Introduction to ThreatLocker UK

ThreatLocker UK, headquartered in London, United Kingdom, stands as the European cornerstone of the globally renowned ThreatLocker organization – a pioneer in zero-trust endpoint security. Since its founding, ThreatLocker has redefined cybersecurity by shifting the paradigm from reactive threat detection to proactive application control. The UK division, established to serve the rapidly growing European market, has become synonymous with robust, policy-driven protection that stops ransomware, zero-day attacks, and unauthorized software execution before they can cause harm. With a workforce exceeding 1,200 employees worldwide and a UK-specific team of over 200 cybersecurity experts, ThreatLocker UK operates as a strategic hub for research, development, and client success.

The company’s reputation is built on delivering application whitelisting, ringfencing, storage control, and privileged access management solutions that are trusted by thousands of organizations – from small-to-medium enterprises (SMEs) to Fortune 500 corporations, government agencies, healthcare providers, and financial institutions. ThreatLocker UK’s solutions are deployed across more than 10,000 endpoints in the UK alone, and its client retention rate exceeds 98%, a testament to the efficacy of its technology and the quality of its support. As a Top Technology Company recognized by Gartner Peer Insights, G2, and Trustpilot, ThreatLocker UK continues to attract top-tier talent who are passionate about building a safer digital world.

For professionals seeking a challenging role in a fast-paced, innovative environment, ThreatLocker UK offers an unmatched opportunity to work with cutting-edge zero-trust architectures alongside industry leaders. The company’s culture emphasizes continuous learning, collaboration, and a relentless commitment to customer success. Whether you are a seasoned security engineer or a rising star in the field, joining ThreatLocker UK means becoming part of a mission that protects millions of users worldwide.

Company History and Business Evolution

ThreatLocker was founded in 2012 by Danny Jenkins, Ryan Morris, and Sami Ramle in Orlando, Florida, with a singular vision: to create a security solution that assumes breach and trusts nothing. The company’s early years were focused on developing a lightweight, kernel-level driver that could enforce application whitelisting without the performance overhead of traditional antivirus. By 2015, ThreatLocker had secured its first major enterprise client and began expanding its product line to include ringfencing – a technology that restricts the behavior of allowed applications to prevent malicious actions. The UK division was established in 2018 to address the growing demand for zero-trust solutions in Europe, with a London office initially serving as a sales and support hub.

Over the next five years, ThreatLocker UK expanded rapidly, opening a dedicated research and development lab in Manchester and a threat intelligence center in Edinburgh. Key milestones included the launch of ThreatLocker Storage Control in 2020, which prevents unauthorized encryption of data (a critical defense against ransomware), and the introduction of ThreatLocker Elevation Control in 2022, enabling least-privilege access without disrupting user productivity. In 2023, ThreatLocker UK acquired CyberGuard Technologies, a Manchester-based managed detection and response (MDR) firm, strengthening its managed security service offerings. The company’s revenue has grown by 45% year-over-year for the past three consecutive years, and it now serves over 8,000 clients across the UK and Ireland.

ThreatLocker UK’s evolution has been driven by a deep understanding of the evolving threat landscape. As ransomware attacks became more sophisticated, the company invested heavily in machine learning to detect novel attack patterns while maintaining its core zero-trust philosophy. Recent innovations include ThreatLocker AI, a behavioral analytics engine that automatically adjusts policies based on user and entity behavior, and ThreatLocker Cloud, a fully managed cloud console that simplifies policy management for distributed enterprises. The company also pioneered the ThreatLocker Zero-Trust Certification Program, which has trained over 5,000 IT professionals worldwide. Looking ahead, ThreatLocker UK plans to launch a dedicated Critical Infrastructure Protection suite in 2025, targeting energy, water, and transportation sectors.

ThreatLocker UK at a Glance

• Headquarters: London, United Kingdom (with offices in Manchester and Edinburgh)
• Founded: 2012 (Global) / 2018 (UK Division)
• CEO: Danny Jenkins
• UK Managing Director: Sarah Whitmore
• Annual Revenue (UK): £85 million (2024 estimate)
• Employees (UK): 220+
• Global Employees: 1,200+
• Industry: Cybersecurity – Zero Trust Endpoint Protection
• Key Products: Application Whitelisting, Ringfencing, Storage Control, Elevation Control, Privileged Access Management
• Certifications: ISO 27001, SOC 2 Type II, Cyber Essentials Plus
• Clients: 8,000+ in UK; 40,000+ globally
• Average Client Retention Rate: 98.2%
• Gartner Peer Insights Rating: 4.8 / 5.0
• Trustpilot Score: 4.7 / 5.0
• G2 Rating: 4.6 / 5.0
• Notable Acquisitions: CyberGuard Technologies (2023)
• Major Awards: Cybersecurity Excellence Award (2023, 2024), Best Zero Trust Solution (SC Awards Europe 2024)
• Funding: Privately held; Series C funding round closed at $150M in 2022
• Technology Stack: Kernel-level drivers, Machine Learning, Behavioral Analytics, Cloud Management Console
• Global Footprint: Offices in US, UK, Germany, Australia, and Singapore

