everything RF recently interviewed Tim Last, the Executive Vice President, Sales and Marketing at Iridium Communications Inc. Since joining Iridium in 2012, he has held roles of increasing responsibility within the sales and marketing organization. Tim served as Senior Vice President and General Manager of their Americas region prior to assuming his current role. Before joining Iridium, Mr. Last served in business development roles with the telecommunication companies Orbcomm and BT Global Services. He holds a Master of Science degree in telecommunications business from University College London.
Q. Iridium has undergone a remarkable transformation since its original launch - from pioneering global satellite telephony to becoming a leading provider of resilient satellite connectivity and PNT services. Can you walk us through Iridium’s journey and the key milestones that have shaped the company into what it is today?
Tim Last: Iridium’s evolution is a story of focus, resilience, and experience. We were LEO before LEO was “cool”, launching and operating the first truly global low Earth orbit network in the late 1990s and proving what was possible with space-based connectivity. That early chapter shaped our DNA and gave us unmatched operational expertise that we’ve expanded on today.
Over the years, we’ve continued to sharpen our mission around delivering highly reliable, truly global connectivity for mission-critical use. The launch of our second-generation constellation was the defining milestone, modernizing the network and creating a platform for growth across data, IoT, and real-time services, including global aircraft tracking.
Today, Iridium is a multi-service platform grounded in decades of LEO experience, designed to deliver always-on connectivity and support the next generation of global applications. From there, our evolution has been deliberate. We’ve expanded into areas like resilient PNT to address growing vulnerabilities in GNSS, building on the strength of our architecture, L-band spectrum, and global coverage.
Q. How is Iridium’s portfolio structured today across satellite communications, IoT connectivity, and PNT services, and which industries or applications are currently driving the strongest demand for these solutions?
Tim Last: Iridium’s truly global, weather-resilient satellite network is designed for mission-essential communications that you can depend on. Governments, industries, and innovators worldwide rely on us to connect, protect, and perform everywhere on Earth. We’re the network relied on for the safety of life, whether it’s aviation safety services, maritime emergency systems, protecting GPS devices, defense communications, or a hiker in need of help.
IoT is one of our fastest-growing markets, driven by asset tracking, remote monitoring, and autonomous applications. Our positioning, navigation, and timing (PNT) service is another rapidly important layer focused on resilience. The strongest demand comes from industries like maritime, aviation, defense, emergency response, and critical infrastructure, where global coverage and reliability are essential.
Q. Iridium operates one of the world’s few truly global LEO satellite constellations. What differentiates your network architecture and service model from other satellite connectivity providers, and how does this influence the types of applications you can support?
Tim Last: The defining feature of Iridium’s satellite network is our crosslinked LEO architecture, which allows our satellites to communicate with each other in space rather than relying solely on ground infrastructure. This enables continuous global coverage, including the poles, and reduces latency while improving resilience. Because of this unique design, we can support real-time, mission-critical applications anywhere on Earth. It also means our customers are not dependent on regional gateways, which is a major advantage in remote or disrupted environments. Additionally, our L-band spectrum is valuable in that it provides reliable, always-on connectivity, even in remote or harsh conditions. Its ability to work through inclement weather and in gaps where Ka and Ku- band don’t reach makes it an essential hybrid communications component.
As for the service model, we have developed and nurtured an extensive ecosystem of technology integrators, developers, and manufacturers producing a wide variety of solutions across the markets we serve. We win not by believing we can build everything for everyone, but by partnering with the best around the world with that expertise.
Q. What drove Iridium to expand into Positioning, Navigation, and Timing (PNT) services, and how does this capability complement traditional GNSS-based systems such as GPS?
Tim Last: The Iridium network is uniquely suited to address the growing threats of GNSS jamming and spoofing, which have become more prevalent in recent years. Interference, whether accidental or intentional, is becoming more common. Iridium PNT provides an independent, satellite-based source of timing and positioning that complements systems like GPS. It adds a layer of assurance, allowing devices and networks to maintain accurate timing even when GNSS signals are compromised. A PNT signal from our global network works indoors, at sea, in the air, and during GPS or GNSS outages. Even when interference, spoofing, or jamming stop other systems, Iridium PNT keeps critical systems connected and in sync, serving as the truth. This approach not only enhances the resilience of PNT systems but also ensures that devices can maintain accurate time synchronization even when GNSS signals are unavailable or denied.
Irdium PNT
Q. Where are you currently seeing the strongest adoption of Iridium’s PNT solutions, and which applications or industries stand to benefit most from resilient, satellite-based timing and positioning services?
Tim Last: We’re seeing the strongest adoption in sectors where timing integrity is critical. That includes defense, aviation, maritime, and telecommunications networks, as well as energy infrastructure like power grids. These industries depend on precise timing for synchronization and safety. As awareness of GNSS vulnerabilities grows, we’re also seeing increasing interest from financial services and autonomous systems.
Q. With GNSS jamming and spoofing becoming an increasing concern worldwide, how does Iridium PNT enhance the robustness and continuity of positioning and timing in GNSS-denied or degraded environments?
