SimSpace

• Lead and grow a rapidly expanding engineering organization through Engineering Managers, hiring exceptional talent while building a culture of technical excellence, ownership, and continuous improvement. • Develop Engineering Managers into organizational leaders who think beyond individual teams and optimize for company-wide outcomes. • Build an engineering culture that values customer impact, predictable delivery, software quality, and operational excellence. • Foster a customer-first mindset where internal product and engineering teams are treated as customers. • Build reusable, well-designed capabilities that are easy to adopt, well documented, and enable other teams to deliver differentiated customer experiences faster. • Drive a culture that values platform usability, developer experience, automation, and long-term engineering leverage alongside technical sophistication. • Partner closely with Product Management to translate long-term product vision into engineering strategy and execution. • Build strong partnerships across Engineering, Product, UX, Cyber Subject Matter Experts, Customer Success, Sales, and Marketing to align priorities and deliver coordinated outcomes. • Guide the engineering strategy behind capabilities including attack simulation, user activity, enterprise networking, operating systems, cloud services, SaaS applications, environmental automation, and AI-assisted environment generation. • Partner with Staff and Principal Engineers to define architecture, engineering standards, and technical direction while balancing long-term platform investments with pragmatic delivery. • Ensure Environmental Realism continues to evolve toward increasingly realistic enterprise behavior for both human operators and autonomous AI agents.

• Own the vision, strategy, and roadmap for one of SimSpace's most strategic product portfolios. • Determine how Environmental Realism evolves to support emerging AI-native security products, autonomous cyber agents, and increasingly sophisticated cyber operations. • Serve as the cross-functional leader for Environmental Realism, bringing together engineering, UX, cyber experts, range content teams, customer-facing organizations, and executive leadership around a common strategy. • Drive alignment, facilitate difficult prioritization decisions, and ensure multiple teams execute as a coordinated portfolio rather than independent initiatives. • Partner directly with cybersecurity companies, enterprise security organizations, government agencies, and internal cyber experts to guide the evolution of capabilities including attack simulation, user activity generation, and AI-assisted environment creation. • Represent SimSpace's Environmental Realism strategy with customers, analysts, and industry partners. Translate insights into product strategy and roadmap investments.

• Coordinate cyber range environments that allow customers to safely build, train, and evaluate AI agents against realistic adversary behaviors, enterprise network conditions, simulated telemetry, security tool outputs, and operational workflows• Support customers in training AI agents using realistic cyber scenarios, including attack progression, detection events, incident artifacts, forensic evidence, adversary TTPs, and SOC decision points• Collaborate with range engineers, AI engineers, detection engineers, threat emulation teams, and customer SOC teams to create repeatable AI agent test scenarios mapped to real-world threats and defensive objectives• Help customers compare AI agent performance against baseline human workflows, existing automation, playbooks, and security stack capabilities• Document AI agent test outcomes, gaps, risks, improvement opportunities, and recommended next steps in customer-ready reports and executive summaries• Develop repeatable AI agent validation playbooks, test plans, scoring rubrics, and after-action reporting templates for use across customer engagements• Support customers in progressing from prototype AI agent concepts to validated operational use cases that can be safely integrated into cyber defense workflows• Ensure customers can demonstrate that their AI agents are not only functional, but tested, trusted, monitored, and aligned to real-world cyber defense requirements• Lead the overall event and be responsible for the ultimate success• Interface with the customer to define goals, scope and schedule• Develop detailed event schedules, tasks and milestones• Work with customer to define requirements for network topology, defensive tool suite, and threat presentation• Scope level of effort and staffing with supporting Professional Services teams• Track all activities associated with the events planning, preparation, execution and reporting providing leadership updates on any areas of concern• Work with the customer event lead to manage all details• Lead all internal and customer-facing planning meetings• Lead the event execution and post-event administration• Structure and lead teams to deliver outstanding customer experiences and value• Build and maintain strong customer relationships; exceptional relationship-builder• Share in knowledge dissemination, reporting, and communications• Ability to work efficiently and flexibility to bring value to customers via the SimSpace platform and associated events• Build and maintain relationships with a wide array of people – junior and senior, and from diverse backgrounds

• Perform manual and exploratory testing across web applications, APIs, backend services, and end-to-end workflows to validate functionality and identify defects. • Create clear, organized test plans and detailed test cases that provide thorough coverage for new features, enhancements, and regression testing. • Identify edge cases, integration gaps, usability concerns, and failure scenarios by thinking critically about how systems behave under real-world conditions. • Write detailed, reproducible bug reports that enable engineering teams to quickly understand, prioritize, and resolve issues. • Reproduce, investigate, and help diagnose customer-reported issues by working closely with engineers to isolate root causes. • Collaborate with engineering teams early in the development process to improve feature testability and reduce quality risks before implementation. • Support release readiness by executing regression testing, validating fixes, and ensuring product quality prior to deployment. • Leverage modern testing tools, including AI-assisted workflows, to improve test design, increase coverage, and enhance overall testing efficiency.

