Secure our Nation, Ignite your Future Summary: Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first. At ManTech, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement. Currently, ManTech is seeking a motivated, career and customer-oriented Systems Engineer Assistant III to join our team in the El Segundo, CA. Description: The Systems Engineer Assistant III defines and contributes to solving any risk or implementation challenges impacting the ability to integrate, design, and engineer systems and software through a set of fully integrated models that are compliant with the current Department of Defense Architecture Framework (DoDAF). They perform tasks to interface with and support mission partners' systems engineering efforts to fulfill this requirement. They collaborate to integrate and synchronize development project hardware and software changes with interfacing systems and subsystems. They review and analyze research and analyses to identify options to increase interoperability and compatibility internally with mission partners' subsystems/components and externally with interfacing systems or within systems of systems by considering Modular Open Systems Approach (MOSA) techniques and methods. They collaborate with performance improvement professionals to ensure adoption of new operational concepts whenever systems are replaced, replenished, or augmented. They support the research and analysis efforts for emerging technologies from a standards, performance, and nonfunctional analysis perspective, including general product assessment, implementation planning, testing and evaluation, tuning, and key performance indicator (KPI) identification. They collect and define requirements and compare them to design documents as well as participate in technical reviews. They participate in integration efforts and work with users and peers in planning, developing, implementing, and supporting new or existing systems. The Systems Engineer Assistant III is a senior role with extensive experience in meeting challenges associated with software builds and deployments. The Systems Engineer Assistant III supervises, and mentors subordinate project and Team ManTech staff. Basic Qualifications: A minimum of five (5) years of systems engineering experience. Bachelor's degree in STEM or related discipline. (Can be substituted for a HS diploma with 13 years of experience or an Associate’s degree with 11 years of experience.) Preferred Qualifications: Master's degree in STEM or related discipline. International Council on Systems Engineering (INCOSE) Expert Systems Engineering Professional (ESEP) or Certified Systems Engineering Professional (CSEP) certifications. Clearance Requirements: The ability to obtain and maintain a TS/SCI Eligible clearance is required prior to starting this position. Must be a US Citizen. Physical Requirements: The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations. For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services. If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information. Why ManTech? This is why! When you apply for a job at ManTech, you are taking the first step toward a new adventure. Trailblazing technology, incredible professional development and the opportunity to serve our nation. All while Securing the Future®. ManTech provides mission-focused technology solutions and services for U.S. defense, intelligence and federal civilian agencies. In business for more than 52 years, we excel in full-spectrum cyber, data collection & analytics, enterprise IT, and systems and software engineering solutions that support national and homeland security. More than 9,300 talented professionals around the globe make up the ManTech family and nearly half are veterans. As a ManTech employee, you will work for a winning team alongside colleagues that support and inspire you. You will also have access to tuition assistance, partnerships with universities and institutions, professional groups that comprise our Communities of Practice, community service opportunities, Technical Recognition Awards, Career Enablement/Mobility programs and so much more. What are you waiting for? Click “Apply” and start your adventure today.