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PUBLIC SAFETY COMMUNICATIONS

Mission-Critical Communications That Just Work

We design, evaluate, and modernize the radio, broadband, alerting, and interoperability systems that connect every responder, every dispatcher, and every command post, when seconds matter most.

WHEN COMMS FAIL, EVERYTHING FAILS

One in Four Consoles Is Empty. The Calls Do Not Stop.

More than 6,100 emergency call centers answer 240 million 911 calls every year in the United States, riding on top of a land mobile radio network that now includes over 3,600 separate P25 systems, plus FirstNet broadband, legacy analog mutual-aid channels, and every console vendor in between. On any given day, those centers sit one-in-four seats short.

Interoperability was the lesson of Oklahoma City and 9/11. Two decades later, agencies still struggle to talk across jurisdictional lines at the exact moment it matters most. Sentinel Solutions Group brings operators and engineers to the same table, so the system you build is the system that still performs at three in the morning on the night everything goes wrong.

25%

Average 911 Dispatcher Vacancy Rate

6,100+

Emergency Call Centers in the U.S.

3,600+

P25 Systems Deployed Across the U.S.

CHALLENGE

The challenge we solve.

Most managed service providers treat land mobile radio like it is an enterprise WiFi problem. They miss P25 coverage prediction, they do not understand FirstNet priority and preemption contracts, and they certainly cannot engineer microwave backhaul resilience. When the radio fails, the response fails, and the communications shop takes the blame for a problem the vendor never understood. Sentinel brings the radio engineering discipline your agency actually needs. We assess coverage, design replacement migrations, negotiate tower leases, validate FirstNet capability, oversee site hardening, and build the governance that keeps your radio system mission-ready. Your field responders hear the tone; your dispatchers hear the PTT; your council hears the accountability.

THE COMMUNICATIONS REALITY

Built for when the radio
is the only thing that works.

Public safety communications are the invisible infrastructure on which every first responder depends. When cellular networks saturate, when fiber cuts, when power fails, the land mobile radio system has to keep working. Sentinel specializes in exactly these systems: P25 trunked radio, FirstNet prioritization and preemption, microwave and fiber backhaul, tower and site hardening, interoperability gateways, and the subscriber fleet management that keeps every radio in service. We understand the operational realities because we have engineered these networks from the ground up.

CHALLENGE

The challenge we solve.

Most managed service providers treat land mobile radio like it is an enterprise WiFi problem. They miss P25 coverage prediction, they do not understand FirstNet priority and preemption contracts, and they certainly cannot engineer microwave backhaul resilience. When the radio fails, the response fails, and the communications shop takes the blame for a problem the vendor never understood.
Sentinel brings the radio engineering discipline your agency actually needs. We assess coverage, design replacement migrations, negotiate tower leases, validate FirstNet capability, oversee site hardening, and build the governance that keeps your radio system mission-ready. Your field responders hear the tone; your dispatchers hear the PTT; your council hears the accountability.

COMMON CHALLENGES

Why Public Safety Comms Projects Stall, and Fail

Aging Analog & Conventional Systems

End-of-life conventional and early-digital systems no longer meet coverage, capacity, or feature expectations, yet the budget, governance, and migration planning to replace them is years behind.

Multi-Vendor Interoperability Gaps

Neighboring agencies on different vendors, bands, or generations of P25 cannot patch together a coherent talkpath when the mutual aid call comes in.

FirstNet & LTE Integration Confusion

Broadband promises convergence, but most agencies struggle to define when to use LTE PTT, when to bridge to LMR, and how to govern the policy layer underneath.

Inadequate In-Building Coverage

Hospitals, schools, parking structures, and high-rises routinely fail responder coverage tests, leaving crews unable to communicate at the moment they enter the structure.

Cybersecurity of Critical Comms

Land mobile radio used to be a closed system. Today, IP-connected dispatch, station alerting, and broadband devices represent a real and growing attack surface.

Funding & Lifecycle Planning Gaps

Agencies fund the build but not the refresh. Without a 10-15 year lifecycle plan tied to grant cycles and capital budgets, your system is obsolete the day it goes live.

