Milestone is looking for creative people who enjoy a challenge. We provide contracting excellence to our clients, daring them to let us collaborate on their toughest and most sensitive projects across Canada. Specializing in soil and ground remediation, water treatment, heavy civil construction, building decommissioning, land reclamation and rehabilitating sensitive habitats; our people thrive in a fast paced and everchanging environment. Everyone on our team believes in finding creative solutions for our clients while making a positive impact to our environment and community. This can be a tough job and isn’t for everyone. Milestone is up to the challenge, are you?

Milestone’s success comes from putting our team first. We are employee-owned and commit to keeping our people safe, offering competitive wages and benefits, and providing opportunity for professional growth and development. Putting our people first is a promise we have been able to deliver on for the last 10 years and we continue growing stronger. If you think you are a fit, then we want you to grow with us. Learn more about us and what we do on our website! MilestoneEnv.ca

At Milestone, we collaborate relentlessly; we strive to inspire a diverse team of talent; we care, we are equitable, we are inclusive. We want every team member to feel and know they belong here. We are inspired by our people - the best in the business. Our work with Indigenous partners and communities has been a tremendous source of pride and learning for Milestone. We are committed to Indigenous Peoples as partners and employees. We have much to learn from all our partners and employees. We look forward to continuing to attract and retain the best people to tackle the most complex challenges of a cleaner world. Only through acknowledging and encouraging everyone’s potential and contributions will we succeed.

Position Summary:

We are looking for a highly organized, proactive, and experienced Senior Administrative Assistant to support our senior leadership team and manage the day-to-day operations of our office.

This role combines high-level administrative support with operational oversight. You will play a critical role in driving efficiency, ensuring smooth office operations, and supporting key leaders through scheduling, communications, and project coordination. You oversee the office budgets.

If you are someone who thrives on multitasking, enjoys problem-solving, and takes pride in making everything run like clockwork – this opportunity is for you.

Duties & Responsibilities

Executive Administrative Support:

• Directly support the leadership team with calendar management, travel, meeting coordination, and communications;
• Prepare, edit, and format reports, presentations, letters, and spreadsheets;
• Assist in compiling and distributing scheduled reports and meeting materials;
• Record, distribute, and archive meeting minutes;
• Maintain accurate records, confidential files, and sensitive documentation;
• Support leadership with project coordination and execution.

Office Administration & Operations:

• Oversee day-to-day administrative office operations, including facilities, supplies, equipment, and services;
• Coordinate with other administrative staff;
• Manage office phone lines, incoming inquiries, mail, and couriers;
• Coordinate activities for internal and external meetings, guest visits, and events;
• Maintain vendor relationships (cleaning services, landlords, office suppliers, etc.);
• Reconcile monthly Visa statements and monitor office budgets;
• Order and manage office supplies and ensure timely replenishment;
• Contribute to continuous improvement and process optimization across administrative functions.

Health & Safety:

• Follow and support MECI’s Corporate Health and Safety Program and procedures;
• Participate in Health and Safety initiatives as required.

Qualifications

Education:

• Post-secondary education in office administration or related field is an asset.

Experience:

• Minimum 5 years of relevant experience in administrative support and/or office management, ideally in a professional services setting;
• Previous experience overseeing office operations or administrative staff is an asset;
• Previous hospitality experience is a strong asset.

Knowledge, Skills & Abilities:

• Exceptional verbal and written communication skills;
• Demonstrated exceptional computer literacy including effective working skills of the Microsoft Office Suite (Word, Excel, Visio, PDF);
• Highly organized, detail-oriented, and able to manage competing priorities;
• Self-starter with a process-improvement mindset;
• Approachable, dependable, and professional in demeanor;
• Comfortable interacting with internal teams, leadership, and external vendors/partners.

Compensation & Benefits:

• Competitive salary based on experience, skills, internal equity, and work location;
• Comprehensive health, dental, and prescription drug coverage;
• Annual pro-rated $500 Health Spending Account;
• Group Registered Savings Plan (GRSP) with employer matching after 3 months of employment;
• Three weeks’ vacation to start;
• Paid Annual Cultural Day to celebrate what matters most to you;
• Annual professional development budget to support certifications, training, and career advancement.

We would like to thank all applicants for their interest, however only the ones selected for the interview will be contacted.