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Sigra employs people from diverse professions, backgrounds, disciplines, ethnicities and ages. We have:

We have a flat, multi-skilled organisational structure:

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Meet our team

[/fusion_title][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container type=”flex” hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” align_content=”stretch” flex_align_items=”flex-start” flex_justify_content=”flex-start” hundred_percent_height_center_content=”yes” equal_height_columns=”no” container_tag=”div” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” padding_top=”60px” padding_bottom=”40px” border_style=”solid” box_shadow=”no” box_shadow_blur=”0″ box_shadow_spread=”0″ gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ background_position=”center center” background_repeat=”no-repeat” fade=”no” background_parallax=”none” enable_mobile=”no” parallax_speed=”0.3″ background_blend_mode=”none” video_aspect_ratio=”16:9″ video_loop=”yes” video_mute=”yes” pattern_bg=”none” 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sticky_display=”normal,sticky” content_align=”left” size=”4″ text_shadow=”no” text_shadow_blur=”0″ margin_top=”0″ gradient_font=”no” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ style_type=”default” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]Dr Ian Gray – Managing Director[/fusion_title][fusion_text hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]

PhD, MAppSc (Hydrology, Engineering Geology), BE (Civil), RPEQ

ian@sigra.com.au

Ian founded Sigra as a one man business in 1994 – since then the company has grown under his guidance. Ian is a multidisciplinary engineer and inventor with a 45 year professional career spanning the civil, mining and petroleum industries across multiple continents, both in government research roles and industry roles. His expertise is broad and he has published over 80 papers and regularly shares findings distilled from Sigra’s research at professional institutions, industry conferences and universities. Ian holds multiple patents on such diverse topics as mining systems and gas-liquid separators.

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transition_duration=”300″ transition_easing=”ease” scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”true” border_position=”all” first=”true” min_height=”” link=””][fusion_title title_type=”text” rotation_effect=”bounceIn” display_time=”1200″ highlight_effect=”circle” loop_animation=”off” highlight_width=”9″ highlight_top_margin=”0″ title_link=”off” link_target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” content_align=”left” size=”4″ text_shadow=”no” text_shadow_blur=”0″ gradient_font=”no” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ style_type=”default” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ margin_top=”0″]Tim Harvey – Principal Engineer[/fusion_title][fusion_text hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]

Dip (Civil), Associate Dip (Mining)

tim@sigra.com.au

Tim has 50 years of engineering experience, firstly as a Civil Engineer and then more substantially as a Mining Engineer. Tim has worked with Sigra since 2014 and has assisted with both practical and consulting engineering projects. Tim’s recent experience has been mainly associated with mine ventilation, gas management and spontaneous combustion control. He also has extensive experience in mine planning and scheduling, feasibility studies, economic modelling, budgeting and project management, mine drainage, shaft sinking and mining through difficult conditions.