OUR APPROACH

Operations First.
Engineering Discipline.
Vendor Neutrality.

We have run consoles, designed RF systems, defended budgets to elected officials, and stood up FirstNet alongside legacy LMR. That mix of operations, engineering, and governance is rare, and it is exactly what public safety communications projects need to actually succeed.

Vendor-Neutral Engineering

We do not take vendor commissions, resell hardware, or carry exclusive partnerships. Every recommendation we make is filtered through what is right for your agency, your geography, and your responders.

A Team, Not a Single Consultant

Every engagement draws on a bench of dispatchers, RF engineers, network architects, and compliance specialists. You get the right expert for the question on the table, not whoever happens to be on the contract.

Operations-First Design

Coverage maps and capacity models matter, but talkpaths, dispatch workflows, and station alerting matter more. We design systems around the work, not around the spec sheet.

Standards-Aligned Architecture

P25, NPSTC, NIST 800-53, FCC Part 90, FirstNet ICAM, we know the standards landscape and we engineer to it, so your system is interoperable, fundable, and audit-ready.

CORE CAPABILITIES

From Tower-Top to Talkgroup,
End-to-End Advisory

Organizational Change Management

Migrating to a new radio system, console, or alerting platform reshapes how every responder works. We build the training, communication, and adoption plans that make those transitions stick.

Risk & Coverage Assessment

Predictive coverage modeling, drive testing, in-building DAS evaluation, and gap analysis against P25, FirstNet, and NPSTC standards, with a roadmap to close the gaps.

Vendor Selection & Procurement

Vendor-neutral RFP development, technical evaluation, contract negotiation, and bid protest defense for radio systems, FirstNet integration, and dispatch consoles.

Program & Project Management

Multi-year radio system replacements, station alerting deployments, and FirstNet rollouts, with structured milestones, risk registers, and accountability for every workstream.

Managed Services & Staff Augmentation

Embedded subject-matter experts for system administration, talkgroup engineering, FirstNet ICAM management, and ongoing optimization.

Independent Verification & Validation

Third-party review of vendor coverage tests, factory acceptance, system commissioning, and lifecycle compliance, so you know you got what you paid for.
THE SENTINEL DIFFERENCE · CORE TO SUBSCRIBER

From core infrastructure to the radio in an officer's hand.

Public safety communications is a stack, P25 core, site infrastructure, subscriber fleet, interoperability, broadband convergence. We know every layer. This signature maps how Sentinel governs across all of them.

STEP 1 CORE Master site P25 core, zones, network management STEP 2 SITES RF infrastructure Towers, simulcast, coverage, backhaul CORE · SENTINEL MOBILE Portables · Mobiles Subscriber units, programming, fleet STEP 4 INTEROP Cross-agency ISSI, mutual aid, gateway bridges STEP 5 BROADBAND FirstNet · LTE MCPTT, push-to-X, hybrid convergence SENTINEL · FROM CORE TO SUBSCRIBER
Specialized Services

Specialized support for mission-critical communications.

Three ongoing services for the radio network that everything else runs on. Fleet programming kept current, interoperability codified into policy, and coverage validated against what firefighters and officers actually experience in the field.

01

Radio Provisioning & Fleet Management

Programming, firmware updates, template management, and lifecycle tracking across your radio fleet.

Embedded
02

Interoperability Governance & SOP Management

Development and enforcement of cross-agency communication protocols that hold up under pressure.

Oversight
03

Coverage Testing & Validation Program

Drive testing and in-building validation with documented performance reporting and gap remediation.

Optimization
Explore Specialized Services →

OUR PRACTICES

Four practices. One standard of delivery.

Every Sentinel engagement is governed by proprietary practices built for the realities of public safety communications technology, LMR, FirstNet, interop, and the tower-to-talkgroup chain that holds everything together, not borrowed from commercial IT playbooks.

PROGRAM MANAGEMENT

Sentinel Delivery Framework™

How we govern programs.

