships, and progress that… Events Eid 2026 Full story coming soon. Events Arkadia Cup 2025 Full story coming soon.
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Spark Interact Wireframe

Wireframe Sign-Off

You are approving this page: Home. Review the terms, draw your signature, and provide your details.

1. Scope of Approval

By signing off, you confirm the page structure, content hierarchy, section order, and information architecture are approved as presented.

2. What This Covers

  1. Number and order of pages
  2. Content sections and their hierarchy
  3. Type of content in each section
  4. Navigation structure

3. What Happens Next

The project moves into design. The approved structure becomes the foundation.

4. Changes After Approval

Structural changes after sign-off are a scope variation requiring a separate quotation.

5. Design Phase Feedback

Two rounds of design revisions are included as standard.

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Welcome to Wireframe Review

This is a structural blueprint of your website showing the layout, content hierarchy, and page flow before any visual design begins.

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Click Add Comment, then click any section or specific element (heading, image, text) to leave targeted feedback.

Sign off when you're ready

Once you've reviewed everything, click Sign Off to formally approve the wireframe with your name and signature.

Spark Interact

1. Confidentiality

This wireframe document is confidential and provided solely for your review as part of a design engagement with Spark Interact Pty Ltd. It must not be shared, distributed, copied, or reproduced without prior written consent from Spark Interact.

2. Intellectual Property

All content, structure, layout concepts, and design elements within this wireframe remain the intellectual property of Spark Interact Pty Ltd until full payment is received. Approved wireframes become the property of the client upon project completion and final payment.

3. Scope of Review

This wireframe represents the structural blueprint of your website — page layout, content hierarchy, section order, and information architecture. It does not represent the final visual design, colours, typography, or brand treatment.

4. Feedback & Revisions

You are encouraged to leave comments on any section using the feedback tools provided. Structural changes after formal sign-off constitute a scope variation and may incur additional fees and timeline adjustments.

5. Sign-Off

By completing the Sign Off process, you confirm you are authorised to approve the wireframe on behalf of your organisation, and that the page structure, content hierarchy, and navigation are approved as presented.

6. Limitation of Use

This portal and its contents are provided for client review purposes only. Any attempt to extract, reverse-engineer, or replicate the wireframe system, tools, or methodology is strictly prohibited.

7. Governing Law

These terms are governed by the laws of New South Wales, Australia. Any disputes will be subject to the exclusive jurisdiction of the courts of New South Wales.

Information We Collect

When you use the feedback and comment features in this wireframe portal, we may collect your name and any information you voluntarily provide in comments. We do not collect payment information, passwords, or sensitive personal data through this portal.

How We Use Your Information

Information collected through this portal is used solely to facilitate communication between you and the Spark Interact project team. Comments and feedback are used to inform revisions to your wireframe and design.

Data Storage & Security

Comment data is stored securely on our servers. We implement reasonable security measures including SSL encryption. Access to your project portal is restricted to authorised Spark Interact team members and your designated contacts.

Third-Party Sharing

We do not sell, trade, or transfer your personally identifiable information to external parties, except trusted service providers who assist in operating our systems and are bound by confidentiality agreements.

Data Retention

Project data including comments and sign-off records is retained for a minimum of 12 months after project completion, after which it may be archived or deleted at our discretion.

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This portal uses a browser cookie solely to remember that you have completed the onboarding tutorial. No tracking or advertising cookies are used.

Contact

For privacy enquiries, contact Spark Interact at info@sparkinteract.com.au or Level 5, Suite 501/84 Pitt St, Sydney NSW 2000. Phone: 1300 799 858.

© 2026 Spark Interact Pty Ltd — Sydney NSW