Our Leaders
Credentialed. Rigorous. Responsive.
The People Behind the Practice
Behind every solution at Sunesis is a team of seasoned professionals united by a single purpose - to help organizations build strength through governance and compliance done well.
Each member brings deep technical expertise, diverse industry experience, and a disciplined commitment to integrity, precision, and progress. With an average of 19 years in governance, risk, and control, our leadership team combines depth, continuity, and practical insight.
We’ve worked side by side with clients of every size as partners who understand both the rigor of compliance and the realities of business.
Our engagements are led by experts - the same professionals who design the solution see it through, every time. No hand-offs. No surprises. The same experts, end-to-end.
The right people elevate the work - bringing experience, precision, and purpose together to build better business.
Meet our Leaders
A dedicated group of experts, united by trust and purpose - working alongside clients to strengthen resilience and performance across every industry.
Lori Caltagirone, CPA
President & CEO
A Chartered Accountant and highly accomplished Internal Audit expert, Lori Caltagirone is the industry-renowned founder of Sunesis and has over three decades of experience in internal auditing across various industries, including energy, finance, and government.
Considered a category expert, Lori has created and led Sarbanes-Oxley compliance programs, governance evaluations, enterprise risk management systems and internal audit functions for national and multi-national companies. Known for her leadership and strategic vision, Lori excels in aligning the internal audit function with broader organizational goals, driving risk management, compliance, and governance initiatives to bring objectivity, assurance and insight to each organization the Sunesis team serves.
Lori’s expertise also lies in establishing effective internal audit plans, ensuring that the highest priority risks are evaluated, overseeing internal audit teams to ensure the audit plan is competently executed in a manner that is collaborative and constructive, and providing actionable insights to senior management that address the risks with minimal bureaucracy and implementation costs. She has earned a reputation for anticipating emerging risks and implementing proactive solutions, enhancing operational efficiency and internal controls across organizations.
As a leader who is committed to continuous improvement, not just within audit processes, but in shaping overall strategic direction, Lori brings a deep understanding of regulatory frameworks and best practices to each challenge, allowing her to guide organizations through complex compliance issues, and making her a trusted advisor to executive leadership and boards.
Lynn Luu, CPA
Director, Compliance
With over a decade of experience in the fields of financial reporting compliance, corporate governance, and risk management, Lynn successfully leads teams and clients through complex regulatory landscapes while maintaining operational excellence, ensuring compliance with the highest standards of financial accountability and governance.
A key senior team member of Sunesis, Lynn has specialized expertise in a variety of industries, including oil and gas, energy and utilities, and real estate. She has worked as project lead for both Canadian and U.S.-listed public companies to develop and execute compliance programs, ensuring that organizations adhere to regulatory frameworks, implement strong internal controls, and effectively manage enterprise risks to minimize organizational vulnerabilities. Lynn also serves as the "Control Hotline" expert for teams and clients facing challenging control and compliance issues, offering practical guidance and actionable recommendations to help organizations address risks effectively and efficiently.
Lynn’s deep understanding of regulatory frameworks, risk management, and controls, combined with her ability to simplify complex issues, has made her a trusted advisor for organizations seeking compliance and risk management expertise.
Bolin Zhang, PMP, MBA
Director, Internal Audit
With a robust background in data analytics and finance, Bolin brings extensive expertise and a unique skill set to every Sunesis project.
As Director, Internal Audit, Bolin draws from a wealth of experience in CSOX compliance, project management and internal auditing. He has successfully led over 30 complex audits, including emissions verification, Enterprise Risk Management (ERM), fraud investigations, facility construction audits, and comprehensive CSOX compliance projects, primarily for publicly traded companies in the energy and real estate sectors. Prior to joining Sunesis in 2020, Bolin spent four years as a project engineer for an EPC company, supporting Oil & Gas facility design and construction projects. With education in mechanical engineering, and an MBA in finance, along with his project management experience, Bolin deftly integrates data analytics with strategic financial insights, optimizes processes, enhances operational efficiencies, all the while delivering substantial cost savings to clients.
