Business challenges facing consultants

Our solutions

Are you frustrated with failed audits due to non-compliant products? Meet your project deadline and increase customer satisfaction by collaborating with a top-ranked company that follows stringent quality assurance practices.
Do you experience frequent project delays? Choose a trusted advisor with a 20-year proven track record of delivering successful transit projects on time and within budget.
Are you facing a lack of system integration support and poor planning in your current projects? Select a network system integrator with strong experience delivering fully customized train network solutions for new and modernization projects.
Do you feel discouraged by poor and incomplete documentation from suppliers? Support your customer with our comprehensive documentation, from product specifications to training manuals.
Do you need a solution that complies with every requirement, including software specifications? Partner with a trusted, knowledgeable supplier capable of owning project scopes and designing and supporting software solutions.

Our promise

We strive to provide innovative, cost-effective solutions by delivering products and services founded upon three promises:


Why work with Quester Tangent

One-stop shop

We are an independent company with complete in-house electrical, mechanical, software, and system engineering capabilities, assisted by project management and manufacturing expertise. As your one-stop shop for train electronics, we excel at meeting our contract requirements on time and on budget.

Risk reduction

Quester Tangent proactively reduces technical and contractual risks for rolling stock manufacturers by committing to deliver all aspects of the project scope. We have strong internal processes in place to ensure consistent design, production, integration, and on-time delivery of allocated scope.

20-year service guarantee

We stand behind our products for the train’s service lifecycle. On a pro rata basis, we will cover our product support costs to provide our customers 20 years of service continuity for train electronics delivered into new build, retrofit, and overhaul projects.

Technology partner

Quester Tangent is a trusted partner of the rail transit industry and a leader in integrating innovative technology into train systems. We work with consultants and transit authorities by supporting them early on to clearly define their needs and advise them on their technology options before project tenders are released.

Obsolescence management

Quester Tangent maximizes the lifespan of its products and reduces the total cost of ownership. We provide our customers with annual reports to identify End-of-Life (EOL) concerns with our equipment and proactive notifications with a defined timeline and action plan for resolving EOL issues.

Midlife renewal support

Quester Tangent builds flexible products supported by a long-lasting service guarantee. We can easily support overhaul and retrofit projects by designing and delivering products that adapt to the form, fit, and function needs of our customers’ existing fleet or to meet new and additional requirements.

A to Z industry experience

We have more than 20 years of experience in designing modular solutions, building flexible products, providing system and network integration, and engineering services. We produce complete documentation, including product specifications, fault management plan, training materials, and user manuals.

Quality assurance

We have mature processes, industry-compliant products, and strong business practices backed by top-ranking project and supply chain quality audits. We drive operational expansion from the top down to ensure efficiency and growth. We hone our systems from the bottom up by embracing external and internal audits and feedback to increase customer and employee satisfaction.

Featured products

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Featured projects

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A comprehensive on-train and WMDS with seamless network integration for improved operations, maintenance, and secure wayside communications.

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TMS and PIS solutions expertly interface old coaches with new locomotives for better fleet compatibility and functionality.

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A monitoring system, delivered for a retrofit that enhances operational efficiency and supports superior train-to-wayside communication.

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