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Top Security Companies in Houston, TX (78)

Dragos
Security • Cybersecurity
6 Offices
295 Employees
32 Benefits Hiring Now
Join a mission that can save the world.

Dragos is an industrial (OT/ICS/IIoT) cybersecurity company on a mission to safeguard civilization. Our integrated software platform provides critical visibility into ICS and OT networks so that threats are identified, and can be addressed before they become significant events, our solutions are optimized for emerging applications like the Industrial Internet of Things (IIoT), enabling our clients in power and water...

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Dragos

Dragos's Top Stability & Growth Strengths

Strong Revenue Growth: The combined Dragos/runZero/NetRise business is described as having materially higher annual recurring revenue by mid-2026, pointing to robust year-over-year momentum. Although the figure reflects the group rather than Dragos alone, it demonstrates significant demand and scale around the platform.

Investor Backing & Capital Strength: A majority investment by Accenture at a multibillion-dollar valuation, together with substantial prior funding, indicates strong financial support and confidence in future expansion. This capital access is positioned to accelerate go-to-market reach and platform scaling.

Product Line Growth: Acquisitions of Phosphorus, runZero, and NetRise in 2026 expanded the offering from core OT security into xOT, exposure management, and software supply-chain security. This broadening of scope increases the addressable market and deepens the platform’s relevance.

Safe Haven Security Services, LLC.
Internet of Things • Professional Services • Security
70 Offices
1,109 Employees
Hiring Now

Safe Haven Security Services, LLC is a prominent ADT-authorized dealer and security provider founded in 1999. The company specializes in residential security systems, monitoring solutions, and home automation, positioning itself as a national leader in the industry. With headquarters in North Kansas City, MO, and over 100 office locations, it provides comprehensive security and alarm services to homeowners and businesses...

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Safe Haven Security Services, LLC.
Allied Fire Protection
5 Offices
348 Employees
Hiring Now

Allied Fire Protection is dedicated to protecting lives and property through expert fire protection solutions. From our corporate headquarters in Houston, we proudly serve communities across Austin, San Antonio, Laredo, the Rio Grande Valley, Dallas/Fort Worth, Tampa, and Nashville — delivering safety, reliability, and peace of mind wherever we go.

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Allied Fire Protection
VSC Fire & Security, Inc.
30 Offices
799 Employees
24 Benefits Hiring Now
Fire safety: Inspection and installation of fire sprinkler, fire alarm, security, life safety and low voltage systems.

For more than 65 years, VSC Fire & Security, has partnered with thousands of customers as a trusted contractor for the inspection and installation of fire sprinkler, fire alarm, security, life safety and low voltage systems. VSC Fire & Security, has over 1,800 talented employees, and more than 950 vehicles throughout our footprint which spans the East Coast, and West...

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VSC Fire & Security, Inc.
Firetrol Protection Systems, Inc.
Professional Services • Security • Industrial • Manufacturing
3 Offices
660 Employees
Hiring Now

Firetrol Protection Systems is a full-service fire protection and life safety contractor. The company specializes in the design, fabrication, installation, inspection, and maintenance of a wide range of fire suppression, alarm, and integrated security systems. Serving diverse sectors including healthcare, industrial, government, and commercial properties, Firetrol provides comprehensive life safety solutions through its experienced team of engineers, technicians, and project...

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Firetrol Protection Systems, Inc.
PINKERTON
Security
56 Offices
1,604 Employees
9 Benefits Hiring Now

Pinkerton traces its roots to 1850 when Allan Pinkerton founded Pinkerton's National Detective Agency. Today, Pinkerton offers organizations a range of comprehensive risk management services from security consulting and investigations to executive protection, employment screening and protective intelligence. With employees and offices worldwide, Pinkerton maintains an unmatched reputation for protecting clients and their assets around the globe.

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PINKERTON
NETSYNC
Cloud • Information Technology • Security • Cybersecurity
10 Offices
450 Employees
11 Benefits Hiring Now

Netsync specializes in collaboration & unified communications, data center and cloud, network infrastructure and others. NETSYNC is an NMSDC-certified minority business enterprise (MBE), federally certified woman-owned small business (WOSB), and HUB-certified value-added reseller (VAR), specializing in the implementation of comprehensive IT life cycle solutions for a wide array of organizations. As a Cisco Gold, Master Collaboration, and Master Security Partner; an HP...

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NETSYNC
Securitas Security Services USA, Inc.
Professional Services • Security • Consulting
211 Offices
95,000 Employees
Hiring Now

Securitas Security Services USA, Inc. is a leading provider of customized security and guarding solutions. The company offers a comprehensive range of protective services, including on-site guarding, mobile patrols, remote monitoring, and electronic security. They also provide specialized services in fire and safety, corporate risk management through Pinkerton, and professional consulting and investigations to help safeguard people, property, and information.

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Securitas Security Services USA, Inc.
Andy Frain Services
Events • Professional Services • Security • Industrial
13 Offices
3,979 Employees
14 Benefits Hiring Now

Andy Frain Services leads in comprehensive security and event solutions, delivering reliable business security for offices, warehouses, plants, and facilities.

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Andy Frain Services
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Convergint Federal Solutions
Professional Services • Security • Cybersecurity • Defense
21 Offices
350 Employees
Hiring Now

Convergint Federal Solutions is a global, service-based systems integrator and a wholly owned subsidiary of Convergint Technologies. The company provides a suite of programmatic and project management tools to facilitate system optimization at federal and military installations worldwide. They specialize in deploying innovative, scalable security and cybersecurity solutions that ensure consistent risk management and strict adherence to federal regulatory compliance...

