The weaponization of AI is driving a paradigm shift in the cyber security industry from proactive to preemptive security: clients must now invest more intelligence and effort in understanding their vulnerabilities before their adversaries do (Open AI). The only way to achieve this is to simulate future attack scenarios at scale, and to run them in high fidelity digital replicas of production environments (Gartner/Forrester). SimSpace serves as the AI Proving Grounds to generate hypersynthetic data which pressure tests controls, tools, teams, and agentic capabilities in full kill chain attacks hidden in realistic environmental traffic and patterns of life.

Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform was initially conceived to assist in Offensive Cyber Operations (OCO), to quickly replicate target environments to conduct mission rehearsal of human operators and their tools to deny (disrupt, degrade, destroy) or deceive (manipulate or exfiltrate data) adversaries. The company has since expanded to serve over a dozen allied governments in OCO/DCO as well as critical infrastructure enterprises around the world. The company is actively investing in the Americas, Asia Pacific, Europe and the Middle East through direct sales and channel partners. SimSpace has launched the AI Proving Grounds Consortium, leading the revolution by creating an open platform for the InfoSec ecosystem to train, validate and operationalize their agentic capabilities before committing to production.

Why join SimSpace?

We are a team united by a shared purpose and four core values: Serve to Protect, Acquire Understanding, Teamwork without Borders, and Operate as Innovators. We value candid, constructive feedback and create opportunities for personal, professional, and financial growth. Our vision, “Defend the Free World,” drives our mission: “Defeat Any Adversary in Any Cyber Terrain at Machine Speed.”

How Do We Work?

We listen to customers and colleagues, challenge assumptions, and turn ideas into meaningful results. We expect everyone to embrace emerging technologies, simplify and automate work, and use AI to learn, solve problems, and help deliver quality with speed. We apply human judgment and take responsibility for outcomes. Whether remote or office-based, we collaborate across teams and time zones.

We invite you to apply today!

About the Role

SimSpace builds the environments where the world's leading organizations train, test, and operationalize their cyber capabilities with confidence. We want the engineering teams behind that platform to set the standard for building software in the age of AI, not catch up to it.

As a Senior Software Engineering Manager, you'll lead and grow one of our engineering teams, make spec-driven development and AI-native workflows the way it builds software, and take charge of initiatives that reach well beyond it. You'll be accountable for the health of your team, the quality of what it ships, and the careers of the engineers who build it. You'll also keep your director, the leadership team, and cross-org partners clear on how effectively the team is delivering.

This is a people-leadership role with deep technical grounding. You lead through your team while staying close enough to the work to unblock hard problems and make smart trade-offs. We're looking for a high-agency engineering leader who doesn't just lead a team but leads initiatives—someone who takes charge, drives things forward, and never waits to be told how.

What You'll Do

Lead and Grow Your Team

Lead, grow, and develop a team of engineers; own hiring, onboarding, 1:1s, performance, and career growth.

Invest in your engineers as people—coaching, mentoring, and creating the conditions for them to do the best work of their careers.

Set the team's direction, goals, and priorities, translating product strategy into a clear plan and predictable execution.

Partner with your team's technical leaders as true counterparts—they own day-to-day technical direction, freeing you to focus on team health and org-wide initiatives.