Cybersecurity Engineer

Who We AreThinkTek LLC is a fast-growing Certified SBA 8(a) and Service-Disabled Veteran-Owned Small Business (SDVOSB) specializing in management and technology consulting for Federal Government modernization. We provide tailored solutions in Program & Project Management, Strategic Planning, and IT Operations.Position DescriptionThinkTek is seeking a Senior Cybersecurity Engineer to support a Department of Defense client in the National Capital Region. This role will serve as the primary cybersecurity lead for the program, responsible for developing the Risk Management Framework (RMF) accreditation package and leading the development of the Commercial Solutions for Classified (CSfC) registration package for National Security Agency (NSA) approval. The ideal candidate combines disciplined RMF documentation expertise with applied technical knowledge of network engineering, CSfC, and mobility.ResponsibilitiesLead the development of RMF documentation required to support an Authority to Operate (ATO), including system security plans, security assessment artifacts, and supporting deliverablesLead the development of the CSfC registration package for submission to the NSA CSfC Program Management Office (CSfC PMO), including capability package compliance checklists, network diagrams, and supporting documentationEngage directly with the CSfC PMO to align on registration requirements and navigate guidance gaps where Capability Packages do not yet address emerging technologiesEnsure the system architecture and supporting documentation comply with applicable DoD cybersecurity directivesProduce technically accurate artifacts that withstand peer engineering review without significant reworkRequired QualificationsActive U.S. Department of Defense Top Secret security clearanceDoD 8140/8570 IAM Level II baseline certification (CISSP, CISM, CASP+, or equivalent)3+ years of experience developing RMF documentation and supporting ATO processes for DoD systemsDemonstrated understanding of network architecture, transport security, encryption, and identity managementFamiliarity with NIST SP 800-53, DoD Instruction 8510.01, and applicable DoD cybersecurity policiesExcellent written communication skills with the ability to produce clear, accurate technical documentationBachelor's degree in cybersecurity, computer science, information systems, or a related field; equivalent experience may substituteDesired QualificationsDirect experience developing CSfC registration packages and engaging with the NSA CSfC PMOFamiliarity with CSfC Capability Packages, particularly Mobile Access (MA), Campus Wireless LAN (WLAN), and related guidanceExperience supporting wireless and mobility programs in DoD environmentsMaster's degree in cybersecurity, information assurance, or related fieldActive TS/SCI eligibilityThinkTek LLC is proud to be an Equal Opportunity Employer (EOE), making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. ThinkTek offers medical, dental, and vision insurance to all full-time employees; PTO and a variety of other paid leave options are also available. You can read more about ThinkTek benefits at https://www.thinktekllc.com/careers/.