IT Security Engineer

Location: Washington, DC 20024
Work Arrangement: Hybrid Only local candidates from the DMV region will be considered (2-3/week)
Submission Deadline: No new submittals after December 26, 2025
Work authorization: US Citizen
Position Overview The IT Security Engineer will serve as a senior technical resource responsible for the design, implementation, security, and ongoing administration of enterprise Active Directory (AD) and identity management solutions. This role requires deep expertise in Microsoft Active Directory, Group Policy, identity synchronization, and security architecture to ensure a secure, reliable, and compliant directory services environment. The engineer will lead large-scale AD initiatives, support security and compliance requirements, and collaborate closely with system administrators, service managers, and business stakeholders. Duties and Responsibilities

• Design, implement, and maintain enterprise Active Directory and identity management solutions.
• Plan, support, and lead directory synchronization systems for Microsoft Active Directory and Windows-based environments.
• Configure and manage Active Directory server roles, including Certificate Authorities (CA), IIS, File/Print Services, and DNS.
• Analyze, design, and implement Active Directory security solutions, including capacity planning and permissions management.
• Configure, analyze, and troubleshoot Group Policy Objects (GPOs), including item-level targeting and workstation/browser configurations.
• Utilize PowerShell scripting and LDAP queries to modify AD attributes and automate administrative tasks.
• Perform analysis of existing Active Directory environments to identify technical and operational challenges and recommend improvements.
• Serve as the primary coordinator for Active Directory migration and integration activities.
• Oversee and maintain the security, reliability, and integrity of the corporate Active Directory forest and schema.
• Support regulatory and compliance requests by providing data from Active Directory and related systems.
• Lead technical evaluations to assess infrastructure impacts, including redundancy and capacity requirements.
• Interact regularly with system administrators, service managers, and operational teams to design, test, and deploy security and automation solutions.
• Develop and maintain process documentation governing installation, configuration, administration, and maintenance of identity and authorization services.
• Create training manuals and presentation materials using Microsoft Office tools.
• Troubleshoot and resolve issues impacting production messaging and identity environments.
  

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• Minimum of 10 years of hands-on experience administering and engineering Microsoft Active Directory environments.
• Strong expertise with:
• Active Directory attributes, LDAP queries, and Kerberos authentication
• PowerShell scripting and automation (VBScript or PowerShell)
• Group Policy analysis, configuration, and troubleshooting
• AD Sites, replication topology, and native AD troubleshooting tools
• In-depth knowledge of native Microsoft built-in groups, permissions, and security policies.
• Experience integrating applications with Active Directory for authentication and authorization.
• Proven ability to independently lead large-scale Active Directory and identity management projects.
• Strong analytical, documentation, and problem-solving skills.
• Exceptional verbal and written communication skills, with the ability to work closely with technical and non-technical stakeholders.
  

Preferred Qualifications

• MCSE certification
• ITIL v4 certification
• Familiarity with VMView and applications integrated with Active Directory
  

About The Company
Headquartered in Leesburg, Virginia, Zenius Corporation is a HUBZone-certified small business. Zenius specializes in providing Grants Management, IT Modernization, Acquisition Management, and Financial Management services to Federal agencies. Zenius is selected by Inc 5000 as one of the fastest-growing companies in the DC Metro Area, awarded in 2025, 2024, 2021, and 2020. Zenius is also listed by Financial Times as one of the fastest-growing companies in the Americas in 2021. Zenius is an awardee of 2019 Best of Leesburg winner (Business Management Consultant category).
Benefits
Zenius Corporation is an employee-oriented company. Join us now and help us grow!
We offer a competitive benefits package that includes paid holidays and paid time off, medical insurance including health, vision, dental insurance, 401K matching, Flexible Spending Account and flexible schedules, as per business needs. We also work with our employees on training and professional certification plans that benefit the employee.
Equal Opportunity Employer
Zenius Corporation provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state, and local laws. Zenius complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including, but not limited to, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.
Zenius Corporation expressly prohibits any form of unlawful employee harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status.