Senior Administrative Assistant
Listed on 2026-02-19
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Administrative/Clerical
Office Administrator/ Coordinator, Virtual Assistant/ Remote Admin
Simpson Gumpertz & Heger
Position Title: Senior Administrative Assistant
Do you want to help engineer what's next?
Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients most complex challenges. We leverage our collective and diverse experience, technical expertise, and industry knowledge of structures and building enclosures, advanced analysis, performance & code consulting, and applied science & research to deliver unrivaled, comprehensive solutions that drive superior performance. With 750 employees in ten office locations throughout the United States, SGH’s industry‑leading teams constantly seek to advance the meaning of what’s possible.
What makes careers at SGH so special?
The only way to advance is to question and explore. Every member of the SGH team is both a learner and an educator, committed to advancing ourselves, our teams, and our industry. Together we are creating a community that never settles for what is but always seeks what could be.
There are many reasons to love SGH:
- Our Work:
Our clients trust us to bring clarity and deliver outstanding solutions for their most complex projects. - Our People:
We are bold thinkers and compassionate teammates, committed to lifelong learning and professional growth. - Our Commitment:
We live with integrity and embrace an obligation to give back to our professions and communities. - Our Contribution:
We offer a comprehensive and rich compensation and benefits package with company-paid and voluntary programs to help build healthy lifestyles, strong relationships, and future prosperity.
The Senior Administrative Assistant in our Waltham, MA office plays a multifaceted role, providing essential administrative and operational support to technical and office staff. This position requires sound judgment, strong organizational skills, attention to detail, and the ability to manage competing priorities in a fast‑paced environment. Success in this role requires clear communication, effective coordination of schedules and activities, and discretion in handling sensitive information.
With a dedicated team mindset, you champion quality and SGH standards, build trusted working relationships at all levels, and model responsiveness, accountability, and integrity.
Strategic Responsibilities and Impact on SGH
- Autonomous and Focused
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Works independently, manages competing priorities, and adjusts focus to meet deadlines while supporting team needs. - Oral and Written Communication
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Delivers clear, professional written and verbal communication tailored to diverse audiences; collaborates effectively and is receptive to feedback. - Ability to Prioritize
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Evaluates urgency versus importance to ensure preparedness and timely execution. - Team Attitude
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Approaches work with a positive, solutions‑oriented mindset; fosters strong working relationships and contributes to a cohesive environment. - Accountability
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Takes ownership of accuracy, follow‑through, and quality; identifies opportunities to improve processes and outcomes. - Confidentiality and Integrity
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Handles confidential information with discretion and professionalism; consistently demonstrates ethical judgment and integrity in all work and interactions.
What You’ll Do
- Serve as a trusted administrative resource, providing proactive support to staff and leadership with professionalism, judgment, and efficiency.
- Coordinate and support planning of meetings, office events, catering, presentations, client seminars, etc., and manage related calendar scheduling, ensuring materials and logistics are prepared in advance.
- Manage complex calendar, anticipate conflicts, and facilitate smooth coordination across varied schedules and stakeholders.
- Prepare, edit, and format general and technical documents to SGH quality standards.
- Support the management of technical staff licenses, including tracking renewals and credits.
- Coordinate travel arrangements.
- Process and reconcile expense reports.
- Partner with HR to facilitate the new hire onboarding process and coordinate orientation responsibilities.
- Coordinate with the IT department to…
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