PMP-disciplined program governance structured for political visibility, audit defensibility, and multi-administration continuity. Every milestone, deliverable, and decision gate is designed for the public-sector reality, where council turnover, budget cycles, and federal funding rules shape the timeline more than any vendor’s project plan.

CHANGE MANAGEMENT

Sentinel Readiness Method™

How we prepare your people.

Organizational change management built for the radio shop, the dispatch console, and the tower top, not the corporate campus. We design adoption strategies informed by shift schedules, union dynamics, civil service rules, and the operational reality that your systems cannot go dark for training. When the new radio system goes live, the people behind the console are ready.

CONFIGURATION AUTHORITY

Sentinel Deployment Blueprint™

How we own the configuration.

Configuration authority for LMR programming, P25 system deployments, broadband-LMR integration, and PTT platform rollouts. Sentinel owns the foundational decisions around talkgroup architecture, encryption posture, roaming behavior, and fleet programming, producing the Blueprint, training, and administrator documentation that survives radio technician turnover and vendor personnel changes.

VALUE ASSURANCE

Sentinel Value Assurance™

How we prove the value.

Post-deployment governance for your public-safety communications investment. Sentinel independently measures whether coverage, interoperability, and reliability outcomes specified at procurement are being realized through real operational use, and documents vendor accountability when they are not.

Ongoing Retainer
Sentinel Sustain™

After engagement closes, Sentinel Sustain keeps the practice active across the life of the investment. Three tiers: Core, Active, and Strategic.

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DEEP EXPERTISE

We Speak Every Layer of the
Public Safety Comms Stack

LMR & P25 Architecture

  • P25 Phase 1 and Phase 2 trunked system design
  • Conventional, simulcast, and multicast configurations
  • VHF, UHF, 700/800 MHz band planning
  • ISSI and CSSI inter-system connectivity
  • Encryption (AES-256) and key management
  • Subscriber radio fleet planning and templating
  • Site hardening, backup power, and grounding

LTE, FirstNet & Broadband

  • FirstNet primary and extended primary user enrollment
  • Mission-critical push-to-talk (MCPTT) deployment
  • LTE-LMR interworking and gateway bridging
  • FirstNet ICAM and identity federation
  • Deployable assets (CRD, SatCOLT) integration
  • Band 14 priority and preemption tuning
  • 5G and Z-axis location services planning

Dispatch & CAD Integration

  • Console replacement and migration planning
  • CAD-to-radio integration (paging, alerting, status)
  • Multi-discipline dispatch (police/fire/EMS) talkpath design
  • NG911 i3 architecture and text-to-911 integration
  • Mutual aid talkgroup governance and provisioning
  • Recording, playback, and incident reconstruction
  • Backup dispatch and continuity-of-operations design

Station Alerting & Paging

  • Modern IP-based station alerting (US Digital, Phoenix G2, Locution)
  • Tone-and-voice fire dispatch integration
  • Volunteer pager and smartphone alerting integration
  • Bay door, lighting, and HVAC automation triggers
  • Quiet alerting and bunkroom-aware sequencing
  • Multi-station and combined dispatch alerting
  • Apparatus-aware response routing

In-Building & Coverage

  • BDA and DAS engineering for hospitals, schools, high-rises
  • NFPA 1221 and IFC 510 compliance design
  • Donor antenna site survey and noise floor analysis
  • Annual benchmark testing and AHJ coordination
  • Public safety vs. cellular DAS architecture
  • Tunnel, parking structure, and underground coverage
  • Class A vs. Class B repeater selection and placement

Interop, Governance & Cyber

  • Statewide interop governance (TICP, SCIP) alignment
  • Mutual aid agreement and talkgroup sharing protocols
  • NIST 800-53 and CJIS compliance for IP comms
  • Network segmentation for radio, CAD, and admin traffic
  • Vendor cyber posture assessment and SBOM review
  • Incident response planning for comms outages
  • Lifecycle and refresh planning tied to grant cycles

PITFALLS TO AVOID

Mistakes That Sink Comms Projects

01

Choosing Technology Before Requirements

Picking a vendor or platform before you have documented coverage targets, talkpath needs, and integration requirements is the single most expensive mistake agencies make.

