Halcyon

Full-stack Engineer

• Write multi-platform Rust code that transforms messages, processes data, communicates over IPC channels, and interfaces with components written in different languages including Web API integration.
• Handle core agent operations including data processing pipelines, inter-component communication, and system integration for endpoint agents across Windows and Linux platforms.
• Work with multi-platform logic in Rust while ensuring compatibility and optimal performance across different operating systems and architectures.
• Use logs, debuggers, and profiling tools to analyze performance, diagnose issues, and ensure correct behavior across all supported platforms.
• Write unit and integration tests, adhere to consistent coding style guidelines, and maintain overall product architecture and code quality.
• Communicate and collaborate effectively with other developers and teams to ensure component integration and interoperability across platforms.

Senior Engineer – Endpoint Agent

Account Executive

• Leverage existing SLED relationships to generate rapid pipeline and convert prospective clients with minimal ramp time.
• Be accountable to a defined set of pipeline metrics.
• Identify and engage potential clients, understanding their needs and presenting tailored solutions with an emphasis on outcomes.
• Articulate the value proposition of Halcyon’s solutions, presenting them in a compelling and relevant manner.
• Optimize client engagement post-sale, timing additional transactions appropriately.
• Cultivate and maintain strong relationships with existing clients, acting as a trusted advisor and understanding their evolving cybersecurity requirements.
• Conduct regular client reviews, assess satisfaction levels, and propose enhancements to further meet client objectives.
• Network via industry user groups, tabletop events and key industry conferences.
• Leverage strategic alliance partnerships to realize potential business opportunities and revenue growth.
• Facilitate continuous enablement, roadmap discussions, Quarterly Business Reviews (QBRs), and Executive Value Conversations (EVCs) to maximize client value and foster lasting partnerships.
• Negotiate contract terms, pricing and service agreements while ensuring alignment with both organizational and client objectives.
• Collaborate with internal stakeholders to optimize sales processes, streamline communications, and enhance overall client experience.

SLED Account Executive

Customer Success Manager

• Convert customer strategy and needs into a customer success plan and execute on the plan.
• Nurture customers on their Halcyon journey to discover the full value of the Halcyon platform and services.
• Foster customers through the onboarding process and provide guidance to achieve maximum adoption and usage of the platform.
• Proactively monitor and report on customer health.
• Maintain regular customer cadence and communication around adoption trends, sentiment, and opportunities.
• Act as the customer advocate and escalate issues as necessary to expedite solutions.
• Work closely with Halcyon Account Executives to identify upsell opportunities.
• Collaborate with cross-functional teams to further develop the customer relationship.
• Work independently and as part of a team.

Threat Intelligence Specialist

• Conduct proactive research on Monitor open-source, underground, technical data, and proprietary intelligence sources to track ransomware operations, leaks, and affiliate activity.
• Drive strategic and operational intelligence analysis of ransomware groups, including actor motivations, affiliate networks, victim targeting, and revenue models.
• Hunt for threat actor infrastructure, map evolving TTPs for high-impact ransomware families, and track shifts in tooling, access brokers, and extortion techniques.
• Produce high-impact finished intelligence and deliver briefings for a wide variety of audiences, including executives, information security personnel, customers, media, and the general public.
• Collaborate across security operations, incident response, and engineering teams to ensure effective integration of data and research into the Halcyon Anti-Ransomware Platform.
• Maintain working relationships with external partners, law enforcement, and intelligence-sharing alliances to support broader counter-ransomware efforts.
• Identify opportunities to degrade or disrupt ransomware operations through exposure, disruption, or legal/policy collaboration.

Ransomware Intelligence Analyst

Security Engineer

• Halcyon's goal is to deliver an anti-ransomware solution that breaks new ground in what a security product can achieve.
• Aligned with this mission, we're hiring a Product Security Manager to lead our product security efforts and ensure our defenses are robust, tested, and customer-ready. This role bridges technical security expertise with customer engagement and cross-functional coordination.
• Responsibilities include Security Leadership & Customer Engagement; Product Vulnerability Management & Coordination; Technical Oversight & Strategy; and driving security testing initiatives and remediation.