• Design and implement core platform services in Kotlin, building the abstractions described above across diverse infrastructure targets. • Solve difficult integration challenges at the boundary between platform software and virtualization infrastructure. • Collaborate with Staff and Principal Engineers on architectural decisions. • Own features and components end-to-end — from design through implementation, testing, and production operation. • Support other engineering teams that depend on Core Services APIs and abstractions. • Identify and drive resolution of performance bottlenecks, reliability issues, and technical debt within the Core Services stack.

Title: Senior UX Designer II Location: Boston Department: User Experience Job Description: SimSpace serves as an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment. Trusted by allied governments, militaries, enterprises, and research institutions worldwide, SimSpace enables adaptive, AI-ready defenses that stay ahead of evolving threats. Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform unifies training, testing, and validation in a realistic, live-fire simulation—helping teams evaluate security investments, optimize performance, and compress cyber readiness cycles from months to days. Why join SimSpace? We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members, external clients, and their customers. How Do We Work? We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. That belief shows up in action: in-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development. Our people are empowered to shape their careers - and it shows. Year over year, SimSpace consistently outperforms industry benchmarks in internal mobility, promotions, and total rewards growth. Who Thrives Here? We are a team of innovators, protectors, and problem-solvers. We believe diversity of thought and experience fuels better solutions, and we’re committed to building teams that reflect the communities we serve. Whether you’re remote or office-based, you’ll collaborate with talented colleagues across departments and time zones, united by the mission to create a safer digital world. We invite you to apply today! SimSpace is seeking a Senior UX Designer II to help shape the future of our application suite. This person will reside in the Boston area, mainly work remotely and at times join the team for meetings in-person. This role is ideal for a designer who thrives in complex domains, enjoys turning ambiguity into clarity, and can confidently partner with Product Management and Engineering to define and deliver exceptional user experiences. Success in this role requires strong systems thinking, a customer-centered mindset, and the ability to balance rapid exploration with thoughtful execution. You'll work across challenging enterprise workflows, contribute to our evolving design system, and help drive usability and consistency throughout the application. What You'll Do - Partner closely with Product Managers and Engineers to discover, define, and deliver valuable customer solutions. - Translate complex workflows, systems, and technical concepts into intuitive and effective user experiences. - Use rapid, low-fidelity exploration techniques—including sketches, diagrams, workflows, and prototypes—to evaluate ideas, align stakeholders, and accelerate decision-making. - Design end-to-end experiences through information architecture, user flows, wireframes, prototypes, and high-fidelity designs. - Conduct user research, usability testing, and design validation activities to inform design decisions. - Independently lead UX initiatives and drive solutions for complex product challenges. - Apply established design patterns and contribute to the evolution of our design system to improve consistency, accessibility, and scalability. - Collaborate with fellow designers through critique, feedback, and shared problem-solving. - Present design work and rationale clearly to stakeholders, leadership, and cross-functional teams. - Leverage AI-powered tools and emerging technologies to accelerate research, ideation, design exploration, documentation, and execution. What Success Looks Like - You are comfortable working through ambiguity and helping teams find clarity. - You think in systems, workflows, and outcomes—not just screens. - You know when to leverage existing design patterns and when to evolve them. - You use lightweight artifacts to explore ideas quickly and drive alignment. - You build trusted partnerships with Product and Engineering and actively contribute to product direction. - You embrace AI as a practical tool for improving productivity, quality, and decision-making. - You care deeply about customer outcomes and continuously seek opportunities to improve the user experience. What We're Looking For Required - Experience designing complex enterprise software products. - Strong portfolio demonstrating systems thinking, workflow design, and problem-solving ability. - Experience working within established design systems and pattern libraries. - Ability to balance customer needs, business goals, technical constraints, accessibility requirements, and platform consistency. - Expertise with Figma and modern UX design and prototyping tools. - Experience conducting user research and validating design decisions through customer feedback. - Strong communication, facilitation, and stakeholder management skills. - Experience collaborating closely with Product Management and Engineering throughout the product development lifecycle. - Demonstrated ability to drive work independently and navigate ambiguity. - Experience using AI tools as part of everyday design, research, or problem-solving workflows. Preferred - Experience contributing to or evolving a design system. - Experience in cybersecurity, networking, infrastructure, developer tools, SaaS platforms, or other highly technical domains. - Familiarity with accessibility standards and inclusive design practices. - Degree in Design, Human-Computer Interaction, Human Factors, Psychology, or a related discipline. We’re proud to offer a competitive and comprehensive package designed to support your well-being, growth, and success: - Compensation. Base salary range: $155,000 - $220,000 reflecting our confidence in your expertise and impact, with the opportunity for bonuses tied to company performance and individual contributions. - Health & Wellness. Comprehensive medical, dental, and vision benefits, plus savings plans—coverage starts on day one! - Mental Health Support. Access to company-paid counseling, coaching, and resources for you and your family through Spring Health. - Financial Well-Being. Plan for your future with a 401(k)-retirement savings plan featuring a company match. - Flexible Time Off. Take the time you need with unlimited vacation and dedicated health & wellness days. SimSpace provides flexible solutions to meet the diverse work-life needs of team members. - Parental Leave. Paid leave plans to support you and your loved ones during life’s most important moments. - Ownership Opportunities. Equity stock options at hire, with annual performance-based grants—become an invested stakeholder in our shared success. - Referral Rewards. Earn $1,500–$3,500 for every qualified hire through our employee referral program. - Peloton Interactive Wellness Program. Full- and partial- subsidized membership plans and equipment discounts to help you reach your personalized fitness goals. - Continuous Learning. Access a LinkedIn Learning membership to prioritize your personal and professional development. - Social Connections. Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community. - Extra Perks. Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life’s details. Join SimSpace and enjoy benefits that enhance your career, health, and happiness! SimSpace is an Equal Opportunity Employer: In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire. SimSpace is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients. Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications. However, no one ever meets 100% of the qualifications. SimSpace encourages you to break that statistic and to apply. We look forward to your application! We also consider qualified applicants regardless of criminal histories, in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, please contact careers@simspace.com. SimSpace does not accept unsolicited resumes from employment agencies. Actual compensation for the position is based on a variety of factors, including, but not limited to affordability, skills, qualifications and experience, and may vary from the range.

