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About

Delivering Australia’s Sovereign Capability through a Trusted Workforce

WorkSec provides end-to-end personnel security governance to individuals, businesses, and Government contractors. With a reputation for high compliance, tailored solutions, and exceptional service, we are the partner you can trust to secure your workforce and protect sensitive information.

Our mission

Building a Trusted Workforce for Australia’s Critical Sectors

WorkSec’s mission is to power Australia’s sovereign capability by building an industry-ready talent pool of skilled, security-cleared professionals. We support Government and Defence initiatives, as well as industry, with comprehensive security solutions that ensure compliance, mitigate risks, and provide long-term operational confidence.

Our team combines industry experience, innovative workflows, and human guidance to simplify security processes and ensure every client (whether an individual or enterprise) is well-equipped to meet evolving security demands.

Who are we?

Board of Directors

Our board is the backbone of WorkSec’s vision; seasoned professionals with deep expertise in security, compliance, and workforce transformation. They set the standard for integrity and innovation, guiding our mission to safeguard Australia’s Trusted Workforce and deliver real results for clients across Defence, Government, and Industry.

Managing Director

Managing Director with expertise in Defence, IT, and governance, leading WorkSec to strengthen Australia’s Trusted Workforce.

Director Culture & Brand

Director Culture & Brand, author and strategist, shaping trusted leadership and thriving teams through transformation and growth.

Director Trusted Workforce

Director Trusted Workforce, combining commercial acumen and governance expertise to strengthen Australia’s Trusted Workforce.

Delivering Australia’s Sovereign capability through a Trusted Workforce
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Who are we?

Our Dream Team

The strength of WorkSec lies in our people. Our dream team of security advisors, governance specialists, and support staff work together to deliver seamless, reliable, and responsive personnel security management. Dedicated to precision and professionalism, they are the engine powering our clients’ compliance confidence and workforce readiness.

National Manager Security Clearances

Experienced leader in security clearances, governance, and compliance; driving team excellence and client confidence.

Senior Security Advisor

Experienced Senior Security Advisor ensuring governance excellence, mentoring talent, and strengthening national security.

Senior Security Advisor

Dedicated Security Advisor ensuring governance excellence, trusted guidance, and client care across Defence and Government.

Security Advisor

Detail-driven Security Advisor, guiding clients with care, precision, and a passion for excellence in personnel security governance.

Security Advisor

Former RAAF officer with 12 years’ experience in security, leadership, and governance; now driving compliance excellence at WorkSec.

Business Development Manager

Business Development Manager with deep Defence networks, driving client engagement, growth, and strategic partnerships.

Member Services Coordinator

Member Services Coordinator dedicated to precision, process improvement, and delivering exceptional client support.

Why Choose WorkSec

Driving Security, Compliance, and Confidence

Experienced Team

Having conducted thousands of Employment Suitability Checks, Security Clearance Sponsorships and Changes in Circumstances, our team of Security Officers have the requisite knowledge and depth of experience to deliver high quality guidance and robust through life governance to our varied clientele.

Extended Support Hours

Providing advice at convenient times and expediting the security clearance process, WorkSec operates according to our ‘no-gap-in-service’ model. Available outside of business hours, 7 days a week, security clearance applicants and sponsored clients get the assistance they need when they need it.

High Tech, High Touch

Our systematised and automated workflows offer an optimal and seamless client experience, minimising manual errors and delays, freeing our experienced human capital to provide personnel security advisory where it is most needed.

Continuous Improvement

We are continuously and iteratively improving our operational and governance systems to meet and exceed compliance with regulatory frameworks including the PSPF and DSPF, as well as predicting future controls.

Security & Privacy

We maintain physical & information security systems to an exceptionally high standard, emphasising strong policies and processes around privacy, data security and handing of official sensitive information and your personal information.

Comprehensive Service Offering

Passionate about safeguarding Australia’s national security and building sovereign capability, we deliver our high-touch service to a diverse range of clients, including SMEs, Primes, Specialist Recruiters, Contractors and Individuals. This broad service offering is a testament to our capability to handle personnel security and governance needs at any scale.

Background

Services

WorkSec offers tailored security services, including security clearance sponsorship, personnel screening, and outsourced governance. Our solutions help clients stay compliant and protected while meeting the demands of critical industries.