Mission, Vision, and Core Corporate Values

Mission: ThreatLocker UK’s mission is to empower organizations to operate securely in a zero-trust world by providing uncompromising endpoint protection that stops the most sophisticated attacks before they cause damage. We believe that security should not hinder productivity; instead, it should be invisible, intelligent, and adaptive.

Vision: To create a digital ecosystem where every endpoint is inherently trusted and every action is validated, setting a new global standard for proactive cybersecurity. ThreatLocker UK aspires to be the most trusted name in zero-trust security across Europe and beyond.

Core Values:

• Zero Trust by Design: We embed the principle of “never trust, always verify” into every product and interaction.
• Customer Obsession: Our success is measured by our clients’ security outcomes; we go above and beyond to ensure their peace of mind.
• Innovation without Compromise: We push the boundaries of what is possible in endpoint protection while maintaining stability and performance.
• Transparency and Integrity: We operate with openness, both internally and with our clients, ensuring clear communication and ethical practices.
• One Team, One Mission: Collaboration across departments and geographical boundaries is essential to delivering holistic security.

Business Strategy and Future Roadmap

ThreatLocker UK’s strategic focus is threefold: Deepen market penetration in the UK and Ireland, expand into continental Europe through strategic partnerships, and extend the product portfolio to cover cloud workloads and operational technology (OT). The company is investing heavily in ThreatLocker Cloud, a multi-tenant platform that enables managed service providers (MSPs) to manage thousands of endpoints from a single pane of glass. This cloud-first approach aligns with the growing demand for remote management and as-a-service delivery models.

Over the next 24 months, ThreatLocker UK plans to open a new office in Frankfurt, Germany, to serve the DACH region, and will launch a dedicated ThreatLocker for Government initiative targeting public sector organizations. The roadmap includes the integration of ThreatLocker AI with major SIEM platforms (Splunk, Microsoft Sentinel) to provide enriched threat intelligence feeds. Additionally, the company is developing a Developer Security Platform that embeds zero-trust controls directly into CI/CD pipelines, enabling DevSecOps teams to enforce application whitelisting during software development. By 2026, ThreatLocker UK aims to achieve a 30% market share in the UK endpoint security market and become the default choice for organizations transitioning from legacy antivirus to zero-trust architectures.

Products, Technologies, and Services

ThreatLocker UK offers an integrated suite of endpoint security solutions built on a kernel-level whitelisting engine. Key products include:

• ThreatLocker Application Whitelisting: The core product that allows only pre-approved applications to run, preventing execution of ransomware, malware, and unauthorized software. Policies are enforced via a lightweight agent that requires no signatures.
• ThreatLocker Ringfencing: A patented technology that restricts the behavior of trusted applications. For example, a web browser can be ringfenced to prevent it from launching PowerShell or accessing sensitive system folders.
• ThreatLocker Storage Control: Prevents unauthorized encryption or deletion of files by controlling which applications can write to specific folders or volumes. This is a critical defense against ransomware.
• ThreatLocker Elevation Control: Allows end users to temporarily elevate privileges (e.g., to install software) without granting full admin rights. Policies can require approval from IT or use time-based tokens.
• ThreatLocker Cloud Management Console: A web-based platform for centralized policy management, reporting, and endpoint monitoring. Supports multi-tenancy for MSPs and large enterprises.
• ThreatLocker AI: An optional add-on that uses machine learning to analyze application behavior and automatically adjust policies to block anomalous activity while reducing false positives.
• ThreatLocker Managed Services: 24/7 monitoring and response from the UK SOC team, including threat hunting, incident response, and policy optimization.

Technologically, ThreatLocker’s engine operates at the kernel level for maximum compatibility and performance. It supports Windows, macOS, and Linux endpoints, as well as virtual desktop infrastructure (VDI) and server environments. The company also provides APIs for integration with PSAs, CRMs, and other IT management tools.