[/fusion_text][fusion_button link=”/wp-content/uploads/2023/10/4.Tim-Harvey-CV.pdf” target=”_blank” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” color=”default” linear_angle=”180″ stretch=”default” margin_top=”20px” icon=”fusion-prefix-feather-icon-arrow-right-circle” icon_position=”right” icon_divider=”no” hover_transition=”none” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]Read Tim’s CV here[/fusion_button][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container type=”flex” hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” align_content=”stretch” flex_align_items=”flex-start” flex_justify_content=”flex-start” hundred_percent_height_center_content=”yes” equal_height_columns=”no” container_tag=”div” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” padding_top=”60px” padding_bottom=”40px” 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transition_duration=”300″ transition_easing=”ease” scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”false” border_position=”all” first=”true” margin_top=”10px” min_height=”” link=””][fusion_imageframe image_id=”17013|full” custom_aspect_ratio=”100″ lightbox=”no” linktarget=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” align_medium=”none” align_small=”none” align=”center” hover_type=”none” magnify_duration=”120″ scroll_height=”100″ scroll_speed=”1″ caption_style=”off” caption_align_medium=”none” caption_align_small=”none” caption_align=”none” caption_title_tag=”2″ animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ filter_hue=”0″ filter_saturation=”100″ filter_brightness=”100″ filter_contrast=”100″ filter_invert=”0″ filter_sepia=”0″ filter_opacity=”100″ filter_blur=”0″ filter_hue_hover=”0″ filter_saturation_hover=”100″ filter_brightness_hover=”100″ filter_contrast_hover=”100″ filter_invert_hover=”0″ filter_sepia_hover=”0″ filter_opacity_hover=”100″ filter_blur_hover=”0″]https://sigra.com.au/wp-content/uploads/2024/04/Brett.jpg[/fusion_imageframe][/fusion_builder_column][fusion_builder_column type=”3_4″ layout=”1_1″ align_self=”auto” content_layout=”column” align_content=”flex-start” valign_content=”flex-start” content_wrap=”wrap” center_content=”no” column_tag=”div” target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” order_medium=”0″ order_small=”0″ hover_type=”none” border_style=”solid” box_shadow=”no” box_shadow_blur=”0″ box_shadow_spread=”0″ background_type=”single” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ lazy_load=”none” background_position=”left top” background_repeat=”no-repeat” background_blend_mode=”none” 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scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”true” border_position=”all” first=”false” min_height=”” link=””][fusion_title title_type=”text” rotation_effect=”bounceIn” display_time=”1200″ highlight_effect=”circle” loop_animation=”off” highlight_width=”9″ highlight_top_margin=”0″ title_link=”off” link_target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” content_align=”left” size=”4″ text_shadow=”no” text_shadow_blur=”0″ gradient_font=”no” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ style_type=”default” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ margin_top=”0″]Brett Stewart – Projects Manager[/fusion_title][fusion_text hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]

BE (Mechanical)

brett@sigra.com.au

Brett joined Sigra in 2006 as a mechanical engineer providing field services and mechanical engineering design. Since then, he has been integral in the continued improvement of Sigra’s field systems and operations. Brett has been involved in most of Sigra’s field operations since 2006 and specialises in co-ordinating and managing projects, liaising with stakeholders and providing solutions to complex issues in the fields.

[/fusion_text][fusion_button link=”/wp-content/uploads/2023/10/5.Brett-Stewart-CV.pdf” target=”_blank” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” color=”default” linear_angle=”180″ stretch=”default” margin_top=”20px” icon=”fusion-prefix-feather-icon-arrow-right-circle” icon_position=”right” icon_divider=”no” hover_transition=”none” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]Read Brett’s CV here[/fusion_button][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container type=”flex” hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” align_content=”stretch” flex_align_items=”flex-start” flex_justify_content=”flex-start” hundred_percent_height_center_content=”yes” equal_height_columns=”no” container_tag=”div” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” padding_top=”60px” padding_bottom=”40px” 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transition_duration=”300″ transition_easing=”ease” scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”false” border_position=”all” first=”true” margin_top=”10px” min_height=”” link=””][fusion_imageframe image_id=”17015|full” custom_aspect_ratio=”100″ lightbox=”no” linktarget=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” align_medium=”none” align_small=”none” align=”center” hover_type=”none” magnify_duration=”120″ scroll_height=”100″ scroll_speed=”1″ caption_style=”off” caption_align_medium=”none” caption_align_small=”none” caption_align=”none” caption_title_tag=”2″ animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ filter_hue=”0″ filter_saturation=”100″ filter_brightness=”100″ filter_contrast=”100″ filter_invert=”0″ filter_sepia=”0″ filter_opacity=”100″ filter_blur=”0″ filter_hue_hover=”0″ filter_saturation_hover=”100″ filter_brightness_hover=”100″ filter_contrast_hover=”100″ filter_invert_hover=”0″ filter_sepia_hover=”0″ filter_opacity_hover=”100″ filter_blur_hover=”0″]https://sigra.com.au/wp-content/uploads/2024/04/Darryl.jpg[/fusion_imageframe][/fusion_builder_column][fusion_builder_column type=”3_4″ layout=”1_1″ align_self=”auto” content_layout=”column” align_content=”flex-start” valign_content=”flex-start” content_wrap=”wrap” center_content=”no” column_tag=”div” target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” order_medium=”0″ order_small=”0″ hover_type=”none” border_style=”solid” box_shadow=”no” box_shadow_blur=”0″ box_shadow_spread=”0″ background_type=”single” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ lazy_load=”none” background_position=”left top” background_repeat=”no-repeat” background_blend_mode=”none” 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scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”true” border_position=”all” first=”false” min_height=”” link=””][fusion_title title_type=”text” rotation_effect=”bounceIn” display_time=”1200″ highlight_effect=”circle” loop_animation=”off” highlight_width=”9″ highlight_top_margin=”0″ title_link=”off” link_target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” content_align=”left” size=”4″ text_shadow=”no” text_shadow_blur=”0″ gradient_font=”no” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ style_type=”default” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ margin_top=”0″]Darryl Smith – Senior Engineer[/fusion_title][fusion_text hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]

