Systems Engineer III ? Tier 2 Cloud & Enterprise Services

NineFX is seeking an accomplished senior-level System Engineer to lead requirements development, enterprise architecture design, integration planning, and technical assessments for highly complex mission systems. This position serves as a key technical authority, ensuring system integrity and alignment throughout the entire lifecycle. You will collaborate directly with Government stakeholders, IPTs, and senior program leadership to guide architectural decisions and drive mission-ready solutions.

Ideal candidates bring deep systems engineering experience, strong cloud and Windows architecture expertise, and a proven ability to shape large-scale, multi-domain technical environments.

Key Responsibilities

Requirements, Architecture & Design

• Analyze user needs, CONOPS, and high-level architectures to develop complete, verifiable system and functional requirements
• Allocate requirements to hardware, software, facilities, and personnel components
• Develop system architectures, operational concepts, scenario threads, and alternative design approaches
• Implement DoDAF views and SOA-based solutions; conduct architecture trade studies using models and prototypes
• Define Information Assurance requirements including confidentiality, integrity, availability, authentication, and access control Integration, Verification & Validation
• Provide technical direction for integration, interfacing, engineering, and testing activities
• Ensure thorough definition and coordination of system interfaces across multiple teams
• Develop verification and validation methods and criteria; support early V&V planning
• Participate in requirements, design, program, and test reviews Configuration, Risk & Lifecycle Management
• Serve on the Configuration Control Board and maintain evolving configuration documentation
• Coordinate cross-discipline CCB actions and ensure technical integrity of system baselines
• Assess and manage risks using structured methods and EVM data; recommend mitigation strategies
• Develop system design alternatives considering lifecycle cost, scalability, complexity, and risk Compliance, Documentation & Standards
• Prepare and review SE artifacts such as SEPs, Requirements Specs, Interface Control Documents, and JCIDS documentation
• Support DoD/Government Certification & Accreditation processes
• Ensure compliance with applicable agency, national, and international standards
• Capture and maintain interface designs in accessible repositories Stakeholder Engagement & Leadership
• Provide senior technical leadership across engineering, integration, and development teams
• Work directly with Government stakeholders to resolve technical issues and shape system direction
• Support IPTs in capability development, feasibility studies, and operational planning
• Communicate clearly with executives, managers, and technical personnel Qualifications
• Active TS/SCI with Full Scope Polygraph (must already be held - no sponsorship)
• IAT Level II certification (Security+ CE, GSEC, CySA+, CCNA Security, or GICSP)
• Twenty (20) years of Systems Engineering experience supporting complex programs
• Proven experience planning and leading large scale systems engineering efforts
• Bachelor's degree in Systems Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related field o Five (5) additional years of SE experience may substitute for the degree
• Strong knowledge of cloud architectures (AWS or equivalent) and scalable cloud solution design
• Experience engineering physical and virtual VDI and VPN infrastructures
• Proficiency with network topology design for secure, reliable, high-performance environments
• Ability to evaluate mission needs and architect flexible, scalable technical solutions.

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