Senior Microsoft Infra Engineer - TS/SCI Cleared

Amentum company; McLean (VA); On-site; USD 140,000 - 160,000; Full time

Benefits offered by this job

Health Insurance

401(k) Matching

Paid Time Off

Educational reimbursement

Parental leave

Employee stock purchase plan

Job summary

Amentum seeks a Senior Systems/Infrastructure Engineer to join our team supporting a McLean, Virginia customer. The role focuses on Microsoft-based infrastructure, including SQL Server, Exchange, AD, backups, and Cisco networking, with senior-level design, implementation, and troubleshooting responsibilities. The candidate must hold a TS/SCI with Polygraph clearance and U.S.

citizenship. The position involves leading, mentoring, and coordinating across cybersecurity, networking, database,

Qualifications

• 10+ years of enterprise IT infrastructure experience
• 7+ years of systems engineering in a Microsoft enterprise environment
• Must possess TS/SCI with Polygraph clearance (U.S. citizenship required)

Responsibilities

• Designing, implementing, maintaining, and supporting enterprise Microsoft infrastructure.
• Administering and troubleshooting Active Directory, Exchange, SQL Server, backup platforms, and Cisco network infrastructure.
• Creating secure baselines and maintaining compliance through assessments, auditing, and monitoring.
• Documentation generation for processes and system artifacts.
• Managing enterprise patching and maintenance and supporting vulnerability remediation (POA&Ms) and risk reduction.
• Supporting disaster recovery and business continuity planning through backups and restores.
• Mentoring junior administrators and acting as senior escalation resource.
• Coordinating with cybersecurity, networking, database, server, and management teams.
• Ensuring infrastructure remains secure, available, documented, and compliant.

Skills

Microsoft infrastructure

Active Directory

Microsoft Exchange

Microsoft SQL Server

Cisco networking

Enterprise backup & recovery

Cybersecurity & hardening

Virtualization

Tools

Hyper-V

VMware

WSUS

SCCM

Nessus

Job description

Amentum seeks a Senior Systems/Infrastructure Engineer to join our team supporting a McLean, Virginia customer. The role focuses on Microsoft-based infrastructure, including SQL Server, Exchange, AD, backups, and Cisco networking, with senior-level design, implementation, and troubleshooting responsibilities. The candidate must hold a TS/SCI with Polygraph clearance and U.S.

citizenship. The position involves leading, mentoring, and coordinating across cybersecurity, networking, database,