Product Security Manager

Solutions Engineer

• The Role: Combining business and security expertise, the Solutions Architect role will demonstrate the value of Halcyon’s cyber resilience solution to customers by advising, educating, and redefining the next generation of cybersecurity and recovery. This includes conducting ransomware readiness assessments and aligning customer expectations with the Halcyon cyber resilience solution.
• Responsibilities: Work with multiple stakeholders across the executive branch (CxO), as well as other relevant stakeholders to demonstrate the value of Halcyon’s solution.
• Responsibilities: Advise and educate customers and channel partners on the Halcyon platform and its capabilities.
• Responsibilities: Assist account and channel management to drive revenue and move opportunities throughout the sales cycle.
• Responsibilities: Interface and partner with customer success and threat intelligence liaisons to align customer expectations with Halcyon to ensure service delivery excellence and customer satisfaction.
• Responsibilities: Interface and partner with product management and engineering to align customer requests for features and functionality.
• Responsibilities: Attain quarterly and annual quota objectives, working in partnership with sales using Halcyon sales operating processes by adding value throughout the entire sales motion with such activities as:
• Facilitating new discussions by leveraging peer and industry network contacts.
• Telling the Halcyon story and detailing the value proposition.
• Performing requirements-analysis and qualification of opportunities.
• Coordinating and managing demonstrations and POV efforts, including endpoint testing, virtual environment lab configuration, and responding to customer questions.
• Seamlessly transitioning engagements for delivery to the customer success team.
• Staying current on industry trends.
• Maintaining advisory relationships with key stakeholders at customers by providing thought leadership, support, information, and guidance in conjunction with sales teams.
• Supporting marketing to build Halcyon brand awareness through speaking at corporate sponsored events, writing industry articles and leveraging social media to properly represent Halcyon.
• Actively pursuing personal development by maintaining and obtaining technical capabilities, soft skills and security specific knowledge through formal education, certification and other avenues.
• Perform additional duties as directed or needed.

Solutions Architect

Support Engineer

• The Role: Halcyon is seeking a highly skilled and experienced Senior Technical Support Engineer to join our growing support team. In this role, you will address customer issues across various platforms, including Windows, Linux, and Mac. The ideal candidate will possess a strong understanding of cloud, networking, applications, and security.
• You will collaborate closely with Halcyon’s Customer Success, Engineering, and Threat Response teams to troubleshoot and resolve customer issues and handle emerging threats, all while delivering top-notch support to our clients. If you are a self-motivated team player who is eager to learn and can adapt quickly, we encourage you to apply.
• Responsibilities:
• Serve as the highest level of technical escalation for critical customer issues.
• Perform advanced troubleshooting and in-depth analysis of Halcyon Agents across Windows, and Linux environments.
• Partner with Engineering teams to diagnose, reproduce, and resolve complex technical challenges.
• Conduct root cause analysis and provide actionable insights to improve product stability and performance.
• Develop and refine technical documentation and knowledge base articles to enhance internal and customer-facing support resources.
• Lead customer interactions with professionalism, ensuring timely and effective resolution of technical issues via phone, email, and remote sessions.
• Assist in refining support processes, mentoring junior engineers, and identifying areas for automation and efficiency improvements.
• Stay ahead of emerging threats and security trends to proactively assist customers in mitigating risks.
• Learn and develop new skills quickly as required.
• Perform other duties as assigned.

Senior Technical Support Engineer

• Leverage existing industry relationships within key verticals to generate rapid pipeline and convert prospective clients with minimal ramp time.
• Be accountable to a defined set of pipeline metrics.
• Identify and engage potential clients, understanding their needs and presenting tailored solutions with an emphasis on outcomes.
• Articulate the value proposition of Halcyon’s solutions, presenting them in a compelling and relevant manner.
• Optimize client engagement post-sale, timing additional transactions appropriately.
• Cultivate and maintain strong relationships with existing clients, acting as a trusted advisor and understanding their evolving cybersecurity requirements.
• Conduct regular client reviews, assess satisfaction levels, and propose enhancements to further meet client objectives.
• Network via industry user groups, tabletop events and key industry conferences.
• Leverage strategic alliance partnerships to realize potential business opportunities and revenue growth.
• Facilitate continuous enablement, roadmap discussions, Quarterly Business Reviews (QBRs), and Executive Value Conversations (EVCs) to maximize client value and foster lasting partnerships.
• Negotiate contract terms, pricing and service agreements while ensuring alignment with both organizational and client objectives.
• Collaborate with internal stakeholders to optimize sales processes, streamline communications, and enhance overall client experience.