Tim Last: Iridium PNT enhances resilience by providing a separate signal from a different orbital architecture than GNSS. Because it operates in LEO and uses signal characteristics with unique cryptographic techniques, it is inherently more difficult to disrupt in the same way. When GNSS is degraded or unavailable, Iridium PNT can maintain trusted timing and positioning. This continuity is critical for systems that cannot tolerate outages or inaccuracies.
Q. For engineers designing systems that require highly reliable timing or positioning, what are the key considerations when evaluating and selecting a resilient PNT solution?
Tim Last: Engineers should prioritize independence from GNSS, signal integrity, and global availability. It’s also important to consider how easily the solution integrates with existing systems and how it performs in degraded environments. Power efficiency and hardware simplicity matter, especially for distributed or remote deployments. Ultimately, the solution must provide a verifiable, trusted output under all conditions. Iridium PNT solutions are easy to install, give users complete situational awareness, and protect global high-value assets.
Q. Non-Terrestrial Networks (NTN) are becoming an increasingly important part of the global connectivity landscape. How does Iridium view the evolution of NTN, and what role do you see your network and technologies playing within the broader NTN ecosystem?
Tim Last: We see NTN evolving into a seamless extension of terrestrial networks rather than a separate layer. NTN is not about replacing terrestrial networks, but about completing them and helping to more easily extend coverage to oceans, airspace, remote land regions, and disaster zones where terrestrial infrastructure is impractical or unavailable. Iridium already operates as a foundational NTN provider with a global LEO constellation and licensed L-band spectrum, which enables truly global, independent coverage. With Iridium NTN Direct, we are aligning our satellite capabilities directly with cellular chipsets and 3GPP-defined protocols. This allows mobile network operators and device manufacturers to more easily integrate satellite connectivity without redesigning their core architectures and accelerate adoption at scale. The long-term opportunity lies in deep interoperability, where satellite is natively embedded into devices, IoT systems, and mobile networks as a standard capability.
Q. Many Iridium-enabled devices operate in harsh maritime, aviation, industrial, and defense environments. What are the primary engineering challenges in designing ruggedized satellite terminals for these demanding applications?
Tim Last: The biggest challenges are environmental and operational extremes. Devices must withstand temperature swings, vibration, moisture, and corrosion, often over long lifecycles. Power efficiency is also critical, especially for remote or battery-operated systems. At the same time, the hardware must remain simple, reliable, and easy to integrate. Designing for all of that simultaneously requires careful trade-offs and rigorous testing.
Q. Iridium recently introduced the Iridium 9604, a new three-in-one IoT module integrating satellite, cellular, and GNSS into a single platform. What market needs and customer challenges drove the development of this product, and how do you see unified multi-mode connectivity platforms changing the way next-generation global IoT solutions are designed and deployed?
Tim Last: Customers increasingly want simplicity and flexibility in a single device. Managing separate satellite, cellular, and GNSS modules adds cost, complexity, and integration challenges. The Iridium 9604 was designed to address that by combining those capabilities into one platform and is ideal for developers who need speed, flexibility, and global scalability. This kind of unified approach allows devices to intelligently switch between networks, improving coverage and efficiency. The Iridium 9604 will accelerate deployment and enable more scalable global IoT solutions.
Q. How do you see satellite connectivity evolving alongside terrestrial technologies such as 5G, private LTE, and edge/cloud platforms, and what role will hybrid network architectures play in future connected systems?
Tim Last: Satellite and terrestrial networks are converging into hybrid architectures that deliver seamless connectivity for global use cases. Technologies like 5G and private LTE will handle dense, high-capacity environments, while satellite will fill coverage gaps and provide resilience. Edge and cloud platforms will tie everything together, enabling real-time data processing and decision-making. The future is not one network replacing another, but all of them working together.
Q. Looking ahead, where do you see the greatest opportunities for Iridium over the next several years, and what new capabilities or service innovations can customers expect from the company in the near future?
Tim Last: The biggest opportunities lie in resilience, integration, and scale as connectivity becomes a critical dependency across industries. A key driver is NB-IoT, which allows massive, low-power IoT deployments to operate efficiently across both terrestrial and satellite networks. Through solutions like Iridium NTN Direct, we can extend this standard into space, enabling simple, scalable connectivity for remote and mission-critical applications.
We also expect continued growth in IoT, expanded use of PNT capabilities, and tighter integration across global NTN ecosystems. The end state is seamless multi-network connectivity where devices automatically stay connected anywhere in the world, with a focus on reliability, simplicity, and global reach.
About the Company:
Iridium Communications is a global provider of mobile voice and data services delivered through its unique low Earth orbit (LEO) satellite constellation, offering reliable connectivity across the entire planet, including remote oceans, airspace, and polar regions where traditional networks are unavailable. Headquartered in McLean, Virginia, the company operates a network of 66 cross-linked satellites that enable real-time communication for industries such as maritime, aviation, government, emergency services, and IoT. Iridium’s solutions are known for their resilience, global coverage, and low-latency performance, making them critical for mission-critical applications in some of the world’s most challenging environments.
