Mergers and Acquisitions Security Architect

Posting Description:

Are you a hardworking Mergers and Acquisition (M&A) Security Architect seeking a new opportunity? This could be an excellent opportunity to explore!

Aon is in the business of better decisions.

At Aon, we shape decisions for the better to protect and enrich the lives of people around the world!

As an organization, we are united through trust as one inclusive, diverse team, and we are passionate about helping our colleagues and clients succeed.

What the day will look like

The M&A Security Architect has responsibility for end‑to‑end cybersecurity due diligence, risk quantification, and security integration/separation architecture for mergers, acquisitions, divestitures, joint ventures, and strategic partnerships. This role partners with Corporate Development, Legal, IT, Privacy, Compliance, Security Architecture and Engineering, Cybersecurity Operations, and Integrated Risk Management to:

• Perform deep technical assessments of target environments
• Identify and quantify material cyber risks and control gaps
• Define desired and transitional security architectures
• Lead implementation of security controls aligned with Aon standards from the initial phase through the first month and up to the 100-day mark

The person in this role will be the primary technical authority for security across the deal lifecycle from initial diligence through integration or separation stabilization.

Job Responsibilities:

Pre‑Deal Cyber Due Diligence

• Lead end‑to‑end technical security assessments across identity, network, endpoint, cloud/SaaS, data, and application security
• Identify material risks
• Review security evidence and artifacts
• Assess security maturity against internal standards and leading frameworks
• Produce executive‑ready risk summaries, findings, and recommendations (including go/no‑go guidance and conditional close criteria)

Transaction Risk & Deal Support

• Translate technical findings into business and financial risk, including potential incident impact, operational disruption, regulatory/legal exposure, and reputational risk
• Support Contracting, Legal, and Corporate Development with security requirements for TSAs and separations
• Provide input on security and privacy clauses, minimum control baselines, representations and warranties, and remediation commitments
• Estimate remediation effort, cost, and time, and feed these into valuation models, risk reserves, and integration budgets

Integration & Separation Security Architecture

• Design target and interim security architectures across identity and access, network, endpoint, email/collaboration, cloud, logging/monitoring, and vulnerability/patch management
• Define secure integration and separation patterns for connectivity, identity consolidation/trust, tenant/organization alignment, and logging/SIEM/SOAR coverage
• Develop Day 1 / Day 30 / Day 100+ roadmaps that prioritize high‑impact controls and clearly distinguish pre‑close, Day 1‑ready, and post‑Day 1 activities
• Map controls to enterprise security standards and document gaps, exceptions, and compensating controls during transition

Skills and experience that will lead to success.

• 5 or more years of hands‑on expertise using security technologies within a mid to large size company.
• Strong risk‑based, pragmatic decision‑making
• Systems thinking and ability to make architecture trade‑offs under time and information constraints
• Ability to influence and negotiate outcomes across organizations without direct authority
• Comfort operating in ambiguity with incomplete data and high sensitivity of information
• Bias toward automation, standardization, and building reusable patterns
• Experience in Technology mergers and acquisitions/integrations is a plus.

How we support our colleagues

In addition to our comprehensive benefits package, we encourage an inclusive workforce. Plus, our agile environment allows you to manage your wellbeing and work/life balance, ensuring you can be your best self at Aon. Furthermore, all colleagues enjoy two “Global Wellbeing Days” each year, encouraging you to take time to focus on yourself. We offer a variety of working style solutions for our colleagues as well.

Our continuous learning culture inspires and equips you to learn, share and grow, helping you achieve your fullest potential. As a result, at Aon, you are more connected, more relevant, and more valued.

Aon values an innovative and inclusive workplace where all colleagues feel empowered to be their authentic selves. Aon is proud to be an equal opportunity workplace.

Aon provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, creed, sex, sexual orientation, gender identity, national origin, age, disability, veteran, marital, domestic partner status, or other legally protected status. People with criminal histories are encouraged to apply.

We are committed to providing equal employment opportunities and fostering an inclusive workplace. If you require accommodations during the application or interview process, please let us know. You can request accommodations by emailing us at [email protected] or your recruiter. We will work with you to meet your needs and ensure a fair and equitable experience.

For positions in San Francisco and Los Angeles, we will consider for employment qualified applicants with arrest and conviction record in accordance with local Fair Chance ordinances.

Aon is not accepting unsolicited resumes from search firms for this position. If you are a search firm, you will not be compensated in any way for your submission of a candidate, even if Aon hires that candidate.

Nothing in this job description restricts management's right to assign or reassign duties and responsibilities to this job at any time.

Pay Transparency Laws:

The salary range for this position (intended for U.S. applicants) is $130k- $140k annually. The actual salary will vary based on the applicant’s education, experience, skills, and abilities, as well as internal equity and alignment with market data. The salary may also be adjusted based on the applicant’s geographic location.

A summary of all the benefits offered for this position:

Aon offers a comprehensive package of benefits for full-time and regular part-time colleagues, including, but not limited to: a 401(k) savings plan with employer contributions; an employee stock purchase plan; consideration for long-term incentive awards at Aon’s discretion; medical, dental and vision insurance, various types of leaves of absence, paid time off, including 12 paid holidays throughout the calendar year, 15 days of paid vacation per year, paid sick leave as provided under state and local paid sick leave laws, short-term disability and optional long-term disability, health savings account, health care and dependent care reimbursement accounts, employee and dependent life insurance and supplemental life and AD&D insurance; optional personal insurance policies, adoption assistance, tuition assistance, commuter benefits, and an employee assistance program that includes free counseling sessions. Eligibility for benefits is governed by the applicable plan documents and policies.

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