BE (Chemical)

darryl@sigra.com.au

Darryl joined Sigra in 2006, bringing over 10 years of experience as a chemical engineer with him. Darryl manages field projects while also playing a leading role in the development of Sigra’s laboratories. His experience in chemical engineering and geomechanics provides him with a broad knowledge which he effectively applies to in-situ stress, permeability, gas content and desorption analysis and reporting.

[/fusion_text][fusion_button link=”/wp-content/uploads/2023/10/7.Darryl-Smith-CV.pdf” target=”_blank” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” color=”default” linear_angle=”180″ stretch=”default” margin_top=”20px” icon=”fusion-prefix-feather-icon-arrow-right-circle” icon_position=”right” icon_divider=”no” hover_transition=”none” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]Read Darryl’s CV here[/fusion_button][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container type=”flex” hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” align_content=”stretch” flex_align_items=”flex-start” flex_justify_content=”flex-start” hundred_percent_height_center_content=”yes” equal_height_columns=”no” container_tag=”div” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” padding_top=”60px” padding_bottom=”40px” 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filter_saturation_hover=”100″ filter_brightness_hover=”100″ filter_contrast_hover=”100″ filter_invert_hover=”0″ filter_sepia_hover=”0″ filter_opacity_hover=”100″ filter_blur_hover=”0″]https://sigra.com.au/wp-content/uploads/2024/04/Ratheesh.jpg[/fusion_imageframe][/fusion_builder_column][fusion_builder_column type=”3_4″ layout=”1_1″ align_self=”auto” content_layout=”column” align_content=”flex-start” valign_content=”flex-start” content_wrap=”wrap” center_content=”no” column_tag=”div” target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” order_medium=”0″ order_small=”0″ hover_type=”none” border_style=”solid” box_shadow=”no” box_shadow_blur=”0″ box_shadow_spread=”0″ background_type=”single” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ lazy_load=”none” background_position=”left top” background_repeat=”no-repeat” background_blend_mode=”none” 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scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”true” border_position=”all” first=”false” min_height=”” link=””][fusion_title title_type=”text” rotation_effect=”bounceIn” display_time=”1200″ highlight_effect=”circle” loop_animation=”off” highlight_width=”9″ highlight_top_margin=”0″ title_link=”off” link_target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” content_align=”left” size=”4″ text_shadow=”no” text_shadow_blur=”0″ gradient_font=”no” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ style_type=”default” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ margin_top=”0″]Ratheesh Keloth – Senior Engineer[/fusion_title][fusion_text hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]

BE (Mechanical)

ratheesh@sigra.com.au

Ratheesh joined Sigra in 2007 as a field engineer. While working at Sigra he completed his BE in mechanical engineering. Ratheesh was already a toolmaker and this combined experience enables him to be a practical engineer who can design and fabricate testing equipment and also provides leadership in the field. Ratheesh has an excellent understanding of mechanics, fluid systems, instrumentation, drafting and machining.

