Senior Microsoft Cloud Security Engineer

CACI International Inc; Arlington (VA); On-site; USD 132,000 - 290,000; Full time

Job summary

CACI International Inc in Arlington, VA seeks a Senior Microsoft Cloud Security Engineer to lead security across Azure, Entra, Defender, Purview, and Microsoft 365. You’ll partner with security engineers, cloud architects, identity teams, and incident responders to keep our tenant resilient and compliant.

Responsibilities include designing CA policies, optimizing Defender suites, implementing Purview, and crafting KQL queries for Sentinel. DHS EOD clearance ability is required or pursued.

Qualifications

• Must have advanced expertise in securing Microsoft cloud platforms (Azure, Entra, Defender, Purview, Office 365, Microsoft 365).
• Deep knowledge of CAPs, Azure AD/Entra, and Zero Trust principles.
• Proven track record with Defender ecosystem and Purview (DLP, labels, eDiscovery).
• Strong ability to write complex KQL queries for detection and response.
• Active MS/ cybersecurity certifications and time-management skills.

Responsibilities

• Secure the Microsoft cloud tenant and advise on architecture, design, and secure implementations.
• Lead development and enforcement of Conditional Access Policies for personas, groups and apps.
• Optimize Defender for Endpoint, Cloud, Identity, and Office 365 integrations.
• Implement Purview data classification, DLP, and eDiscovery workflows.
• Design and run KQL queries for Azure Sentinel and related services.
• Review security controls via assessments, tests, and red/blue engagements.
• Guide teams on governance, policy, and compliance best practices.

Skills

Zero Trust principles

Policy governance

Threat detection

Time management

Written communication

Education

Master's Degree

Bachelor’s degree

Tools

Azure

Entra

Defender

Purview

Office 365

Microsoft 365

KQL

Job description

Job Title: Senior Microsoft Cloud Security Engineer

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

* * *

The Opportunity:

CACI has an exciting position for a Senior Microsoft Cloud Security Engineer as we deploy, manage, and hardening our Microsoft cloud environment, including Azure, Office 365 and Microsoft 365. The Senior Microsoft Cloud Security Engineer should thrive on complexity, possess an analytical mindset, and bring deep expertise on managing and securing Microsoft's cloud platform. You’ll collaborate across teams, collaborating with security engineers, cloud architects, identity teams, and incident response analysts to ensure our tenant is resilient, compliant, and always mission ready.

Responsibilities:

• Serve as the go-to, subject matter expert (SME) for securing the Microsoft cloud tenant, advising on architecture, design, and implementation of secure solutions across Azure, O365, and M365.
• Lead the development and enforcement of Conditional Access Policies, aligned with best practices for managing access control for personas, groups, and applications.
• Act as the primary SME in optimizing the Microsoft Defender suite of components (Defender for Endpoint, Defender for Cloud, Defender for Identity, and Defender for Office 365)
• Implement Microsoft Purview, including data classification and sensitivity labels, Data Loss Prevent (DLP), and eDiscovery workflows.
• Design, run and optimize Kusto Query Language (KQL) queries for Azure Sentinel, Defender, and log analytics.
• Review and remediate security controls through vulnerability assessments, penetration tests, and red/blue team engagements.
• Guide cross-functional teams on security controls, compliance requirements, policy, and governance best practices

Qualifications:

Required:

• Ability to Obtain DHS EOD Public Trust Clearance
• Master's Degree + 10 years’ experience OR Bachelor’s degree + 13 years OR 19 years total experience
• Expert-level hands-on experience deploying, managing, and securing Azure, Entra, Defender, Purview, Office 365, and Microsoft 365 in large enterprises.
• Deep understanding of Conditional Access Policies (CAPs), Azure AD/Entra, and Zero Trust principles.
• Proven Track record implementing and managing the full suite of the Microsoft Defender ecosystem and Microsoft Purview (DLP, sensitivity labels, eDiscovery)
• Advanced proficiency writing KQL for detection, investigation, response, and reporting
• Active, expert-level certification such as Microsoft Certified Solutions Expert (MSCE), Microsoft 365 Admin Expert, Microsoft Cybersecurity Architect Expert, AZ-900, AZ-500, SC-900, SC-100, SC-200, SC-300, SC-400, SC-401
• Cybersecurity certifications: Security+
• Strong networking, firewall, VPN, and segmentation knowledge as it relates to cloud deployments
• Exceptional time management, written and communication skills.

Desired:

• CISSP, OSCP, GCIH

• ITIL, Agile, or PMP familiarity/certification

• Experience with SOAR platforms (e.g. Splunk, Microsoft Sentinel)

• Hands-on exposure to third-party cloud security tooling (CASBs, CNAAPs, SD-WANs)

• Previous consulting or client-facing delivery experience

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose - to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation’s most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy.

Pay Range

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$131,800 - $290,000

CACI is anEqualOpportunity Employer. All qualified applicants will receive consideraton for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any otherprotectedcharacteristic.