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Convergint Federal Solutions
Viking Group Inc.
Professional Services • Security • Industrial • Manufacturing
32 Offices
333 Employees
36 Benefits Hiring Now

Viking Group Inc. designs, manufactures, and distributes fire protection and life safety systems, offering a comprehensive range of products and global services.

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Viking Group Inc.
Aventiv Technologies
Big Data • Information Technology • Security • Software
5 Offices
1,001 Employees
32 Benefits Hiring Now

Aventiv Technologies is a diversified technology company that provides innovative solutions to customers in the corrections and government services sectors. Aventiv is the parent company to Securus Technologies and AllPaid, leading providers of innovative products and services. The collective power of these unified organizations deliver superior value and service to all of our customers nationwide. We believe society improves when modern...

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Aventiv Technologies
Acadian Companies
Healthtech • Professional Services • Security • Transportation
17 Offices
4,000 Employees
3 Benefits Hiring Now

Acadian Companies, founded in 1971, is a diverse group specializing in medical transportation, pre-hospital care, healthcare, safety, security, training, and charter flight services.

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Acadian Companies
International SOS
Healthtech • Security
58 Offices
11,057 Employees
28 Benefits Hiring Now

The International SOS Group of Companies is in the business of saving lives, protecting global workforces from health and security threats. We deliver customised health, security risk management and wellbeing solutions to fuel our clients’ growth and productivity. In the event of extreme weather, an epidemic or a security incident, we provide an immediate response providing peace of mind. Our...

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International SOS
Parsons Corporation
Information Technology • Security • Cybersecurity
33 Offices
14,420 Employees
31 Benefits Hiring Now

Parsons is a digitally enabled solutions provider with a focus on making the world safer, smarter, healthier, more sustainable, and more connected. Founded in 1944, Parsons primarily serves the defense, security, and infrastructure markets. Uniquely qualified to deliver cyber/converged security, technology-based intellectual property, and other innovative services, the corporation delivers state-of-the-art solutions to federal, regional, and local government agencies as...

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Parsons Corporation

Parsons Corporation's Top Stability & Growth Strengths

Strong Market Position & Advantage: Parsons is positioned as a leader in key niches, supported by independent rankings such as ENR’s No. 1 global program management placement and strong standings in design/engineering and defense-revenue lists. Contract momentum with multiple large single-award wins and a sizable pipeline further reinforces competitive strength in its priority lanes.

Profitability: Profitability appears to be improving even amid revenue variability, with record adjusted EBITDA margin and record net income cited for 2025. This indicates stronger mix, pricing, and execution discipline that supports resilience through topline fluctuations.

Resilient & Sustainable Growth: Visibility into forward work is supported by a large backlog and a record funded-backlog level, which improves near-term conversion potential. Management guidance pointing to a return to revenue growth and continued EBITDA expansion adds to the view that the core portfolio is stabilizing after a one-program step-down.

Affiliated Monitoring, Inc.
Cloud • Internet of Things • Security • Infrastructure as a Service (IaaS)
2 Offices
233 Employees
Hiring Now

Affiliated Monitoring, Inc. is a U.S. life‑safety and alarm monitoring company founded in 1977. Operating two geographically redundant, UL‑listed and TMA Five Diamond monitoring centers, Affiliated delivers 24/7 alarm, fire, video and PERS monitoring and a hosted CSaaS platform (Alpine) to security dealers, IoT and PERS providers across North America with emphasis on redundancy, compliance and enterprise uptime.

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Affiliated Monitoring, Inc.
Ascend Performance Materials
Hardware • Other • Security • Biotech
8 Offices
2,500 Employees
34 Benefits Hiring Now

As the world's largest fully integrated producer of PA66, we designed our vertically integrated manufacturing process to ensure quality, consistency and supply security. Headquartered in Houston, Texas, Ascend has nine global locations, including five fully integrated manufacturing facilities in the southeastern United States and an engineering plastics compounding facility in Europe, all dedicated to the innovation and safe production of nylon...

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Ascend Performance Materials
Liongard
Cloud • Security • Software
Houston
104 Employees
23 Benefits Hiring Now

Liongard unifies and automates the management and protection of modern IT environments at scale for MSPs and Enterprise IT Operations.

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Liongard
Kroll
Big Data • Security • Software • Analytics • Cybersecurity
25 Offices
5,001 Employees
17 Benefits Hiring Now

Kroll is the world’s premier provider of services and digital products related to valuation, governance, risk and transparency. We work with clients across diverse sectors in the areas of valuation, expert services, investigations, cyber security, corporate finance, restructuring, legal and business solutions, data analytics and regulatory compliance. Our firm has nearly 5,000 professionals in 30 countries and territories around the...

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Kroll

Kroll's Top Stability & Growth Strengths

Strong Market Position & Advantage: Multiple third-party descriptions and industry recognitions portray Kroll as a leading independent provider in financial and risk advisory, with top placements in areas like fairness opinions and investigations/forensics. Scale signals such as a global workforce and long operating history reinforce a durable competitive position.

Market Expansion: Evidence points to active expansion through new practices (e.g., Economics and Decision Intelligence), geographic build-outs, and acquisitions across regions including APAC, Europe, and Latin America. Announcements of added services and locations indicate an expanding footprint.

Diversified Revenue Streams: A broad portfolio spanning valuation, investigations, due diligence, compliance, cyber/MDR/IR, restructuring, and agency/trustee services suggests multiple demand drivers. Recognition across several distinct service lines implies revenue is not dependent on a single offering.

Marksman Security Corporation
Information Technology • Security
13 Offices
650 Employees
15 Benefits Hiring Now

Marksman Security Corporation is a public safety company that offers security guards and residential security services.

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Marksman Security Corporation

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