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Tailored Solutions

WorkSec services clients Australia-wide, as well as international organisations employing Australian citizens. Our diverse clientele ranges from individuals seeking security clearance to recruitment agencies and enterprises requiring personnel security and compliance solutions.

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Ready to Get Started?

Whether you’re an individual seeking security clearance sponsorship or an organisation needing personnel security governance, reach out to WorkSec today to take the next step in securing your future.

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Tailored Solutions for:
SMEs DISP Members Recruiters Defence Primes Individuals
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Stuart Rainsford

Managing Director
Stuart Rainsford

Stuart is the Managing Director, Chief Security Officer, and Chief Information Security Officer of WorkSec. With more than 20 years of experience in enterprise security, ICT, and Defence, Stuart is a seasoned leader specialising in strategic planning, risk management, and operational excellence. Recognising the critical talent shortage in the Defence Industry, Stuart founded WorkSec to address personnel security governance challenges and strengthen Australia’s sovereign capability.

His career spans executive leadership in IT, cyber security, and Defence, where he has applied his expertise in governance, compliance, and operational oversight to deliver sustainable outcomes. Known as a “strategic activator”, Stuart combines visionary thinking with a decisive, action-oriented approach, ensuring ideas are swiftly transformed into practical results. This skill allows him to navigate complex challenges, drive innovation, and inspire teams to deliver on long-term strategic goals.

Stuart holds a Master’s Degree in Management, a Graduate Certificate in Business Administration, and is a Graduate of the Australian Institute of Company Directors (GAICD) and the Australian Centre for Business Growth. Currently completing his MBA, he has also served as a non-executive board member for several organisations and associations. With his blend of technical insight, governance expertise, and strategic activation, Stuart continues to guide WorkSec in delivering Trusted Workforce solutions that align with Australia’s national security priorities.

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Sari Mustonen-Kirk

Director Culture & Brand
Sari Mustonen-Kirk

Sari is WorkSec’s Director Culture & Brand, a recognised thought leader in business transformation, growth, and trusted leadership. With more than thirty years’ experience building and leading Dream Teams across financial services, sales, technology, and personnel security, Sari brings a unique 360-degree approach that blends governance, risk and compliance with creativity, brand strategy, and cultural development. A twice-published author and best-selling podcast producer and host, she is widely respected for her ability to translate complex ideas into practical frameworks for people and businesses to thrive.

At WorkSec, Sari is responsible for refining the company’s brand identity, embedding a strong Employee Value Proposition, and collaborating with the executive team to build a Trusted Workforce culture with Trusted Leadership at its core. She is shaping and maturing WorkSec’s key service offerings, including the Security Officer as a Service (SOaaS) and Trusted Workforce Program for Individuals (TWPI), ensuring they deliver both compliance assurance and high-touch client value. Her focus also includes enhancing the Employment Suitability Check (ESC) framework and advancing WorkSec’s governance and reporting models to meet evolving DISP and AGSVA requirements.

Sari continues to research and anticipate shifts in Defence and Government legislation, DISP, and PSPF/DSPF frameworks, ensuring WorkSec remains a leader in personnel security governance. She is currently developing her third book, ‘Trusted – A Playbook for Leaders’, which will showcase her Trusted Leadership model and the lessons drawn from WorkSec’s own journey. Known for her vision, authenticity, and commitment to people, Sari is instrumental in strengthening WorkSec’s culture and positioning the business as a market leader.

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Matt Kirk

Director Trusted Workforce
Matt Kirk

As Director Trusted Workforce, Matt brings more than three decades of leadership across global financial markets and, since 2020, the Australian security clearance sector. He was first engaged to design, staff, and scale a Security Clearances Capability for a DISP-accredited private company, growing a specialist team that facilitated more than 4,000 AGSVA security clearances at Baseline, NV1, and NV2 levels. Today, he leads WorkSec’s Trusted Workforce program, building and mentoring a team of Security Advisors to deliver enhanced services that get individuals and organisations “Defence and Government Ready.”

Prior to entering the personnel security space, Matt had a distinguished career in financial markets as a sought-after speaker, trader, and commentator. He co-authored the Private Trader’s Handbook: Bullseye – Top Trader Thinking (Wiley, 2006/2007) and has advised clients ranging from private investors to banks, institutions, and multinational corporations. His ability to manage portfolios of all sizes (from tens of thousands to over a billion dollars) established his reputation for commercial acumen, risk management, and operational precision.

