Senior Microsoft Cloud Security Engineer

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

Job summary

CACI seeks a Senior Microsoft Cloud Security Engineer to secure and optimize our Microsoft cloud tenant across Azure, Entra, Defender, Purview and Office 365 in a large enterprise environment.

You will lead policy development, implement advanced security controls, craft KQL queries for Sentinel, and collaborate with security, identity and incident response teams to ensure resilient, compliant operations.

Qualifications

• Ability to Obtain DHS EOD Public Trust Clearance.
• 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 Defender ecosystem and Microsoft Purview (DLP, sensitivity labels, eDiscovery).
• Advanced proficiency writing KQL for detection, investigation, response, and reporting.
• Active, expert-level certifications such as MSCE, Microsoft 365 Admin Expert, Cybersecurity Architect Expert, AZ-900/500/SC-900/100/200/300/400/401.
• Cybersecurity certifications: Security+.

Responsibilities

• Secure and optimize the Microsoft cloud tenant across Azure, Entra, Defender, Purview, and Office 365.
• Lead development and enforcement of Conditional Access Policies for various personas and applications.
• Optimize Defender for Endpoint, Defender for Cloud, Defender for Identity, and Defender for Office 365.
• Design and implement Microsoft Purview data classification, DLP, and eDiscovery workflows.
• Develop and run KQL queries for Azure Sentinel, Defender, and log analytics.
• Perform vulnerability assessments, penetration tests, and red/blue team engagements to remediate controls.
• Guide cross-functional teams on security controls, policies, and governance.

Skills

Public Trust Clearance

Zero Trust

KQL

Incident Response

Time Management

Written & Verbal Communication

Education

Master’s Degree

Bachelor’s degree

Tools

Microsoft Defender suite

Microsoft Purview

Azure AD/Entra

Office 365 / M365

Azure Sentinel

Kusto Query Language (KQL)

Job description

Job Title: Senior Microsoft Cloud Security EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: NoneEmployee Type: RegularPercentage of Travel Required: NoneType 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.
• Participate in rotating on‑call schedule across the team, to provide incident response or support during outages.

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 an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.