Sebastian Lopera
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Sebastian Lopera Email & Phone Number

Senior Estimator at Maxum Drywall
Location: Toronto, Ontario, Canada 5 work roles 2 schools
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✓ Verified August 2026 3 data sources Profile completeness 100%

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Current company
Role
Senior Estimator
Location
Toronto, Ontario, Canada
Company size

Who is Sebastian Lopera? Overview

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Quick answer

Sebastian Lopera is listed as Senior Estimator at Maxum Drywall, a with 24 employees, based in Toronto, Ontario, Canada. AeroLeads shows a matched LinkedIn profile for Sebastian Lopera.

Sebastian Lopera previously worked as Senior Estimator at Ng Marin Inc and Construction Estimator at Dali Drywall. Sebastian Lopera holds Civil Engineering Technology from Humber College.

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Email format at Maxum Drywall

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Maxum Drywall

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Profile bio

About Sebastian Lopera

Enthusiastic, proactive, hardworking and highly motivated professional with a Civil Engineering Technology Degree

Listed skills include Highway Capacity Software, Autocad, Arcgis, Microsoft Office, and 11 others.

Current workplace

Sebastian Lopera's current company

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Maxum Drywall
Maxum Drywall
Senior Estimator
casselberry, florida, united states
Employees
24
AeroLeads page
5 roles

Sebastian Lopera work experience

A career timeline built from the work history available for this profile.

Senior Estimator

Current

Woodbridge, Ontario, Canada

•Prepare and submit detailed, accurate estimates for commercial and residential drywall projects ranging from $500k to $50m in value.•Develop and maintain relationships with clients, architects, and contractors to ensure seamless project coordination and communication.•Conduct on-site visits to assess job site conditions, identify potential issues, and gather necessary information to inform estimates.•Collaborate with project managers and field supervisors to ensure projects are completed on time and within budget, and provide ongoing support throughout the project lifecycle.•Manage a team of junior estimators, providing training and mentorship to support their development and growth.•Implement process improvements and best practices to streamline estimating workflows and improve efficiency.•Maintain knowledge of industry trends, materials, and regulations to inform accurate estimating and decision-making.•Provide value engineering, identifying opportunities to reduce costs while maintaining quality in drywall projects. By analyzing project specifications and identifying potential material substitutions.

Feb 2023 - Present

Senior Estimator

Ng Marin Inc

Vaughan, Ontario, Canada

•Review project plans and specifications to determine the scope of work and identify the requirements for drywall materials, labor, and equipment.•Create detailed material take-offs that include the quantity and cost of materials needed for the project. This involves identifying the type of drywall needed, estimating the number of sheets required, and calculating the amount of joint compound, tape, screws, and other supplies needed.•Analyze the labor and equipment requirements for the project and estimating the cost of these resources. This involves considering factors such as the complexity of the project, the size of the team required, and the availability of equipment.•Identify potential risks and challenges that could impact project timelines and costs. This involves analyzing potential issues such as weather delays, unforeseen site conditions, and changes in project scope.•Consult with contractors, architects, and other stakeholders to gather additional project information and ensure that project estimates are accurate and comprehensive.•Prepare and submit bids and proposals to potential clients. This involves providing detailed project estimates that include labor, materials, and equipment costs, as well as any applicable taxes, permits, and fees.•Maintain accurate records of project estimates and budgets. This involves tracking costs and ensuring that estimates are up-to-date and reflective of any changes in the project scope or requirements.

Dec 2021 - Jan 2023

Construction Estimator

Dali Drywall

Mississauga, Ontario, Canada

•Examine proposals, blueprints and specifications to determine job costs for various scopes of work in a timely manner.•Calculate competitive bid (ICI, design build & residential) proposals for high profile clients.•Produce detailed cost estimates for residential and commercial construction projects ranging from $100,000 to more than $10 million, using On Winbid/plexxis.•Perform quantity take-off and assist on estimates for projects ranging from $100,000 to over $10 million.•Work with vendors, suppliers to estimate costs for bid proposals.•Prepare material orders and other documents necessary to process the projects.•Serve as a liaison to ensure customer satisfaction with clients.•Maintain shop drawing records and ensure contact with Structural Engineering for inspections and legibility of the work performed onsite.•Negotiate with contractors in the best interest of the company and our clients.•Compile and review specifications related to the sub trades to avoid any extra cost at the final stage of proposal.•Uphold large working files as supporting documentation for estimating figures, marketing material, updates on price list, contract documents, specifications, official vendor quotes. •Review and issue RQP and RFI, addendums, and other contractual documents.