Matt’s unique blend of compliance knowledge, distribution expertise, and leadership continues to shape the growth of WorkSec. He has built referral and distribution networks with Australia’s leading Defence and Government recruitment companies, while also securing partnerships with some of the world’s most recognisable brands, including Amazon, Google, Salesforce and Rolls-Royce. Known for his authenticity, approachable leadership, and “no-gap-in-service” ethos, Matt is a trusted advisor, a respected industry voice, and a driving force in delivering security-cleared talent to critical national projects.

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Kieran

National Manager Security Clearances
Kieran

Kieran is WorkSec’s National Manager Security Clearances and one of Australia’s most experienced industry-based Security Officers. Since joining as part of the pilot team delivering the first outsourced Security Clearance Capability for a DISP member, Kieran has been instrumental in shaping the policies and procedures that underpin today’s clearance sponsorship and governance practices. His work has laid the foundation for how individuals and corporate clients navigate the complex DISP and PSPF requirements with confidence.

Over his career, Kieran has assisted thousands of clearance applicants across Baseline, NV1, and NV2 levels, guiding them seamlessly through evolving AGSVA processes and DISP compliance obligations. His expertise spans the DISP Security Officer Dashboard, myClearance, DSPF and PSPF frameworks, as well as logistics, scheduling, and management reporting. Known for his integrity, maturity, and loyalty, Kieran is also a gifted leader, fostering inclusive team environments and mentoring new security officers to uphold the highest standards.

Kieran’s leadership ensures that WorkSec’s clients and clearance holders receive not only technical excellence but also reliable, consistent support throughout the clearance lifecycle. His focus on learning, development, and continuous improvement makes him a trusted partner in delivering compliant, resilient workforce security.

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Natasha

Senior Security Advisor
Natasha

Natasha is one of WorkSec’s most experienced Senior Security Advisors, specialising in personnel security governance across Defence and Government contracts. She interprets and applies PSPF, DSPF, DISP, and AGSVA requirements, guiding clearance holders through Employment Suitability Checks, AGSVA myClearance applications, security awareness training, and ongoing DISP compliance. Natasha plays a central role in shaping WorkSec’s governance frameworks, policies, and training programs, ensuring the Trusted Workforce operates at the highest standards.

With a professional background spanning business management, operations, and client services across industries including healthcare, travel, and manufacturing, Natasha brings a diverse and adaptable skillset to her role. She is highly regarded for her ability to build strong relationships, resolve complex challenges, and quickly master new systems and technologies. A Bachelor of Business Management and Registered Midwife, Natasha embodies a rare combination of technical rigour, compassion, and leadership.

Respected for her integrity, attention to detail, and “no stone left unturned” ethos, Natasha is both a mentor and role model within the WorkSec team. Her professionalism and positivity inspire colleagues and clients alike, making her not only a powerhouse of governance expertise but also a much-loved member of the Dream Team.

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Renée

Senior Security Advisor
Renée

Renee is a Senior Security Advisor at WorkSec, specialising in the interpretation and application of PSPF, DSPF, DISP, and AGSVA requirements. Her mandate is to ensure robust governance over the WorkSec Trusted Workforce, supporting security-cleared personnel contracting into Defence and Government agencies. Renee’s role spans shaping security principles and policies, mentoring new staff, and contributing to the continuous improvement of security processes across the organisation.

Renee was part of the pioneering pilot team that helped design and deliver the Security Clearances Capability for a DISP-accredited corporate client – laying the groundwork for many of the procedures and standards WorkSec applies today. With a diverse background in business management, operations, and client support, she brings a unique mix of precision, adaptability, and people-first leadership. Her ability to forge partnerships, resolve complex challenges, and embrace new systems quickly has made her a highly trusted and effective advisor.

Known for her integrity, attention to detail, and responsiveness, Renee is valued not only by clients but also by her colleagues. Her genuine care for people and dedication to building a security-conscious workforce make her an integral part of WorkSec’s culture. Trusted, adaptable, and empathetic, Renee continues to strengthen WorkSec’s reputation for delivering consistent, high-quality governance and support in a dynamic security environment.

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Catherine

Security Advisor
Catherine

Catherine is a Security Advisor at WorkSec, supporting individuals and corporate personnel through Employment Suitability Checks, AGSVA myClearance applications, security awareness training, and ongoing DISP/AGSVA governance. With a teacher’s eye for detail and a client-focused approach, she ensures every enquiry is met with clear, thorough, and helpful guidance, giving clients confidence at every step of the process.