Strategic Account Executive, North Central

• The Role: We are seeking an exceptional and results-driven Enterprise Account Executive, South Central to join our team and make an immediate impact. Our ideal candidate excels at early-stage companies and has influential relationships within the industry, leveraging their in-depth knowledge of the cybersecurity landscape and customer needs to drive outstanding results.
• Responsibilities: Leverage existing industry relationships within key verticals to generate rapid pipeline and convert prospective clients with minimal ramp time.
• Be accountable to a defined set of pipeline metrics.
• Identify and engage potential clients, understanding their needs and presenting tailored solutions with an emphasis on outcomes.
• Articulate the value proposition of Halcyon’s solutions, presenting them in a compelling and relevant manner.
• Optimize client engagement post-sale, timing additional transactions appropriately.
• Cultivate and maintain strong relationships with existing clients, acting as a trusted advisor and understanding their evolving cybersecurity requirements.
• Conduct regular client reviews, assess satisfaction levels, and propose enhancements to further meet client objectives.
• Network via industry user groups, tabletop events and key industry conferences.
• Leverage strategic alliance partnerships to realize potential business opportunities and revenue growth.
• Facilitate continuous enablement, roadmap discussions, Quarterly Business Reviews (QBRs), and Executive Value Conversations (EVCs) to maximize client value and foster lasting partnerships.
• Negotiate contract terms, pricing and service agreements while ensuring alignment with both organizational and client objectives.
• Collaborate with internal stakeholders to optimize sales processes, streamline communications, and enhance overall client experience.
• Skills and Qualifications:
• Demonstrated ability to drive revenue growth and meet or exceed sales targets.
• 5+ years of sales in the endpoint cybersecurity industry.
• Proven track record of 100%+ quota attainment.
• Skillful pipeline management and the ability to balance high-profile accounts with SMBs.
• Ability to qualify leads based on key success metrics.
• Ability to establish and maintain client and executive-level relationships, focusing on their success and long-term partnerships.
• Familiarity with channel ecosystem and leveraging value added resellers.
• Proficient in conducting and leading negotiations for procurement and legal agreements, showcasing expertise in driving favorable terms and agreements.
• Excellent verbal and written communication skills to convey complex concepts in a clear and compelling manner to clients.
• Willingness to travel up to 75%.