Mar 2020 - Nov 2021

Estimator/Project Manager

Lopes Group

Toronto, Ontario

•Examine proposals, blueprints and specifications to determine job costs for various scopes of work in a timely manner.•Calculate competitive bid (ICI and design build) proposals for high profile clients.•Produce detailed cost estimates for residential and commercial construction projects ranging from $100,000 to more than $5 million, using On Screen Takeoff and Planswift.•Perform quantity take-off and assist on estimates for projects ranging from $400,000 to over $10 million.•Work with vendors, suppliers to estimate costs for bid proposals.•Prepare material orders and other documents necessary to process the projects.•Serve as a liaison to ensure customer satisfaction with clients.•Maintain shop drawing records and ensure contact with Structural Engineering for inspections and legibility of the work performed onsite.•Negotiate with contractors in the best interest of the company and our clients.•Compile and review specifications related to the sub trades to avoid any extra cost at the final stage of proposal bid. •Prepare financial and progress reports in order to create accurate monthly invoicing.•Keep constantly communication with foremen onsite to maintain project on track as per schedule.•Estimate PCN and SI on time to control and mitigate impacts on schedule.•Uphold large working files as supporting documentation for estimating figures, marketing material, updates on price list, contract documents, specifications, official vendor quotes. •Review and issue RQP and RFI, addendums, and other contractual documents.

May 2014 - Mar 2020

Estimator/Inspector (Co-Op)

Ebeco Ltda

Medellin, Colombia

•Analyzed estimation packages and determined for cost recovery.•Monitored the work performed, the material incorporated in the work, the materials stored at the site and the contractor's manpower, equipment and report.•Undertaken overview supervision duties on site to ensure general compliance of the works with specification and contract requirements and when necessary cause to address deficiencies associated with the same.•Conducted visual inspections and performs on-site sampling and testing.

May 2013 - Jul 2013
Team & coworkers

Colleagues at Maxum Drywall

Other employees you can reach at maxumdrywall.com. View company contacts for 24 employees →

2 education records

Sebastian Lopera education

Civil Engineering Technology

Relevant Courses: AutoCAD Estimating Municipal Services Structural Analysis Highway Design Steel, Timber and Reinforced Concrete design.

FAQ

Frequently asked questions about Sebastian Lopera

Quick answers generated from the profile data available on this page.

What company does Sebastian Lopera work for?

Sebastian Lopera works for Maxum Drywall.

What is Sebastian Lopera's role at Maxum Drywall?

Sebastian Lopera is listed as Senior Estimator at Maxum Drywall.

Where is Sebastian Lopera based?

Sebastian Lopera is based in Toronto, Ontario, Canada while working with Maxum Drywall.

What companies has Sebastian Lopera worked for?

Sebastian Lopera has worked for Maxum Drywall, Ng Marin Inc, Dali Drywall, Lopes Group, and Ebeco Ltda.

Who are Sebastian Lopera's colleagues at Maxum Drywall?

Sebastian Lopera's colleagues at Maxum Drywall include Roshan Royan, Eduardo Navarro, Nick Gomes, Diego Perez, and Sathya Sashi.

How can I contact Sebastian Lopera?

You can use AeroLeads to view verified contact signals for Sebastian Lopera at Maxum Drywall, including work email, phone, and LinkedIn data when available.

What schools did Sebastian Lopera attend?

Sebastian Lopera holds Civil Engineering Technology from Humber College.

What skills is Sebastian Lopera known for?

Sebastian Lopera is listed with skills including Highway Capacity Software, Autocad, Arcgis, Microsoft Office, Ms Project, Microsoft Excel, Microsoft Word, and Powerpoint.

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