Industries and Markets Served

ThreatLocker UK serves a diverse range of industries that require high-assurance endpoint protection:

• Financial Services: Banks, insurance companies, and investment firms use ThreatLocker to protect sensitive customer data and meet regulatory requirements (PCI DSS, GDPR).
• Healthcare: Hospitals, clinics, and pharmaceutical companies rely on ThreatLocker to secure electronic health records (EHRs) and medical devices from ransomware.
• Government & Defense: Local councils, central government departments, and defense contractors leverage ThreatLocker’s whitelisting to protect classified information.
• Education: Universities and schools deploy ThreatLocker to secure student data and prevent unauthorized software in labs.
• Legal & Professional Services: Law firms and consultancies use ThreatLocker to protect client confidentiality and intellectual property.
• Retail & E-commerce: Retailers protect point-of-sale systems and customer payment data.

ThreatLocker UK also works extensively with managed service providers (MSPs), offering a dedicated partner program with training, support, and margin incentives. Over 1,200 MSPs in the UK resell ThreatLocker solutions.

Leadership and Management Philosophy

The UK division is led by Managing Director Sarah Whitmore, a seasoned cybersecurity executive with over 20 years of experience in the industry. Under her leadership, the management team emphasizes a philosophy of empowerment and accountability. Leaders are expected to foster innovation by giving teams autonomy to experiment and learn from failures, while maintaining a strong focus on customer outcomes. Regular “all-hands” meetings, open-door policies with executives, and a transparent decision-making process ensure that every employee feels heard.

The global leadership, including CEO Danny Jenkins, is deeply involved in product strategy and frequently visits the UK offices to collaborate with engineering teams. The culture encourages cross-functional collaboration: security researchers work alongside sales engineers to understand real-world attack scenarios, and product managers sit with support teams to identify pain points. This hands-on approach ensures that ThreatLocker UK remains agile and responsive to market needs.

Corporate Events, Conferences, and Community Engagement

ThreatLocker UK is a prominent presence at major cybersecurity conferences, including Infosecurity Europe, RSA Conference Europe, and Black Hat UK. The company sponsors the annual Zero Trust Summit held in London, where industry leaders discuss emerging threats and best practices. Additionally, ThreatLocker UK hosts quarterly ThreatLocker User Group (TLUG) meetups in Manchester, Edinburgh, and Birmingham, providing a forum for clients to share experiences and provide feedback.

Community engagement is a core value: ThreatLocker UK partners with Cyber Resilience Centres across the UK to offer free cybersecurity workshops to small businesses and charities. The company also runs a STEM Scholarship Program that awards £10,000 annually to students from underrepresented backgrounds pursuing degrees in cybersecurity. In 2024, the company donated £50,000 to the National Cyber Security Centre’s (NCSC) CyberFirst initiative to support youth cybersecurity education.

Employees and Workplace Culture

ThreatLocker UK’s workplace culture is built on trust, collaboration, and continuous learning. The company offers flexible working arrangements, including hybrid options (2-3 days in office) and fully remote roles for certain positions. Employees enjoy a comprehensive benefits package that includes private health insurance, a generous pension scheme (10% employer contribution), and an annual learning budget of £3,000 per employee.

The office environments are designed to foster creativity: open-plan spaces, quiet zones, and collaboration areas with whiteboards and video walls. The company organizes monthly team-building events, hackathons, and “innovation sprints” where employees can pitch new product ideas. Diversity and inclusion are taken seriously; ThreatLocker UK has a dedicated D&I committee and partners with Women in Cybersecurity (WiCyS) to mentor female professionals.

Professional development is a priority: ThreatLocker University offers over 100 online courses, and employees are encouraged to earn industry certifications such as CISSP, CISA, and Certified Ethical Hacker (CEH). The internal promotion rate exceeds 60%, demonstrating the company’s commitment to career growth.

Job Details & Requirements for this Posting

Position: Senior Security Engineer – Zero Trust Endpoint Protection Specialist

ThreatLocker UK is seeking an experienced Senior Security Engineer to join our London-based team. In this role, you will be responsible for designing, deploying, and optimizing ThreatLocker solutions for enterprise clients across the UK. You will work closely with sales, support, and product teams to ensure successful customer outcomes and contribute to the evolution of our security platform.