Bolin’s combination of highly tuned analytical thinking, disciplined adherence to process, and intuitive business insight make him a highly valued member of the Sunesis team.
Polly Berthelot, CISA
Senior Manager, IT
Highly-specialized and experienced, Polly is a Certified Information Systems Auditor (CISA), with over 20 years of business experience in the Information Technology and IT Audit professions.
As Head of Sunesis’ CobiT Methodology arm, she specializes in IT control evaluation, documentation and compliance testing for SOX and C-SOX regulatory requirements, from large oil and gas transportation companies to junior oil and gas producers. Her expertise lies in the identification and evaluation of IT risks, IT general computer controls, IT security and operational processes, disaster recovery plans, business resumption and business continuity plans. After beginning her professional career in IT Operations, she held positions in various Business Continuity, Resumption, and Disaster Recovery roles, as well as facilitated Project Management projects to support activities between business and IT.
As an expert in the increasingly vital are of IT auditing and risk assessment, Polly’s experience, critical thinking and highly trained eye have proved invaluable for our internal senior team, and ultimately, our clients.
Katrina Mamuric, CA
Senior Advisor
Katrina has a passion for excellence that is evident in everything she does in her high-profile role as Senior Advisor at Sunesis.
After beginning her career with KPMG, Katrina joined Sunesis and has accumulated over five years of experience in SOX and C-SOX compliance, testing and documenting controls focused on oil & gas companies, such as Crescent Point Energy Corporation, Enerplus Corporation, Advantage Oil & Gas, Tourmaline Oil Corp., Crew Energy, Painted Pony Petroleum and Perpetual Energy. She has applied her expertise in compliance by assessing organizations’ materiality levels, the operating effectiveness of control activities and control design. Her expertise extends to the areas of Revenue, Joint Interest, Capital, Land, Purchase to Payments, Financial Reporting and Mergers & Acquisitions. Additionally, Katrina has used her analytical skills to help identify process improvement recommendations over capital accruals and capital monitoring. And her extensive experience in organizational governance has made Katrina the top COSO expert at Sunesis.
With a formidable blend of experience, skill and innate business insight, Katrina plays a pivotal role in delivering sophisticated input on a wide variety of complex challenges for our clients.
Mark Prystajecky
CA, CPA
Mark is a Chartered Accountant/CPA with strong and diverse expertise in governance, financial compliance, internal controls assessment, enterprise risk management (ERM), operational reviews, budget preparation, and financial reporting.
His experience includes developing and executing risk-based audit plans, performing financial compliance (CSOX and SOX) reviews, developing ERM programs and models, performing business process reviews, carrying out special investigations, and responding to whistleblower reports. He also has extensive experience with the COSO and COBIT frameworks as well as in performing fraud risk assessments and IT governance reviews.
Having worked in organizations of varying size (Encana, NAL Energy/Manulife, Trican, Auditor General of Alberta), Mark has prepared cyclical audit plans, quarterly Audit Committee reports, and confidential fraud investigation reports. He is also seasoned at managing projects across different countries and time zones, having overseen and coordinated audit activities in multiple international jurisdictions, including Russia, USA, Kazakhstan, and Ecuador. In addition to his professional interest in effective internal controls and governance, Mark has also participated in several Government of Canada election observation missions in Ukraine.
With his wide-ranging and diverse experience, along with a proven track record on key, high-profile projects, Mark is a valued leader who bolsters the overall strength of the Sunesis team.
Jimimah Banatao
CPA
Previously from Deloitte, where she earned her CPA designation in 2021, Jimimah brings a wealth of experience in advisory, external audit and assurance.
Since joining Sunesis in 2023, she has played an integral role in conducting comprehensive audits, utilizing a risk-based methodology and ensuring adherence to various accounting standards like IFRS, ASPE, and ASNPO. Jimimah has supported clients through the complexities of standards and plays a crucial part in enhancing their internal control over financial reporting and operational efficiency.
With clarity, insight and a calm, personable approach, Jimimah applies the highest degree of diligence and unwavering dedication to every aspect of her work.