Enterprise Account Executive, South Central

• What we do: Halcyon is the industry’s first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware.
• Who we are: Halcyon was formed in 2021 by a team of cyber industry veterans after battling the scourge of ransomware (and advanced threats) for years at some of the largest global security vendors. Comprised of leaders from Cylance (now Blackberry), Accuvant (now Optiv), Fireye and ISS X-Force (now IBM), Halcyon is focused on building products and solutions for mid-market and enterprise customers.
• The Role: We are seeking an exceptional and results-driven Enterprise Account Executive, Southeast to join our team and make an immediate impact. Our ideal candidate excels at early-stage companies and has influential relationships within the industry, leveraging their in-depth knowledge of the cybersecurity landscape and customer needs to drive outstanding results.
• Responsibilities: Leverage existing industry relationships within key verticals to generate rapid pipeline and convert prospective clients with minimal ramp time.
• Be accountable to a defined set of pipeline metrics.
• Identify and engage potential clients, understanding their needs and presenting tailored solutions with an emphasis on outcomes.
• Articulate the value proposition of Halcyon’s solutions, presenting them in a compelling and relevant manner.
• Optimize client engagement post-sale, timing additional transactions appropriately.
• Cultivate and maintain strong relationships with existing clients, acting as a trusted advisor and understanding their evolving cybersecurity requirements.
• Conduct regular client reviews, assess satisfaction levels, and propose enhancements to further meet client objectives.
• Network via industry user groups, tabletop events and key industry conferences.
• Leverage strategic alliance partnerships to realize potential business opportunities and revenue growth.
• Facilitate continuous enablement, roadmap discussions, Quarterly Business Reviews (QBRs), and Executive Value Conversations (EVCs) to maximize client value and foster lasting partnerships.
• Negotiate contract terms, pricing and service agreements while ensuring alignment with both organizational and client objectives.
• Collaborate with internal stakeholders to optimize sales processes, streamline communications, and enhance overall client experience.
• Skills and Qualifications: Demonstrated ability to drive revenue growth and meet or exceed sales targets.
• 5+ years of sales in the endpoint cybersecurity industry.
• Proven track record of 100%+ quota attainment.
• Skillful pipeline management and the ability to balance high-profile accounts with SMBs.
• Ability to qualify leads based on key success metrics.
• Ability to establish and maintain client and executive-level relationships, focusing on their success and long-term partnerships.
• Familiarity with channel ecosystem and leveraging value added resellers.
• Proficient in conducting and leading negotiations for procurement and legal agreements, showcasing expertise in driving favorable terms and agreements.
• Excellent verbal and written communication skills to convey complex concepts in a clear and compelling manner to clients.
• Willingness to travel up to 75%.
• Benefits: Comprehensive healthcare (medical, dental, and vision) with premiums paid in full for employees and dependents.
• Short and long-term disability coverage, basic life and AD&amp;D insurance plans.
• Medical and dependent care FSA options.
• 401k plan with a generous employer contribution.
• Flexible PTO policy.
• Parental leave.
• Generous equity offering.

Enterprise Account Executive

Engineer

• What we do: Halcyon is the industry’s first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware.\n• Who we are: Halcyon was formed in 2021 by a team of cyber industry veterans after battling ransomware for years at some of the largest global security vendors. Comprised of leaders from Cylance (now Blackberry), Accuvant (now Optiv), Fireye and ISS X-Force (now IBM), Halcyon is focused on building products and solutions for mid-market and enterprise customers.\n• As a remote-native, completely distributed global team, we recognize great talent can exist anywhere. We invite you to apply to a job you’re interested in and we\'ll work a plan to meet your needs.\n• The Role: Halcyon is building the most resilient anti-ransomware platform on the market, and we need a Windows kernel expert at the forefront of our agent development. As a Principal Kernel Engineer, you will play a key role in the design and evolution of our Windows kernel components that prevent, detect, and respond to ransomware.\n• Responsibilities: Apply deep Windows kernel expertise to develop and optimize kernel-mode components that power Halcyon’s ransomware prevention and detection capabilities.\n• Contribute to the design and implementation of secure, high-performance Windows drivers (e.g., file system mini-filters, network callout drivers, process/thread monitoring).\n• Investigate, debug, and resolve complex kernel-level issues — from race conditions to memory corruption — using WinDbg, crash dump analysis, and advanced debugging techniques.\n• Help set technical direction for kernel development across the Windows agent, influencing architecture and performance trade-offs.\n• Mentor and guide other engineers in kernel-mode development best practices and secure coding patterns.\n• 15+ years of exclusive, professional Windows kernel development — deep understanding of NT internals, OS architecture, and low-level subsystems.\n• Proven track record of shipping multiple production-quality Windows drivers (file system, networking, or security-related) in commercial products.\n• Mastery of C++ in kernel-mode and user-mode, including multithreading, synchronization primitives, IRQL management, and lock-free programming.\n• Expert-level debugging skills — WinDbg, KD, crash dump analysis, race condition resolution.\n• Strong knowledge of Win32 APIs, kernel security boundaries, and performance tuning at the OS level.\n• Experience designing for stability, security, and performance.\n• Exceptional communication skills and ability to collaborate across engineering and product teams.\n• Experience with Rust in systems programming, or a strong desire and capacity to learn quickly.\n• Familiarity with Portable Executable (PE) format and reverse engineering tools.\n• Hands-on experience with Windows Mini-Filter drivers, Windows Filter Platform (WFP), or kernel-based process protection mechanisms.\n• Exposure to Rust/C++ interoperability in production systems.\n• Background in endpoint security, EDR, or other OS-level security products.