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Summary: Mission to Modernize Defense Navigation
Technology Advancement Group (TAG), a veteran-owned small business and trusted systems integrator, recognized a dangerous paradox on the modern battlefield. While electronic warfare has evolved, many warfighters remained reliant on the Defense Advanced GPS Receiver (DAGR), a legacy platform that is being outpaced by the demands of the digital battlefield. To bridge the gap and provide reliable support to warfighters in today’s contested environment, TAG envisioned a new generation of military navigation systems: the Joint Modernized Handheld (JMHH).
TAG drew from their deep experience working with military warfighters to design and develop a device that worked for the military. As TAG completed the prototyping and testing, they partnered with Plexus to draw on our deep technical expertise and ability to scale their warfighter-informed design to meet the needs of the entire defense ecosystem. By applying engineering services rooted in User-Centered Design (UCD), Plexus collaborated with TAG to mature a brilliant prototype into a military reality, ensuring the JMHH was ready for the modern battlefield.
TAG: A Disruptive Pioneer in Defense Technology
Since 1984, TAG has served as a trusted systems integrator for the Department of Defense. As innovators dedicated to creating field-ready user equipment, TAG specializes in technology that remains resilient in the world’s most demanding environments.
TAG recognized a critical vulnerability in current military GPS systems: the legacy DAGR was never designed for today’s jamming and spoofing threats. Its interface and rapid power consumption often forced soldiers to use vulnerable civilian devices like smartphones for navigation, a shadow GPS risk that endangers missions.
TAG’s JMHH was designed to be the revolutionary answer: a 1-for-1 DAGR replacement that combines smartphone-like usability with the ruggedized A-PNT (Assured Positioning, Navigation and Timing) security required for the warfighter. However, bringing this revolutionary vision to the front lines and the path to modernize the military handheld GPS was a complex engineering feat. The JMHH had to be a modern powerhouse that could still integrate with military hardware designed decades ago, while meeting stringent MIL-STD-810H standards.
As the project moved towards these rigorous demands, TAG faced a market barrier: transitioning a rapid prototype design into a highly regulated military product. To maintain the momentum, TAG needed a partner who could match their agile culture while providing the deep technical discipline and defense product development expertise necessary for a successful military launch. TAG found that extension of their team in Plexus.
The Plexus Solution: Engineering for the Warfighter
The collaboration between TAG and Plexus began not as a hand-off, but as a total integration of expertise. The partnership launched with a high-intensity, workshop-style engagement that embedded Plexus’ senior program management and engineering leads directly within the TAG team. This unified team conducted a real-time “stress test” of the project’s technical roadmap. This environment of transparency allowed the joint team to identify critical design gaps and supply chain vulnerabilities in a matter of days, not months. The result was a suite of synchronized Scopes of Work (SOWs) designed to accelerate product maturity and align with contract requirements.
Technical Synergy: From Concept to Combat-Ready
With a synchronized roadmap in place, the joint team transitioned from strategic alignment to high-velocity execution. By leveraging Plexus’ defense product development expertise as an extension of TAG’s vision, the team tackled the complex transition from a high-fidelity prototype to a scalable, military-grade GPS solution. This phase focused on three critical pillars: user-centricity, structural ruggedization and regulatory readiness.
User-Centered Design
The JMHH was not designed in a vacuum; it was forged in the field. TAG’s focus on warfighter engagement, refined the prototypes and fed a feedback loop that Plexus and TAG used to transcend basic technical specs. Both companies made real-time adjustments in ergonomics, interface responsiveness and tactical button placement to deliver a device ready for the high-stress reality of combat in a form that is intuitive and reliable.
Ruggedization for the Real World
To move the JMHH from a concept to a field-ready asset, the joint team undertook a comprehensive architectural redesign of the device enclosure. While the initial prototypes utilized 3D-printed components for rapid proof-of-concept, they lacked the durability and scalability required for active-duty deployment. Plexus led the transition to high-precision injection molding, fundamentally re-engineering the device to exceed the rigors of MIL-STD-810H standards.
A critical pillar of this redesign was the implementation of a multifaceted ingress protection (IP) strategy. Recognizing that the initial design had not fully accounted for environmental exposure, Plexus engineered custom sealing interfaces and structural reinforcements. These enhancements ensured mission-critical reliability against water and dust ingress in extreme environments, all while maintaining the device’s intuitive user interface and ergonomic requirements.
Regulatory and Supply Chain Readiness
While physical ruggedization proved the device could survive the field, the final requirement was proving the program could scale with absolute reliability. To meet this mandate, the joint team executed a design-led risk mitigation strategy to optimize the JMHH architecture.
Plexus applied its comprehensive Design for Excellence (DFX) framework, integrating Design for Manufacturability (DFM) and Design for Test (DFT) principles into the core of the architectural redesign, including the addition of test access points for automated testing. This proactive approach ensured that high-scale production would achieve maximum quality and yield from the very first unit.
Simultaneously, the team mobilized to generate the comprehensive Contract Data Requirements List (CDRL) documentation. By providing the DoD with transparent, highly detailed manufacturing plans and systems engineering data, the partnership delivered the level of programmatic mission assurance necessary for formal program approval and long-term success.
Results and Impact: Accelerating Mission Readiness
The collaboration between TAG and Plexus serves as a definitive model for defense electronic manufacturing services. By aligning Plexus’ engineering rigor with TAG’s disruptive vision, the partnership transformed the development timeline, reclaiming critical weeks and accelerating the path to mission readiness:
- Reclaiming the Development Timeline: Through a cumulative effort that mobilized a full-scale cross-functional engineering team, Plexus effectively compressed the maturation timeline. By identifying and resolving manufacturing hurdles early in the design phase, the team reclaimed an estimated 52 weeks of development time.
- Decoupling Hardware and Software Risk: In complex defense electronics, hardware maturation is often a bottleneck for software deployment. Plexus’ intervention shifted the critical path away from mechanical and electrical maturation. This allowed TAG to focus its internal resources on third-party software and module integration in a parallel workstream, significantly reducing total system risk.
- A Blueprint for Sole-Source Success: Plexus delivered CDRL documentation that provided the necessary validation of quality, yield and scalability required for formal DoD program approval.
Mission Success Secured: Advancing A-PNT technologies
The transformation of the JMHH from a visionary concept into a combat-ready reality represents more than just a technical win; it is a force multiplier for the modern warfighter. By functioning as a seamless extension of TAG’s team, Plexus bridged the gap between rapid prototyping and rigorous production that allowed TAG to remain focused on their revolutionary vision for the warfighter.
Our mission at TAG is to deliver trusted, resilient navigation tools for warfighters. Partnering with Plexus let us focus on this vision while they expertly handled engineering and production at scale, turning our prototype and design concept into a combat-ready PNT solution.
Jon Ruffier • TAG COO
This partnership proves that with transparency and technical alignment, even the most aggressive defense timelines are achievable. Today, the JMHH stands as a testament to what is possible when disruptive innovation meets high-velocity discipline, ensuring that those on the front lines have a tool they can trust. As TAG and Plexus look toward the future, this model of collaborative execution remains the blueprint for bringing the next generation of essential defense technology to the field.