02

Underestimating In-Building Coverage

Wide-area coverage looks great on the predictive map until your responders go inside the new hospital, school, or high-rise. Plan in-building from day one, not after the AHJ fails the inspection.

03

Ignoring Lifecycle From Day One

Radio infrastructure has a 10–15 year life. If you are not budgeting for the firmware refresh, console replacement, and tower lease renewal at procurement, you will be obsolete before you are paid off.

04

Vendor Lock-In Disguised as Standards

Every vendor claims P25 compliance. Few support full ISSI, open-standard subscriber programming, or non-proprietary key management. Read the spec sheet, then read the implementation.

05

Cybersecurity as a Bolt-On

IP-connected radio, alerting, and dispatch systems are real attack surfaces. Bolting cyber on after deployment is dramatically more expensive than designing it in from the start.

06

Skipping the Migration Plan

Cutover from one system to another, especially across multiple agencies, is a project unto itself. Without a parallel-operation plan, talkgroup mapping, and fallback strategy, go-live becomes go-disaster.

YOUR TEAM

Operators and Engineers in the Same Room

Jason Floyd

MANAGING PARTNER · ENGINEERING & TECHNOLOGY

Principal Systems Engineer on 50+ public safety deployments spanning P25 Land Mobile Radio, CAD, RMS, and the complex interfaces that connect them. Jason has engineered communications infrastructure at every scale, from rural county systems to statewide public safety networks.

Sandra S.

911/PSAP, P25 & RECORDS MANAGEMENT ADVISORY

Retired multi-discipline metropolitan Dispatch Center Director and board member for a regional P25 system. Sandra brings governance, policy, and operational experience from both the dispatch console and the radio network boardroom.

Also Supporting Your Program

With 15+ years in dispatch operations and another 15+ years inside two of the largest CAD/RMS vendors, Suzette designs training for the people who use public safety communications technology under pressure, not in a classroom.
HOW WE WORK TOGETHER

Four ways to bring Sentinel into a public safety communications program.

The right engagement depends on where the communications program is in the lifecycle. Each tier has its own scope discipline and its own deliverable cadence.

Sentinel Sustain

Managed Technology Subscription

End-to-end managed operations for the P25, LMR, FirstNet, and interoperability infrastructure Sentinel helped you stand up. Sustainment, vendor coordination, frequency-coordination discipline, and 24/7 incident response on the radio floor. The talkgroup is still patchable when the next mutual-aid call comes in, because someone is still accountable for the system.

We govern the program. We never sell the platforms.

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Sentinel Guardian

Retained Governance & Advisory

Ongoing retainer with quarterly governance reviews, pre-decision advisory, and an open line for council briefings, regional interoperability coordination, and radio vendor escalations. The communications program has independent counsel on the technology side of the table, before the next P25 upgrade, the next FirstNet decision, or the next contract cycle.

Sentinel documents. We do not litigate.

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Practice-Led Engagement

Anchored to one of the four signature practices

Anchored to one of SDF, SRM, SDB, or SVA. Best when the program knows which discipline is needed: a P25 migration program, FirstNet adoption change readiness, configuration authority on interoperability patches, or post-deployment outcome governance. Fixed scope, named practice, defined deliverables.

Independent. Practitioner-led. Vendor-neutral.

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The Integrated Package

Specialized Services + Practice + Institute

A specialized service plus a signature practice plus Sentinel Institute training, packaged as a single integrated engagement. For programs standing up a new communications architecture from scratch and building the institutional capacity to run it across mutual-aid partners.

Cutting-edge. Never bleeding-edge.

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READY TO MODERNIZE YOUR COMMS?

Let’s Build Comms That Hold Up
at 3 a.m. on the Worst Day

Whether you’re planning a full P25 system replacement, integrating FirstNet alongside your legacy LMR, deploying station alerting across a combination department, or just need an honest second opinion on a vendor proposal, Sentinel brings the operations and engineering experience to get it right.
Schedule a Consultation