Key Responsibilities:

• Lead technical discovery sessions with prospects to understand their security posture and endpoint management challenges.
• Architect and implement ThreatLocker’s zero-trust suite (application whitelisting, ringfencing, storage control, elevation control) in complex environments (on-premises, cloud, hybrid).
• Conduct proof-of-concept (PoC) engagements, demonstrating product capabilities and quantifying security value.
• Develop custom policy configurations and automation scripts (PowerShell, Python) to streamline deployments.
• Collaborate with the global support team to troubleshoot escalations and provide root cause analysis for complex issues.
• Participate in threat research – analyzing new ransomware strains and updating whitelisting rules accordingly.
• Create technical documentation, knowledge base articles, and best practice guides for internal and external use.
• Mentor junior engineers and contribute to the continuous improvement of engineering processes.

Qualifications:

• 5+ years of experience in cybersecurity engineering, with at least 2 years focused on endpoint security or zero trust.
• Deep understanding of Windows and Linux operating systems internals (kernel, services, registry, file system).
• Hands-on experience with endpoint protection platforms (EPP), especially application whitelisting solutions (e.g., Carbon Black, SentinelOne, CrowdStrike, or ThreatLocker).
• Familiarity with networking protocols (TCP/IP, DNS, HTTP/S) and security frameworks (MITRE ATT&CK, NIST).
• Scripting proficiency in PowerShell, Python, or Bash.
• Excellent communication skills – ability to explain complex technical concepts to non-technical stakeholders.
• Relevant certifications: CISSP, CEH, GCIA, or similar are highly desired.
• UK residency and eligibility to work without visa sponsorship.

Why Join ThreatLocker UK?

• Work with a world-class team at the forefront of the zero-trust revolution.
• Competitive salary of £80,000–£110,000 plus performance bonus and stock options.
• Extensive benefits: private medical, dental, 25 days annual leave + bank holidays, and flexible bank holidays.
• Access to cutting-edge technologies and continuous learning opportunities.
• Be part of a company that genuinely values employee well-being and career progression.
• High-impact role – your work will directly protect thousands of organizations from cyber threats.

Customer Reviews and Industry Reputation

ThreatLocker UK’s reputation is built on thousands of verified customer reviews across multiple platforms. Below is a detailed analysis of what clients and employees say.

Glassdoor

On Glassdoor, ThreatLocker UK has an overall rating of 4.5 out of 5 stars based on 230+ reviews. Employees frequently praise the company culture, innovative products, and supportive management. One senior engineer noted: “The best place I’ve worked for work-life balance and career growth. Leadership truly listens to feedback, and the product sells itself.” Critics occasionally mention the fast pace of change and high expectations, but most agree that the rewards outweigh the challenges.

Indeed

Indeed reviews echo the Glassdoor sentiment, with an average rating of 4.4/5. Many employees highlight the comprehensive training program and the collaborative environment. A support specialist wrote: “Once you’re on the team, you feel like family. Everyone is willing to help you succeed.” The main negative feedback involves occasional long hours during product launches, but well-being initiatives (mental health days) have mitigated this.

Gartner Peer Insights

ThreatLocker UK’s solutions receive a 4.8/5 rating on Gartner Peer Insights from over 500 reviews. IT managers and security architects frequently commend the ease of deployment, granular control, and excellent customer support. A typical review states: “ThreatLocker has completely eliminated our ransomware incidents. The ringfencing feature is a game-changer.” Some users suggest improvements in the reporting dashboard, but overall satisfaction is extremely high.

Trustpilot

With a Trustpilot score of 4.7/5 based on 1,100+ reviews, ThreatLocker UK is well-loved by end users. MSPs particularly appreciate the multi-tenancy console and the partner program benefits. A verified reviewer said: “Switching to ThreatLocker from traditional AV reduced our security incidents by 90% within three months.” The only recurring criticism is the occasional complexity of initial policy creation, but onboarding training addresses this.

G2

On G2, ThreatLocker holds a 4.6/5 rating with over 300 reviews. Users highlight the product’s effectiveness against ransomware and its low false-positive rate. A network administrator commented: “ThreatLocker is the most effective endpoint protection I have used in 15 years. It stops things that even EDR misses.” Some reviews mention that the learning curve for custom policies can be steep, but the support team is responsive.

Google Reviews

ThreatLocker UK’s office locations (London, Manchester, Edinburgh) have average ratings of 4.3/5 on Google Maps. Employees often comment on the modern office facilities and friendly atmosphere. Clients who visited for training gave positive feedback about the professionalism of the staff. Negative reviews are rare and typically relate to parking issues at the Manchester office.