With over 20 years as a senior educator and outdoor learning leader, Catherine developed a strong foundation in planning, mentoring, and delivering training; skills she now applies to supporting clearance holders and developing WorkSec’s own procedures. Her experience managing offices, client services, and complex administrative systems translates directly into her meticulous approach to governance and reporting.

Since joining WorkSec, Catherine has been commended for her professionalism, adaptability, and proactive contribution to improving standard operating procedures. Her enthusiasm and willingness to embrace challenges make her an invaluable member of the team. By blending her education background with her governance expertise, Catherine helps build a culture of precision, accountability, and trust across the WorkSec Trusted Workforce.

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Willem

Security Advisor
Willem

Willem is a Security Advisor at WorkSec with a strong background in Defence and personnel security governance. As a former RAAF Ground Defence Officer, Willem served for 12 years in leadership, training, and operational security roles, managing teams of up to 30 personnel and overseeing base, asset, and force protection in Australia and overseas. His expertise includes operational planning, risk assessment, security instruction, and the development of training programs that streamlined readiness and improved mission outcomes.

At WorkSec, Willem applies this Defence-honed discipline and leadership to supporting clients and clearance holders through Employment Suitability Checks, AGSVA myClearance applications, and DISP/AGSVA governance. He has been instrumental in refining Standard Operating Procedures, developing training pathways, and contributing to the continuous improvement of WorkSec’s governance frameworks. Known for his energy, attention to detail, and adaptability, Willem is a trusted advisor who ensures every client interaction is met with professionalism and precision.

Alongside his Defence credentials, Willem holds a Bachelor of Arts in History from UNSW Canberra and a Diploma in Leadership and Management. His experience in both security operations and training makes him a vital part of WorkSec’s Dream Team; strengthening governance, mentoring colleagues, and ensuring that clients remain compliant, prepared, and supported in a dynamic security environment.

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Natalie

Business Development Manager
Natalie

Natalie is WorkSec’s Business Development Manager, bringing a powerful combination of Defence expertise, education leadership, and strategic communications to the team. With extensive networks across the Defence sector, she is instrumental in expanding WorkSec’s presence and strengthening our role as a trusted partner in workforce security.

Her Defence background includes working within Army Headquarters as a strategic writer on capability documentation for government, where she developed a thorough understanding of the Defence Capability Life Cycle and its critical role in shaping force readiness. She has also led enterprise-wide capability and training strategies, including Defence’s CapabilityOne Training uplift initiative, aligning operational needs with organisational objectives and delivering measurable outcomes.

Natalie holds two Master’s degrees and a Bachelor’s degree, underscoring her strong academic foundation and commitment to lifelong learning. Her career spans education leadership, human resource management, policy strategy, and stakeholder engagement, giving her a unique ability to connect strategic vision with practical delivery. She has designed and implemented tailored learning programs, mentored senior leaders, and driven organisational transformation across both government and corporate sectors.

At WorkSec, Natalie leads client engagement, referral programs, and strategic partnerships, while also serving as a visible brand ambassador at industry events. She plays a central role in driving business growth nationally, while continuing to deepen her expertise in PSPF, DSPF, and DISP frameworks. With her blend of Defence familiarity, leadership capability, and relationship-building expertise, she builds trust quickly and drives action across Defence, government, and industry. Natalie is a dynamic and valued member of the WorkSec Dream Team.

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Jess

Member Services Coordinator
Jess

Jess is WorkSec’s Member Services Coordinator, supporting clients and the team through expert coordination, financial management, and through-life sponsorship services. With a focus on accuracy and continuous improvement, she ensures every client experience with WorkSec is seamless while strengthening internal systems, processes, and team collaboration.

Having successfully built and managed her own businesses, Jess brings a strong entrepreneurial mindset to her role. Her experience overseeing end-to-end operations (customer engagement, financial oversight, service delivery, and process design) has given her a unique ability to identify improvements, anticipate client needs, and deliver practical solutions. This business ownership background underpins her ability to balance detail with big-picture thinking, making her a trusted partner to both clients and colleagues.

Jess’s strengths lie in her discipline, consistency, and empathy, enabling her to combine structure and fairness with genuine care for people. She is recognised within the team for streamlining processes, documenting procedures, and championing service excellence. With her entrepreneurial drive and collaborative approach, Jess is an invaluable member of the WorkSec Dream Team.

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