Senior Executive Assistant

MZLA Technologies Corporation (MZLA) is a wholly owned, for-profit subsidiary of the Mozilla Foundation and home to Thunderbird, our flagship open-source email and productivity platform empowering more than 20 million people around the world. While part of the Mozilla portfolio of companies, MZLA operates independently in both identity and organizational structure from the Mozilla Foundation and Mozilla Corporation.

Everything we build at MZLA is open source, developed transparently and in collaboration with a global community of contributors. This open approach shapes not only our products but also how we work: collaboratively, inclusively, and with a shared commitment to building technology that puts users first. We believe privacy and productivity should coexist, and that people deserve powerful digital tools without surrendering control of their data.

MZLA is a small but growing team of 50+ people distributed across seven countries. As we evolve Thunderbird from a single application into a suite of privacy-respecting productivity tools, we’re introducing new products and services that remain independent of big tech ecosystems. Our unique revenue model combines community donations that keep Thunderbird freely available with subscriptions for new cloud-based services, allowing us to grow and innovate while remaining independent and true to our values.

To learn more, visit www.thunderbird.net

The Opportunity

As a Senior Executive Assistant, you will provide high-level, proactive support to the CEO and COO, anticipating needs, prioritizing effectively, and extending the impact and efficiency of executive leadership across MZLA. This role sits at the center of executive operations, acting as a connective layer across priorities, people, and information to ensure complex initiatives move forward with clarity and momentum.

As the sole Executive Assistant in the organization, you will play a critical role in enabling smooth, coordinated operations while representing executive leadership both internally and externally. You will partner closely with HR, Finance, Legal, the Board, and cross-functional teams across a global, remote-first environment. In addition to managing executive scheduling and logistics, you will support projects, prepare materials and briefings, coordinate governance activities, and drive follow-through on key initiatives.

This role is ideal for someone who thrives in a fast-paced, dynamic organization and brings diplomacy, composure, strong judgment, and a solutions-oriented mindset. You are highly organized, an effective listener and communicator, and comfortable navigating complex or sensitive situations with professionalism and discretion. Above all, you take pride in helping leaders and organizations operate at their highest level of effectiveness.

This is a full-time, remote position working with colleagues across multiple regions and time zones. The role requires consistent overlap with Eastern and Central Time working hours, and we strongly prefer candidates located in or aligned with those time zones.

What you’ll do: 

• Act as a connective layer across executive priorities, teams, and information, helping ensure initiatives move forward with clarity, alignment, and follow-through.
• Own and manage complex administrative and operational support, including executive calendar strategy, multi–time zone scheduling, domestic and international travel coordination, expense reporting, and executive logistics.
• Manage and optimize information flow between executive leadership, their teams, external partners, and across the broader Mozilla ecosystem, ensuring communication is clear, timely, professional, and aligned with executive priorities.
• Balance and prioritize the competing demands of two Managing Directors, proactively managing trade-offs, sequencing priorities, and ensuring alignment across executive schedules and commitments.
• Support complex, cross-functional initiatives through project coordination, research, preparation of briefs and materials, and tracking action items.
• Lead end-to-end planning and coordination of Board, senior leadership, and other key meetings, including materials preparation, logistics, follow-up, and action tracking to ensure a professional and well-executed experience.
• Work closely with Legal, HR, Finance, and other partners to support governance, planning, onboarding, and organizational coordination.
• Handle highly sensitive and confidential information with discretion, sound judgment, and professionalism.
• Support planning and logistics for offsites, work weeks, and other key gatherings.
• Build strong, trust-based relationships across the organization to support collaboration and execution.

What you’ll bring: 

• 8-10+ years of experience providing senior-level executive support in a technology or multi-location organization, supporting one or more senior executives and operating with a high degree of autonomy.
• Experience supporting Board and senior leadership meetings, including end-to-end coordination.
• A demonstrated ability to anticipate needs, take initiative, and operate independently with sound judgment.
• Exceptional organizational skills and attention to detail, with the ability to manage competing and shifting priorities.
• Proven ability to steward highly sensitive and confidential information with discretion, professionalism, and integrity.
• Strong written and verbal communication skills, including experience preparing or editing materials, summaries, or briefing documents for senior stakeholders.
• Expertise with Google Workspace and collaboration tools, with a mindset toward improving efficiency and processes.
• Comfort working in a remote, asynchronous, globally distributed environment across multiple time zones.
• Experience supporting global teams, with awareness of different cultural working styles.
• Adaptability and resilience in a fast-paced environment, with a thoughtful, solutions-oriented approach.

Bonus points for

• Demonstrated understanding of, or interest in, working within an organization that prioritizes user privacy, trust, and responsible data stewardship.
• Multilingual skills are an asset in supporting a global organization.

Work Environment

You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. 

This is a remote full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines.

What you’ll get

We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are:

• US: $85,000 - $110,000 annually

We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience.

In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self, outlined below. 

Work & Career

• Fully remote work & schedule flexibility
• Latest Laptop 
• Discretionary Annual Bonus Program
• Monthly Remote Work Stipend
• Annual Professional Development Stipend
• Access to Udemy Learning Platform
• Industry Conferences
• Company All Hands

Rest & Play

• 24 days PTO per year (prorated) 
• Your Birthday
• Year-end Company Shutdown
• 9 Wellbeing Days
• Public Holidays
• Other Paid Leave
• Quarterly Wellbeing Stipend for Personal / Family Activities

Health & Family

• 401(k) Pension Contributions
• Health, Dental, & Vision Insurance
• Disability Insurance
• Life Insurance
• Employee Assistance Program 
• Paid Parental Leave
• Paid Sick Days 

Work Eligibility

Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship.

How to Apply

Please apply directly through our career page. We carefully review every cover letter and screening question, so take the time to answer each fully. We also value authenticity. We want to hear your perspective, not a bot’s. It's fine to use AI to polish your writing, but not to write your answers. Candidates who submit unoriginal AI generated answers will be disqualified from further screening. 

MZLA Technologies Corporation (MZLA) Commitment to diversity, equity and inclusion

MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. 

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccomodations@thunderbird.net to request accommodation.