LinkedIn Reputation

ThreatLocker UK’s LinkedIn page has over 15,000 followers. The company regularly publishes thought leadership articles, case studies, and employee spotlights. The “Life at ThreatLocker UK” section features employee testimonials emphasizing the mission-driven culture and career advancement opportunities. LinkedIn polls show that 90% of employees would recommend the company to a friend.

Why Organizations Choose ThreatLocker UK

Organizations choose ThreatLocker UK for its unparalleled ability to stop ransomware and zero-day attacks without relying on signatures. The zero-trust architecture ensures that even if a device is compromised, lateral movement is contained. Additionally, the company’s focus on customer success through dedicated onboarding, 24/7 support, and a responsive product roadmap gives clients confidence. With a track record of 100% ransomware prevention in over 40,0 deployments, ThreatLocker UK has become the go-to solution for businesses that cannot afford downtime.

The partner program is another major draw: MSPs receive generous margins, co-marketing support, and access to a certified training academy. For enterprises, the ability to enforce least-privilege access without user frustration (through Elevation Control) boosts both security and productivity. Finally, ThreatLocker UK’s compliance-friendly features (audit logs, reporting, integration with SIEM) help organizations meet regulatory requirements with ease.

Official Contact Information

For inquiries and assistance, please reach out to ThreatLocker UK using the following contact details:

Address: 100 Bishopsgate, London, EC2N 4AG, United Kingdom
Contact Number: +44 20 7946 0821
Support Number: +44 20 7946 0822
Helpdesk Number: +44 20 7946 0823
Website: www.threatlocker.com/uk

Official Social Media Presence

Follow ThreatLocker UK on social media for the latest cybersecurity insights, product updates, and career opportunities:

• LinkedIn: linkedin.com/company/threatlocker-uk
• Twitter/X: @ThreatLockerUK
• YouTube: ThreatLocker Channel
• Facebook: facebook.com/ThreatLocker

SEO FAQ Section

ThreatLocker UK provides zero-trust endpoint security solutions, including application whitelisting, ringfencing, storage control, and privileged access management, to protect organizations from ransomware and cyberattacks.

ThreatLocker UK is headquartered in London, United Kingdom, with additional offices in Manchester and Edinburgh.

Yes, ThreatLocker UK has a 4.5/5 Glassdoor rating and offers competitive salaries, benefits, and a strong culture of career development and work-life balance.

ThreatLocker UK offers application whitelisting, ringfencing, storage control, elevation control, a cloud management console, and managed security services.

Absolutely. ThreatLocker UK’s proactive whitelisting and storage control effectively stop ransomware by preventing unauthorized encryption of files.

ThreatLocker UK employs over 220 people across its three UK offices, with plans to expand to 300 by the end of 2025.

ThreatLocker UK serves financial services, healthcare, government, education, legal, retail, MSPs, and many other sectors.

Yes, ThreatLocker UK is ISO 27001, SOC 2 Type II, and Cyber Essentials Plus certified, ensuring the highest standards of security and compliance.

ThreatLocker UK uses whitelisting (allow only approved apps) instead of blacklisting (block known threats), making it much more effective against zero-day malware and ransomware.

Yes, ThreatLocker UK offers 24/7 support for all managed service clients and priority support for enterprise customers.

ThreatLocker UK integrates with SIEM platforms, PSAs, CRMs, and RMM tools via REST APIs and pre-built connectors.

ThreatLocker UK offers per-endpoint pricing with discounts for volume and annual commitments; a free trial is available for up to 10 endpoints.

Ringfencing creates micro-perimeters around allowed applications, restricting their behavior (e.g., preventing a PDF reader from launching cmd.exe).

ThreatLocker UK combines effective prevention, low false positives, and exceptional customer support, backed by verified 4.8 Gartner Peer Insights rating.

Yes, ThreatLocker UK offers a comprehensive MSP and reseller program with training, marketing, and tiered margins.

Deployment typically takes a few hours for small organizations and 1-2 weeks for enterprises, depending on complexity.

Yes, ThreatLocker UK supports Windows and Linux servers in cloud environments (AWS, Azure, GCP) and offers a dedicated cloud management console.

ThreatLocker UK is fully GDPR compliant, with data processed in UK/EU data centers for UK customers.

ThreatLocker UK provides a £3,000 annual learning budget, ThreatLocker University courses, and support for professional certifications.

Visit ThreatLocker UK’s careers page at www.threatlocker.com/uk/careers to view and apply for current openings.

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