[/fusion_text][fusion_button link=”/wp-content/uploads/2023/10/6.Ratheesh-Keloth-CV.pdf” target=”_blank” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” color=”default” linear_angle=”180″ stretch=”default” margin_top=”20px” icon=”fusion-prefix-feather-icon-arrow-right-circle” icon_position=”right” icon_divider=”no” hover_transition=”none” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]Read Ratheesh’s CV here[/fusion_button][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container type=”flex” hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” align_content=”stretch” flex_align_items=”flex-start” flex_justify_content=”flex-start” hundred_percent_height_center_content=”yes” equal_height_columns=”no” container_tag=”div” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” padding_top=”60px” 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caption_margin_top=”” caption_margin_right=”” caption_margin_bottom=”” caption_margin_left=”” animation_type=”” animation_direction=”left” animation_color=”” animation_speed=”0.3″ animation_delay=”0″ animation_offset=”” filter_hue=”0″ filter_saturation=”100″ filter_brightness=”100″ filter_contrast=”100″ filter_invert=”0″ filter_sepia=”0″ filter_opacity=”100″ filter_blur=”0″ filter_hue_hover=”0″ filter_saturation_hover=”100″ filter_brightness_hover=”100″ filter_contrast_hover=”100″ filter_invert_hover=”0″ filter_sepia_hover=”0″ filter_opacity_hover=”100″ filter_blur_hover=”0″]https://sigra.com.au/wp-content/uploads/2024/05/Tatyana-Kolesnichenko.jpg[/fusion_imageframe][/fusion_builder_column][fusion_builder_column type=”3_4″ layout=”1_1″ align_self=”auto” content_layout=”column” align_content=”flex-start” valign_content=”flex-start” content_wrap=”wrap” center_content=”no” column_tag=”div” target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” order_medium=”0″ order_small=”0″ hover_type=”none” border_style=”solid” box_shadow=”no” box_shadow_blur=”0″ box_shadow_spread=”0″ background_type=”single” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ lazy_load=”none” background_position=”left top” background_repeat=”no-repeat” background_blend_mode=”none” sticky=”off” sticky_devices=”small-visibility,medium-visibility,large-visibility” absolute=”off” filter_type=”regular” filter_hover_element=”self” filter_hue=”0″ filter_saturation=”100″ filter_brightness=”100″ filter_contrast=”100″ filter_invert=”0″ filter_sepia=”0″ filter_opacity=”100″ filter_blur=”0″ filter_hue_hover=”0″ filter_saturation_hover=”100″ filter_brightness_hover=”100″ filter_contrast_hover=”100″ filter_invert_hover=”0″ filter_sepia_hover=”0″ filter_opacity_hover=”100″ filter_blur_hover=”0″ transform_type=”regular” transform_hover_element=”self” transform_scale_x=”1″ transform_scale_y=”1″ transform_translate_x=”0″ transform_translate_y=”0″ transform_rotate=”0″ transform_skew_x=”0″ transform_skew_y=”0″ transform_scale_x_hover=”1″ transform_scale_y_hover=”1″ transform_translate_x_hover=”0″ transform_translate_y_hover=”0″ transform_rotate_hover=”0″ transform_skew_x_hover=”0″ transform_skew_y_hover=”0″ transition_duration=”300″ transition_easing=”ease” scroll_motion_devices=”small-visibility,medium-visibility,large-visibility” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ last=”true” border_position=”all” first=”false” min_height=”” link=””][fusion_title title_type=”text” rotation_effect=”bounceIn” display_time=”1200″ highlight_effect=”circle” loop_animation=”off” highlight_width=”9″ highlight_top_margin=”0″ title_link=”off” link_target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” content_align=”left” size=”4″ text_shadow=”no” text_shadow_blur=”0″ gradient_font=”no” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ style_type=”default” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″ margin_top=”0″]Tatyana Kolesnichenko – Financial Controller[/fusion_title][fusion_text hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]

BBus (Ec & Fin), MPAcc

tatyana@sigra.com.au

Tatyana initially worked with Sigra doing translation of reports, field work, then marketing, roles she held from 2009 to 2012. After completing Australian qualifications and gaining work experience she re-joined Sigra in 2014 as an accountant. She works closely with the Sigra leadership team to assist them in meeting strategic business objectives. She implements working procedures to increase efficiency and devises company financial strategy and overall cost structures to reduce overheads and position Sigra for growth. She has been a key player in running Sigra’s overseas operations.

[/fusion_text][fusion_button link=”/wp-content/uploads/2023/10/10.Tatyana-Kolesnichenko-CV.pdf” target=”_blank” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” sticky_display=”normal,sticky” color=”default” linear_angle=”180″ stretch=”default” margin_top=”20px” icon=”fusion-prefix-feather-icon-arrow-right-circle” icon_position=”right” icon_divider=”no” hover_transition=”none” animation_direction=”left” animation_speed=”0.3″ animation_delay=”0″]Read Tatyana’s CV here[/fusion_button][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]