• Design and build the control plane API: the interface that range orchestration and scenario systems use to drive the internet simulation platform, with strong attention to idempotency, consistent error semantics, and the operational patterns that make a platform API pleasant to build on. • Own the event-driven orchestration layer that coordinates multi-step operations across the platform's subsystems, ensuring that standing up a new range, registering a persona, incorporating a SaaS application, or updating topology propagates correctly and completely across all components. • Build and maintain the platform's persistent storage layer, providing reliable, well-abstracted storage primitives for the services and subsystems that depend on it, across file, object, and container storage as requirements evolve. • Own the deployment model for the internet simulation platform itself: the Kubernetes operators or controllers that manage platform lifecycle, the upgrade and rollout strategy for a service that cannot afford downtime, and the configuration model for integrating new ranges. • Define and own the state model for the platform, what is authoritative where, how components recover from partial failures, and how the platform converges to a correct state after disruption. • Collaborate with the network simulation tech lead on the in-range proxy agent architecture, owning the infrastructure side of that interface: agent deployment, connectivity management, and the handoff model when an agent loses contact with the control plane. • Partner with the SRE team on the operational model for a new platform service, establishing runbooks, incident response procedures, and the observability instrumentation that makes the platform debuggable in production. • Contribute to cross-cutting concerns including configuration management, secrets handling, and the security posture of the control plane.

• Design, develop, and maintain core services for cybersecurity range simulation, focusing on scalability, performance, and fault tolerance. • Lead end-to-end technical projects, from requirements gathering and architecture design to deployment, while setting clear goals and priorities. • Mentor and support engineers on the team, promoting a collaborative culture and guiding them in coding best practices, testing, and architectural design. • Collaborate cross-functionally with Product Managers and UX Designers to translate requirements into technically sound, user-centered solutions. • Conduct code reviews and provide constructive feedback to ensure code quality, performance, and adherence to company standards. • Implement robust monitoring and alerting strategies to maintain high uptime and quick response to potential system issues. • Ensure services meet security and compliance standards by integrating appropriate controls into the development lifecycle. • Contribute to documentation that details technical architecture, system design, and best practices to ensure knowledge sharing and team alignment.

• Design and operate the Kubernetes-based deployment automation for the simulated service catalog, including deployment configuration for each service type, health monitoring, and lifecycle management. • Build and maintain content seeding pipelines that scrape, transform, and inject realistic content into simulated services — making a fake code repository look like it has years of commit history, or a fake news site look like it has been publishing for months. • Own the external DNS layer: configure and operate authoritative DNS for all simulated domains, ensure correct mail and sender authentication records are generated at domain provisioning time, and maintain consistency between DNS state and deployed services. • Build and maintain the email delivery infrastructure that allows the internet simulation platform to send mail into range environments, including correct envelope construction, authentication headers, and support for adversarial email scenarios. • Collaborate with the identity and persona team to ensure simulated services are correctly provisioned with user accounts at persona registration time and that per-service user state remains consistent with the broader persona definition. • Instrument and monitor the simulated service catalog, building observability into service health and range-level activity using the platform's Grafana-based stack. • Contribute to the service API layer that allows other platform components and external orchestration systems to create and manage simulated services programmatically.

• Participate in the full development lifecycle, from definition to maintenance. • Collaborate with UX, Product, and Data Science teams. • Engage in team planning, demos, and retrospectives. • Continuously contribute to knowledge sharing and mentorship. • Solve complex problems and build solutions through collaborative methods. • Focus on the iterative delivery of high-quality code, along with tests and documentation.